Rose Technics QT-X

Disclaimer​

The QT-X was sent to me by Rose Technics in order to make this review. However, all opinions I shared here today are entirely my own, and they are all based only on my personal experience with the product and free from any external influence. Rose Technics has never directed me what I should write or when to publish a review, and today's review is no different. They are always allowing me full freedom to share my honest thoughts.

I want to thank Rose Technics for this amazing opportunity, and I want to thank you, the reader, for your trust and for taking your time to read my review.

The full review can also be found on https://mobileaudiophile.com/, via this link

Introduction​

When I first saw the Rose Technics QT-X, I was immediately drawn to it. This is the flagship hybrid IEM from Rose, and they have packed a lot of things into this model. With a configuration of seven drivers per ear (1DD+6BA), a unique ergonomic design, and a very unique and eye catching design, which in my case represents a night sky look, I was curious to see if it will perform as amazingly as it looks.

Priced in, I would say, the higher mid fi range (340$), the QT-X is marketed as a premium product, and from everything I have seen and heard about it, it seems to live up to that label. From the moment I took it out of the box, I could tell Rose Technics put a lot of thought into not only the sound but also the whole user experience. So today I'm here to see if everything I've heard is true or not.

Unboxing​

When I unboxed the QT-X, the packaging immediately felt like it was over the top. The box reminded me a lot of the QT9 MK3 one, just with a big "X" on the front, which actually looks kind of like a Creeper face from Minecraft. It opens to the side like a book, giving off a premium vibe. Inside, there’s even a big card showing off the IEM and its features, plus a little manual card.

Honestly, they could’ve packed all of this into a smaller box, especially with the amount of foam they used. It felt like a lot of extra material that wasn’t necessary. And of course the glue on the foam left residue everywhere...

Inside the box, you get quite a bit of stuff. There’s a leatherette case that looks big from the outside but is actually too small inside to fit both the IEM and the dongle together comfortably. You also get:

• Four sizes of silicone tips (probably XS, S, M, L)
• Four sets of small foam tips
• Four sets of spare nozzle dust filters
• And for the value edition I got, the RZ-300M dongle DAC

It’s definitely generous in terms of accessories, but the case and packaging could use some improvements.

Technical Specifications​

Specs​

• Balanced Armature Drivers: 30018 x 2, 29689 x 2, 30019 x 2
• Dynamic Driver: 10mm LCP tesla diaphragm
• Impedance: 18 Ω
• Sensitivity: 108 dB
• Frequency Response Range: 20 - 20000 Hz
• Connector Type: 0.78 2 pin
• Interface Type: 3.5 mm/ 4.4mm
• Cable Length: 120 cm
• Weight: 30g ± 3g

Build Quality​

The QT-X feels really well built and solid in my hands. Rose Technics used medical grade 3D printing for the shells and gave them a sprayed finish with this stunning starry night sky paint. I went with the blue one, and it really stands out with a nice shimmer. Even though the build feels durable, it is not heavy at all, and you can tell they put a lot of care into every detail.
One thing that I personally don't really like about the build is the brass nozzles, they look rather cheap compared to regular stainless steel or aluminum nozzles.

Ergonomics & Design​

Now, the fit, I gotta be honest, it's not as comfortable for me as the QT9 MK3. The QT-X is a bit bigger and the nozzle is longer, which was not ideal for me. But, with the smallest eartips included in the box, I managed to get an okay fit. When they are in right, they seal pretty well and block out external noise, which is definitely an important thing in order to not lose the bass. After trying some other tips, I found that the Spinfit W1 tips worked best for me, but there are lots of options to try out.

Driver Configuration​

Inside, the QT-X has a hybrid setup with one dynamic driver for the bass and six balanced armature drivers handling the mids and highs. This combo brings detailed sound without losing any warmth or musicality, and they have done an amazing job in the crossover section, that's for sure. Everything comes through clearly, though it doesn’t sound overly analytical, but it is still enjoyable and musical.

Materials Used​

The shells are made from lightweight, medical grade resin, so they are strong but don’t feel heavy. The night sky paint is a really nice touch, and it gives it a premium look that stands out from more basic designs, and to be honest, from many other IEMs.

Cable​

The Grey Rose Pro cable included with the Value Edition is a 4 braided 8 core 5N single crystal copper wire with a braided mesh outer layer. It feels sturdy but is still flexible enough to be comfortable to use. The cable, although it looks pretty premium, I actually don't like braided mesh cable, as they tend to lose their good look, and the cable, with friction, will become hairy and not good looking...

Sound Performance​

Bass​

The bass on the QT-X is fast and deep, with a nice rumble. It's definitely present but not overwhelmingly bass heavy compared to some other IEMs I’ve tried. Because the mids are a bit scooped out, the bass feels more pronounced in the mix. The sub bass goes deep, and it gives a good sense of weight to tracks without overpowering the rest of the sound. It's tight and well controlled, which keeps everything from getting muddy, especially on faster or bass heavy genres.

Mids​

The mids are where the QT-X feels a bit recessed. They are a bit scooped out, which can make some instruments or vocals feel like they are sitting a little further back in the mix. Despite this, the mids are clear and detailed but definitely don’t steal the spotlight. It’s part of that V-shaped tuning, where the bass and upper frequencies take more of the attention.

Highs​

The upper mids are where the QT-X gets more lively. They are pushed forward, and there’s a sparkle in this range that really brings out details. Sometimes, depending on the track, this can get a little sharp, so it might not be for everyone, especially if you are sensitive to higher frequencies. The treble is detailed but rolls off earlier than I would have liked. I think it could extend a bit more to give more air and openness, but it’s not harsh or overly bright.

Vocals​

Male vocals come through really well warm and full. Female vocals, though, can sometimes feel a bit veiled. They don’t sound bad by any means, but there’s a slight sense of them being pulled back, especially compared to the more forward highs and bass. Overall, vocals are clean and have nice body, but I think they could have been a touch clearer for female singers.

Technicalities​

Details​

The QT-X does a good job at bringing out finer details in the music, though it’s not the most detailed IEM I’ve tried. There’s a decent amount of clarity and texture, but sometimes it feels like there’s more that could be revealed, especially in the mids.

Soundstage​

The soundstage on the QT-X is pretty average. It’s not super wide, but it doesn’t feel closed off either. It gives a decent sense of space but doesn’t reach that “out of your head” level that some IEMs can.

Imaging​

Imaging is solid, and I can easily tell where different sounds are coming from in the mix. It’s accurate enough that I never lose track of instruments or effects, even in busy or complex tracks.

Layering​

Layering is one of the strong suits here. The QT-X does a great job of separating different elements in the music, so nothing gets too congested. Even when there’s a lot going on, I can still pick out individual layers clearly, which makes for an enjoyable listening experience with more complex genres.

Overall, it brings a lively, fun sound with good technical performance, even if it’s not perfect in every area.

Pairing it with the included Dongle​

The RZ-300M dongle DAC that comes with the QT-X has some decent specs. It’s equipped with the CS4398 chip, supports 24-bit audio, and has a 75mW output. The signal-to-noise ratio goes up to 110dB, and it handles PCM up to 192kHz, so on paper, it looks pretty good.

But honestly, I didn’t really love the sound quality when pairing it with the QT-X. It’s definitely a step up from a regular phone’s headphone jack, but I found that it made the QT-X sound a lot warmer and more muffled than I’d like. The overall sound felt less balanced, and there was a noticeable background hiss, which was kind of annoying. It’s not the cleanest sound, and for me, it took away some of the clarity that the QT-X is capable of.

I would definitely recommend using a different dongle if you have one, but if not, the RZ-300M is nice to have in order to get started right out of the box.

Quick comparisons​

QT-X (340$) vs. CVJ Bidong (189$)​

The CVJ Bidong and QT-X both use a similar driver setup of 1DD and 6BAs, but the Bidong costs two thirds of the price of the QT-X, so I was very curious to see how they compare.

Right away, I noticed the QT-X has less bass compared to the Bidong. The Bidong's bass is fun and punchy but can get muddy, while the QT-X has faster, more controlled bass that doesn’t overpower the mids as much as the Bidong does.

In the mids, the QT-X is definitely more refined and detailed. The Bidong’s mids are a bit lacking in the lower range, and while it has a focus on the upper mids, it still doesn’t have the same clarity as the QT-X. The highs on both are close, but the QT-X is more controlled, but they both can get harsh sometimes.

Technically, the QT-X is far superior. It has better imaging, layering, and overall clarity. The Bidong is fun but lacks that refinement and precision that the QT-X gives.

QT-X (340$) vs. QT9 Mk3 (priced dropped a bit now from 185$ to 165$)​

Comparing the QT-X to the QT9 Mk3, both have similar bass with good depth and control. I suspect they might even share the same dynamic driver, but I can’t confirm. The difference comes in the mids, where the QT9 Mk3 is much more balanced and natural, while the QT-X has a scooped, V-shaped sound, making it more fun but less balanced.

The highs on the QT-X are a bit more forward and lively, but they as well roll off a bit too soon for me. The QT9 Mk3 has a bit smoother and more laid back treble, which I prefer for longer listening.

In terms of technicalities, the QT-X has slightly better resolution and precision, but because of that, the QT9 Mk3 offers a wider soundstage, which gives the music more space. Comfort wise, for me, the QT9 Mk3 wins hands down, as it’s much smaller and easy to wear for long periods, while the QT-X is bigger and for me not as comfortable.

Final Thoughts​

QT-X has better technicalities and a more fun, V-shaped sound.
CVJ Bidong is very V-shaped with punchy bass but lacks in the mid range and in technicalities compared to the other two.
QT9 Mk3 is more balanced, natural, and comfortable but not as exciting or technical as the QT-X.
It depends on what you are after. Fun and technical performance (QT-X), balance and comfort (QT9 Mk3), or a very V-shaped option with strong bass (Bidong).
But if I had to pick, I personally would choose the QT9 Mk3, as I think that it is a better value package overall.

Conclusion ​

Overall, I think that the QT-X is a solid pair of IEMs, especially if you want a more fun and V-shaped sound. I really loved the bass here, as it is fast, deep, and punchy without being too much and without muddying the mids, and the highs are sparkly and forward, though they do roll off a bit early for my taste. The mids are a bit scooped, but the clarity and detail in the sound are impressive. I really appreciate the great imaging and layering, which make complex tracks sound clear and well separated.

While the QT-X isn't the most comfortable IEM for me because of its size and longer nozzle, I still got a decent fit with the small foam eartips. The build quality is great, and the design is absolutely gorgeous, as this is definitely one of the most beautiful sets I have owned. I only wish that the packaging was less messy and a bit less bulky.

Can I recommend the QT-X? I would say yes, but not for everyone. If you are looking for a fun sound IEM with good technicalities and you don't mind the size, then the QT-X is a good option. However, if you prefer a more balanced sound and you have small ears, there may be better options available, such as the QT9 Mk3.


Where to buy: (Non-affiliated! None of my reviews use affiliated links!)

Rose Technics Official Store

Rose Technics QT-X Review: THE X FACTOR​

PROS:​

• Insane technical ability for the price
• Amazing unboxing and accessories
• Superb value overall
• Vibrant vocal presentation
• Clean separation, layering and headstage
• Crisp overall sound
• Stunning looks

CONS:​

• Occasionally lean midrange
• Somewhat awkward fit
• Potentially overly forward upper mids and treble
• Lacking low end impact
• Metallic timbre
• Stock cable is stiff and microphonic

WHO THIS UNIT IS FOR:​

• Treble and vocal lovers
• People who love a technical-focused IEMs
• People who like an open sounding IEM

WHO THIS UNIT ISN’T FOR:​

• Treble and shout sensitives
• People who want a more musical and engaging sounding IEM
• People who have small ears

RECOMMENDED GENRES:​

• Vocal Pop
• Instrumentals
• Classical
• Live Recordings

SHORT REVIEW:​

Rose Technics’ flagship doesn’t disappoint as long as you’re familiar and enjoy their tuning style. The QT-X is their most technically capable, most detailed and most refined IEM that I’ve tried with looks and unboxing to compliment. It’s not going to satisfy every user with its aggressive tuning and overly technical sound, but it’s one to compel tech and treble lovers. RECOMMENDED WITH CAVEATS!

FULL REVIEW:​

In the height of the hybrid wars, companies try to find ways to stand out from the competition. Whether it’d be through better tuning, accessories or aesthetics, the current state of the market means that there’s something for everyone.

Rose Technics, in my opinion, has got to be one of the companies to look for if you want just pure value in their package. So with the QT-X being priced at $339 for the value pack and $439 for the deluxe, is this notion still true?

The QT To Rule Them All​

The QT series have spanned a couple of years with the QT9 series. I previously reviewed the QT9 MK3 and found that, despite its imperfections, it is a compelling hybrid for the price with its impeccable technicalities and insane value.

The QT-X is one of their newer sets released early 2024 and is also one of their most expensive sets to date. $339 for the value version which features the RZ-300m dongle DAC and Grey Rose Cable and the Deluxe featuring the RS3039 DAC with the Blue Rose Pro Cord. This set features a single dynamic driver and 6 balanced armatures, a rather dated driver configuration for the price. Let’s find out how well this hybrid performs in 2025.

UNBOXING:​

If you read or watched my review on the QT9 MK3, you know how bountiful the unboxing experience that Rose Technics provides. The same can be said about the QT-X as it features almost exactly the same level of an unboxing experience from start to finish.

HERE’S A FULL LIST OF ACCESSORIES (DELUXE):

• IEMs
• Cable
• Foam eartips
• Replacement Filters
• Wide Bore Eartips
• RZ-550 DAC
• USB Type C to Type C
• Case
• Paperwork

It’s not hard to think that Rose Technics is pushing the value proposition of their products by including a freaking dongle DAC on top of an already amazing set of accessories. If you’re someone who’s new to audio, it’d be a crime not to recommend a Rose Technics product with just how bountiful the unboxing experience is.



The dongle that comes with the DAC is a particular highlight as this is a $70 DAC with the ES9039 DAC chip. It’s a genuinely good DAC that, unfortunately, doesn’t really fit the tuning of the QT-X as it’s a more analytical DAC than musical.



The eartips that come with the package are also pretty good, albeit hit or miss fit wise.

However, the QT-X having the exact same unboxing experience as the QT9 MK3 does make you wonder whether it really is even worth paying twice as much for the same level of accessories.

BUILD & FIT​

Thankfully, the IEMs themselves justify that already. Bearing either a purple, white blue or a funky grey color with a completely different shell, the QT-X has got to be one of the most stunning IEMs I’ve seen.



I chose the purple variant, although I was genuinely considering the platinum silver as it looked way too clean. The overall look just screams beauty no matter how you look at it.

However, don’t expect this to be a premium feeling IEM whatsoever. It’s a full resin build with clean lines and a very solid shape, but one that doesn’t really feel that premium to hold.



An issue that some people might have with this IEM is its rather odd fitting. Normally, IEMs with contoured shape and aggressive wings allow for a solid seal and stability. However, probably due to the odd stubby nozzle, the fit isn’t the most comfortable nor the most stable.



I’ve been vocal about the Blue Rose Pro Cord as not being a very nice cable due to how stiff and microphonic it is and my opinions have not only not changed, but also exemplified due to the nature of the QT-X. Somehow, the cable amplifies not only the sound when it rubs on my shirt, but also when wind blows onto the earpieces and makes this really annoying sound. Other than that, the interface is pretty good and the chin cinch is very effective.

SOUND​

Sound Signature​

The QT-X features a rather aggressive V-Shaped sound signature with emphasis on the upper mids and low treble. Hard V-Shaped sets are rare in the upper price bracket, but one that I get excited for whenever I hear them because the sound is either absolutely dog wash or the best V-Shaped tuning you’ll ever hear. The QT-X falls in the middle as the aggression in the treble both works for and against it. The biggest issue would be the timbre being clearly catered for techs than naturality.

Drivability​

The QT-X is a very easy to drive IEM with decent scaling, but nothing that will require you to deck out more than the included 9039 DAC. I do prefer a warmer/darker DAC to pair with the QT-X if you’re sensitive to higher frequencies.

Volume Scaling​

Due to the overcooked upper mids, the QT-X is a fine low to mid volume IEM as the vocals take center stage over the treble and the bass. It’s not an overly emphasized presentation, but it’s one that you’ll notice once you crank the volume knob

Listening Experience​

After my first listening experience with the QT-X, I knew exactly what albums I wanted to listen to on it. Laufey’s Everything I Know About Love and Young Gun Silver’s Canons. One that I know it’ll excel in and another that I know it wouldn’t.

I want to start with Laufey’s first. This album is one that I’ve always felt benefited from a brighter, more v-shaped IEMs. Laufey’s naturally low contralto vocals paired with the warmer overall mix makes pairing brighter IEMs a treat. The QT-X did NOT disappoint in this regard as hearing Laufey’s smooth and lush vocals while keeping a good level of clarity and detail in the top end is the dream while listening to this relaxing album. Normally, brighter IEMs don’t usually bring a relaxing sound, but the QT-X and Laufey pairing is some of the best I’ve heard for this price. Unlike its little brother the QT9 MK3, the QT-X has more low end emphasis to bring out the bass guitars in tracks like Valentine which is essential in making the overall experience full. Top this with the insane technical ability of the QT-X and you get a genuinely amazing listening experience.

On the other hand, Canyon’s emphasizes why you might not consider this IEM. First, bass tactility is lackluster. This could be the DD not really catching up to the BAs in the QT-X, but the bass genuinely just sounds less nuanced than I like. A track like Kids is just not hitting as hard as I like. Additionally, the emphasis on the upper mids also emphasizes the coherence issue of the QT-X as some of the vocals and instruments just sound so metallic. This is particularly evident in tracks like Who Needs Words with the cymbals just sounding so plasticky. Additionally, the upper treble emphasis also lacks luster which gives the IEM a very slightly unresolving tone due to the emphasis in the upper mids and the glide in the upper treble. It’s not horrible by any means, but it just makes the IEM sound a bit less capable than it usually is.

Regardless, this is an IEM that excels in tracks with a lot of layers and fantastic mixing as it really emphasizes those good qualities really well. Listening to Sky COTL Vol.1 by Vincent Diamante really puts you in the environment. I personally listened to the songs individually and during the game and never have I felt more immersed listening to a game’s soundtrack more than I did with the QT-X. Unfortunately, the fit does give me a bit of issues over long listening periods and the cable genuinely pisses me off anytime I move my head around. Regardless, this is a technically impressive set for the price with a beautiful emphasis on the midrange.

COMPARISONS:​

vs Rose Technics QT9 MK3​

Accessories aside, the QT9 MK3 is a step down from the QT-X in not only tuning but also coherency. While the QT9 MK3’s whole identity is that it’s an insanely technical hybrid for the price, the QT-X has a far more versatile tuning with a bigger bass and less cooked treble that makes it a genuinely smooth listening experience for most. However, both sets are still on the spectrum of upper mids focused and is not for the shout and treble sensitives.

vs Dunu DK3001BD​

Compared to the bright goat, the QT-X interesting has worse timbre and less nimble bass response. What it has in return is a more open headstage and a stronger vocal emphasis that can satisfy both lower and upper mids enjoyers. The DK3001BD is still the more technical, more detailed and more nuanced IEM with better extension on both ends.

vs Yanyin Canon II​

While it may seem counter intuitive, the Canon II is the other side of the hybrid coin where it tries to be musical and rich in tone while the QT-X is trying to be more technical and vocal centric. I think that these two IEMs are complementary and not necessarily under the same market of preference as the Canon II’s strengths and weaknesses complement the QT-X. Canon II has a far more tactile, rich and relaxed tone which sacrifices technicalities and details while the QT-X has a lot of mid and treble energy which focuses your attention on the small details.

vs Moritz Paradise​

Initially, I thought that these two IEMs would be much closer to each other in terms of tuning. The QT-X is an upper mids heavy IEM with decent bass and a scooped mids, similar to the Moritz Paradise’s V-Shaped, upper mids heavy and big bass sound. However, the listening experience is very different considering the level of vocal emphasis on the QT-X and how lean the bass is compared to Paradise. The one thing both IEMs have is the incoherency issue, but the Paradise somehow mitigates that thanks to its bigger bass masking the treble a bit. However, this makes the QT-X a slightly cleaner sounding IEM overall. Between the two, the Paradise is a more engaging, fun and exciting set to listen to while the QT-X is a more vocal, technical and analytical sounding set

vs Simgot EA1000​

I have to compare it to the vocal GOAT as the QT-X aims to compete against other brighter and vocal centric IEMs. The EA1000 is, in my opinion, the more coherent and more balanced set while the QT-X has a far larger headstage. Interestingly, the EA1000 has a deeper depth, potentially due to that passive radiator that gives it a more immersive listening experience. Additionally, the bass tactility is league between the two and the EA1000 is still one of the best IEMs under $500 to do bass (other than the EA2000, of course).

CONCLUSION:​

To some extent, the QT-X isn’t as good of a value as the QT9 MK3 is. For twice the price, you get the same accessories and a similar sound signature.

However, going deeper, you see what makes the QT-X stand out not only against the QT9 MK3 but also against other hybrids. Not a lot of hybrids do this upper-mids focused v-shaped sound signature that somehow doesn’t sacrifice note weight and vocal clarity as much. It’s such an immersive listening experience with its impeccable technical ability and crisp overall tone.

While the timbre issue and bass nuance not being as refined came to me as a bit of a downer, I can’t deny that the QT-X is a fantastic hybrid for tech and vocal lovers. I haven’t heard one like it and it’s something to consider if you’re specifically looking for this.

Thank you for reading my full review on the Rose Technics QT-X. If you would like to order one, consider using the non-affiliated link below:
https://rosetechnics.com/products/qtx-hifi-hybrid-wired-headphones-1dd-6ba-iem-ess-9039q2m

WATCH REVIEW HERE:​

Introduction​

The Rose Technics QT-X is a premium IEM featuring a hybrid driver configuration with one dynamic driver and six balanced armatures. Recognizing the importance of a complete audio system, Rose Technics offers the QT-X in two distinct bundles.

The $340 “Value Edition” provides a compelling entry point, pairing the IEM with the RZ-300m single-ended DAC and the Grey Rose cable with 3.5 mm termination. For those seeking the ultimate listening experience, the $440 “Deluxe Edition” elevates the package with the inclusion of the high-performance RS9039 DAC and the premium Blue Rose Pro cable featuring a 4.4 mm termination.

Package Contents​

• The Earpieces
• Blue Rose Pro 4.4 mm Cable for Deluxe Edition & Grey Rose 3.5 mm Cable for Value Edition
• RS9039 DAC for Deluxe Edition & RZ-300m DAC for Value Edition
• A Small C to C Cable
• Four Pairs of Wide Bore Ear Tips & Four Pairs of Foam Tips
• Four Pairs of Extra Nozzle Filters
• A Leather Carrying Case
• Paperworks

Specifications​

• Drivers: 6x BA, 1x DD
• Impedance: 18 Ω
• Sensitivity: 108 dB
• Frequency Response Range: 20~20000 Hz
• Connector Type: 0.78 mm 2-pin
• Interface Type: 3.5 mm/ 4.4 mm
• Cable Length: 120 cm
• Weight: 30g ± 3g

Driver Configuration​

• Balanced Armature Drivers: 2x 30018, 2x 29689, 2x 30019
• Dynamic Driver: 1x 10 mm LCP Tesla Diaphragm

Build & Design​

The Rose Technics QT-X? She's a beauty, I'm telling you. Firstly, the very moment you see it-you go, “Wow.” They come in four colours, but I got the “Starry Blue,” and boy, it sure looks amazing. This gradient on the resin shell looks very much like a slice of the night sky. And then, that small “angry face” logo? Kind of quirky, and gives it this fun, you know, kind of rebellious vibe, which makes it stand out even more.


Now, the build quality? It is solid. You can really tell they put in work to make it feel premium. Sure, there is a tiny gap between the shell and the faceplate, but honestly? Who cares. It still looks and feels top-notch, something that one would want to show to people. Worth it.

Cable​

The Grey Rose cable is honestly great. The braided design feels super tough, like it’s made to last forever, and the metal Y-split and chin slider just make it look a bit fancy. You’d think it’d cost way more than it actually does. Does it completely change the sound? Not really, but it does what it's supposed to-keep everything clean and clear. No complaints there. It works flawlessly with the QT-X and just completes the whole setup, I feel.

The cable is lightweight and flexible too-no stiffness, no tangles, no hassle. And microphonics? Barely noticeable, which is such a win. Honestly, the entire setup just feels right. It all comes together so perfectly, you can't help but love it.

Fit & Comfort​

Now, about the fit: The QT-X is surprisingly comfortable. I did, at first, think that the shells looked a little bulky, but nope-they're super lightweight and sit perfectly in your ears. Long nozzles and deep fit block out so much noise, and it is almost like being in your own bubble.

Testing Gears​

• Cayin N3 Ultra
• iBasso DX180
• Xduoo X2S
• ddHiFi TC44Pro E2
• Celest CD-20
• Hidizs S8 Pro
• Included RZ-300M

Included RZ-300M DAC​

The RZ-300M DAC is a budget-dongle, which is included in the value-pack of QT-X. It has a non-detachable type-C cable for connection. The DAC has a playback capability of 24bit/192kHz PCM audio quality. Moreover, it is capable of delivering a whopping 75mW power to the QT-X and other IEMs. Now onto its design, it has a purple coloured metallic shell with a 3.5 mm port that has a plastic covering.
The button above the DAC with the Roseselsa logo functions as play/pause button. It can also be used to trigger virtual assistant, skipping tracks, answering or ending calls, which sure is convenient if you don’t want to use your phone. Sound-wise, it leans toward warm side which will pair well with many IEMs. It has no issues running many less demanding IEMs.

Tip-Rolling​

The default stock silicon ear tips fit comfortably. Like many, the foams are not perfect, and the QT-X does very well with tip rolling. A pair of ePro Propeller 01 tips, for example, adds a touch of warmth particularly in the lows and presents more dynamically with a cleaner and more engaging mid-bass. While the Final E-series Clear tips provided a much more extended sound. Most definitely a reason to experiment a lot with ear tips, so that one can get an optimal sound signature out of the QT-X and an optimal fit and comfort.

Sound​

Bass​

The bass on the QT-X? Honestly, it's very satisfying. It has this nice mid-bass punch that is tight and pretty impactful. You can really feel it, but it's not overdone or sloppy—everything feels super controlled, and you can hear all the little details, which adds so much energy to the sound. It's the type of bass that makes your foot tap, but not so much that it overpowers the rest of the song. Really, it is just the right amount.

Sub-Bass​

The sub-bass performance of the QT-X is good. It has an excellent extension and depth. The sub-bass is well-controlled, which makes the listening really enjoyable. The roll off is pretty good and helps by giving an immersive atmosphere. While it may not produce an earth-shattering impact that some bass heads would crave, but the sub-bass provides a sufficient level of impact and depth. Moreover, there is some sub-bass bleeding into the mid-range, thus relaying some warmth to the vocals.

Mid-Bass​

The mid-bass on the QT-X is probably its strongest point: it does sound tight and punchy and really hits with quite a lot of impact to fill the sound with lots of energy without being harsh in any way. Quick and controlled enough to handle even the most complicated of tracks, it still keeps everything adequately precise and clear—really impressive.
You get that warm, natural sound, but still, it keeps things clean and balanced. Moreover, the mid-bass is very tactile and impactful, while being controlled. It never sounded overly sharp, nor did it sound muddied/bleak.

Mid-Range​

The mid-range on the QT-X? It's excellent. It feels like it's balanced in a way where everything sounds ridiculously engaging. Vocals and instruments come through so clear; nothing seems lost in the mix. It's like you can really hear the details, yet it isn't too bright or done too much. It's smooth and natural, and you just want to keep listening. Feels like everything has its own space to shine. Despite the V-shaped tuning, it does not produce a recessed mid-range.

Male Vocals​

Male vocals sound really nice on the QT-X: full-bodied, a bit warm, focused and has some air to it, but not a lot. They are clean and detailed, with just the right amount of texture, so it really feels alive. Timbre is nice and well-defined, which adds so much to the richness of the voice. Moreover, the vocal representation is articulate and engaging.

You can even pick up on the faintest little nuances, which make it feel so personal, like the singer is right there with you. And the vocals are set just a little forward in the mix, really prominent. You can feel this natural grit and intimacy that really captures the soul of the performance.

Female Vocals​

Female vocals are clean, warm, and smooth. Moreover, it is energetic, lively, and expressive. They have a touch of intimacy, which makes the listening experience engaging. Furthermore, no sibilance was found during the testing period, which is a huge plus point.

The vocals sound clear, airy, and carries a natural tone, which pulls out an impressive amount of intimacy in the female artist's voice. Moreover, it does not sound recessed despite having a V-shaped tuning. Female vocals sounded extremely nice and charming to listen to on the QT-X. However, in some tracks the vocals sound a little thin and lacked a bit of weight, but this is very rare.

Moreover, the instruments are clean and has good separation. It was able to keep up even on complex tracks. Instruments are focused, but it never outshines the vocals.

Treble​

The treble is an energetic and detailed one. It extends smoothly with excellent air and sparkle. Moreover, it was not fatiguing even as a treble-sensitive listener. The lower treble is well-controlled, while the upper treble adds a touch of shimmer. It handles aggressive tracks with impressive control, showcasing its energetic treble without excessive sibilance. The cymbals and hi-hats sound crisp and sparkly, without a hint of smudginess.

Soundstage & Imaging​

The soundstage on the QT-X is pretty average. The airy treble helps a lot with creating a sense of space, so you can easily pick out where the instruments are placed around you. It’s not the most immersive, though—there’s not much depth, and it doesn’t quite feel like the sound is coming from outside your head. But still, you get a decent sense of separation and dimensionality.

When it comes to imaging, the QT-X really shines. The instrument placement is spot on, super accurate, so it’s easy to tell where each element is in the mix. The layering’s pretty average, though, except when it comes to the bass. The bass feels like it has a bit more presence and definition in the overall picture.

Notes​

It is very important to remember that poorly mastered tracks will produce sibilance in the vocal regions, and the treble can slowly render fatigue for treble-sensitive listeners.

Conclusion​

The QT-X gives off an engaging listening experience. The bass is impactful and well-controlled, while the mid-range is balanced and detailed. The treble is energetic and detailed, though some may find it slightly bright on poorly mastered tracks. Moreover, its instruments are well-separated and has accurate imaging. However, the soundstage lacks some depth, it still provides a spacious and enjoyable listening experience.

Intro

This is Roseselsa's (Rosetechnics) flagship In ear monitor called QTX. A 1 DD + 6 BA setup a definitely upgrade from their previous iem line up i can admit these gear can take your listening experience to the next level with its impressive clarity and excellent technical performance.





Disclaimer

I would like to thank Roseselsa for arranging the QTX for evaluations. My opinions are unbiased, and I haven't been influenced or instructed to praise these IEMs. Every detail in this review is actual experience made by listening for hours everyday.





Specification

Balanced Armature Drivers
30018 x 2, 29689 x 2, 30019 x 2

Dynamic Driver
10mm LCP japanese tesla diaphragm

Impedance
18 Ω

Sensitivity
108 dB

Frequency Response Range
20 - 20000 Hz

Connector Type
0.78 2 pin

Interface Type
3.5 mm/ 4.4mm

Cable Length
120 cm

Weight
30g ± 3g





Packaging

Value Pack

Pair of Rosetechnics QTX
Grey Rose Cable choice of 3.5mm/4.4mm
RZ-300m portable DAC
Carrying case
Sets of eartips

I recommend to upgrade to Deluxe pack because it have better cable and better DAC/AMP Pairing.





Build and Comfort

A well built in ear monitor made from solid shiny and glittery resin and the faceplate have a Artistic X design on it, but still be careful to not to drop these it can made a scratch to the faceplate. As for the comfort, the long nozzle will not fit to some and I recommend to use atleast one size smaller eartips for comfortable fit.


Drivability

The QTX is easy to drive even using weak sources like smartphone. When I burning in these gear I change the cable to 3.5mm and the result is surprising good even in 3.5mm termination but still lacking in dynamics. The 4.4mm still the best choice (4VRMS) using the QTX it gives a spacious soundstage and grand presentation.





Sound Aspects


Source used :

IQOO Neo 9s Pro (Smartphone)
Onix Alpha XI1 (Portable Dac Amp)
Fosi Audio SK02 (Portable Dac Amp)
Fosi Audio ZD3 (Dac Preamp)
Boaleco PX2 (Tube Amplifier)


The QTX is a Versatile V shaped sound signature you wanna know why I say this is versatile? It can play any genre and it response well to every cable and every source you use with it due to its transparent sonics.

For example I paired these with Astral Acoustics Voyager (Cable) and Onix Alpha which enhances the mid capabilities of an iem. The result is super smooth and warm and when paired with CVJ candy cable and SK02 the result is super vivid and energetic presentation.


Bass

This is the star of the show. It exhibits powerful, textured, deep, nuanced and meaty slam and still retaining that clean attack. The subbass can go thunderous rumble based on the tracks is playing. I'm not a basshead but I think basshead out there will love these for sure.


Mids

Out the box to be honest the mids is quite recessed, lacking fundamental quality and after 100hrs of burn in. The mids delivers a transparent, smooth and clean. The vocals is airy, well bodied and expressive, it is very well presented and detailed. The uppermids is slightly boosted to compeer with the lows but it is not offensive perhaps it shows engaging and musical presentation.


Treble

The treble is rendered with precision, unoffensive and pleasing. Even though it lacks energy and excitement but the extension on these is impressive. Everything got better after that 100 hours burn in and now, it is airy, sparkly and have great note weight. You can listen to these for hours without fatigue.


Technicalities

These lacks technical prowess if these powered by a weaker sources and by giving these ample power it exhibits a wide, spacious soundstage, stellar imaging, layering and detailing. The accurate placements and separation of instruments is impressive as well as macro and micro details is well portrayed in the presentation. I can simply say everything on the technical capability of QTX is superb.





Conclusion

The QTX is one of the example that will take your listening experience to another level with its exceptional bass response and technical performance. The glittery body and faceplate is an eye catching design. I can admit this is the best technical I heard under 400 USD, this is not only technical but also musical at the same time. Pairing this with decent/powerful source will give you a grand musical presentation.



Non affiliated link below :
https://rosetechnics.com/products/q...PLJg0reGGyNS-TWYbrRGyZXYQHadgFDB5JYTvciIvdXzk

First I would like to thank ROSESELSA for sending this review unit and also to my friends at Sonic Mantra for giving me the opportunity to test it out. This review reflects my honest opinions. I didn’t get influenced or paid by anyone for this review.



The Rose Technics QT-X is a premium offering from the company. The driver configuration is 1 dynamic driver and 6 balanced armatures. It comes as a bundle with DAC included in the package. ROSESELSA offers two different options for the bundle with the difference being in DAC and Cable selection. The $340 ‘Value Edition’ comes with their RZ-300m single ended DAC and Grey Rose Cable with 3.5mm termination and the $440 ‘Deluxe Edition’ comes with RS9039 DAC and Blue Rose Pro cable which comes with 4.4mm termination.


Package Contents:

1. The earpieces
2. Blue Rose Pro 4.4mm cable for Deluxe Edition & Grey Rose 3.5mm Cable for Value Edition
3. RS9039 DAC for Deluxe Edition & RZ-300m DAC for Value Edition
4. A small C to C cable
5. Four pairs of wide bore ear tips & four pairs of foam tips
6. Four pairs of extra nozzle filters
7. A leather carrying case
8. Paperworks

Unboxing experience is pretty good. Bunch of accessories in the package that gives off a premium vibe. I have the Value Edition here. Upon sliding open the upper sleeve, the main box opens up like a book. everything is organized in a way that gives a sleek look to the inner packaging.


The Rose Technics QT-X looks absolutely fabulous. It comes in four color choices- purple, white, blue and a grey metal color wavy patterned faceplate. I have the Starry Blue color. The whole shell has a sparkly resin build which is of high quality. The faceplate has more white sparkles and follows a gradient patterned light to dark color tone which actually looks like a starry sky. The angry face like logo makes it the cutest angry looking IEM! The 2pin connector protrudes out a bit from the surface and there is an air vent right next to it which is a clever design choice. One question that kept coming to mind is why there’s a gap between the shell and the faceplate. They could’ve just made it fully flush. But that’s not that big of an issue. Design and build quality wise it is top notch and oozes premiumness.


The Grey Rose is a 4 core braided 3.5mm cable which also feels premium. It has a unique metal Y-split design with Rose Technics branding. The chin slider is also made of metal which works great. Sound wise it doesn’t disappoint either but does nothing out of ordinary to be mentioned here. But it sure does complement the QT-X well in both looks and sound.


The IEM Storage case is coated with leather which gives it a premium feel. It can store the IEM and the cable with some ear tips in the pocket but can't store a DAC with the confined space inside the case.

The shells are bulky with a custom in-ear like design and a very long nozzle. Despite the bulky design it still fits pretty comfortably but not the best at that. Isolation is very good due to deep fit. The user might have to go down a size with ear tip to get a proper fit due to its deep insertion fit. With the soft stock ear tips it fits pretty comfortably. As the shells are made of resin, they are pretty light. I didn’t find any discomfort issue even with long listening sessions. The cable is soft and behaves well. It doesn’t have any memory and is easy to handle. I didn’t find any microphonics issue despite it being a paracord braided cable. It’s pretty light weight as well.




The RZ-300m is a budget dongle DAC that has a fixed braided type-C cable. It is a single ended DAC that can deliver upto 75mW of power output. It supports upto 24bit/192kHz PCM playback. The outer shell is deep purple colored metal but the bottom where the 3.5mm port has cheap plastic covering which gives away that it’s a basic budget product. It has a button which functions as play/pause button. It can also be used to trigger virtual assistant, skipping tracks, answering or ending calls and such which is convenient if you don’t want to wake the screen of your phone. Sound wise it leans toward warm side which will pair well with many IEMs. It has no issues running many less demanding IEMs.



The QT-X has a V-shaped tuning with prominent instruments and vibrant mid-range. The bass and treble performance has the main highlight in this set. The mid-range doesn't fall short at all. Let's break it down.

• Bass:
  The QT-X absolutely nails it with the bass performance. The sub-bass presence is not as prominent but it doesn’t go all out on that. The extension and rumble is decent. It gives a clean presentation with sub-bass. The roll off is pretty good and helps by giving an immersive atmosphere which can be felt in tracks like “End of The Abyss - Alaksei Yukhnevich”. It is fast and clear with the sub-bass but doesn’t go as deep to make it sound big.
  
  Mid-bass performance is up a notch. It excels here with tight and impactful hits. The textured and detailed mid-bass is its strong point. It shows good control over the mid-bass and is pretty fast to keep up with busy tracks without seeming like it’s struggling. Again the clarity and precision is very good. The layering in the bass region is amazing. It follows pretty accurate timbre without much coloration. It actually delivers more bass than what the graph shows. The sub-bass follows in and gives very good support to mid-bass that makes for an amazing overall bass performance. While the bass may not be at the level where it can satisfy bass-heads but surely it will be enough for plenty bass lovers.

• Mid-range:
  The mid-range is pretty forward and isn’t as much recessed despite having a V-shaped tuning. It has good body and note-weight. the fuller and articulate vocals deliver a detailed presentation. The upper mid-range is pretty upfront. The male vocals sound fuller and has decent weight. they sound natural. Vocals are well textured and is articulate. The lively vocals make for an engaging experience. Female vocals are lively and energetic. The energy is well under check and doesn’t go berserk with the upfront upper mid-range. While there’s no such peaks that makes it unbearable still the upper mid-range energy sometimes sounds overwhelming, especially in busier tracks. The mid-range energy is pretty tasteful for instruments. The prominent instrument sound makes the vocals fall behind.

• Treble:
  The treble is detailed, airy, and energetic, giving the QT-X an engaging and lively character. Extension is excellent, though it may become fatiguing for treble-sensitive listeners. It sounds crisp with cymbals, hi-hats and so on. The lower treble is energetic and detailed while maintaining a clean presentation and natural tone. The energetic treble doesn’t exhibit sibilance in most occasions and sounds amazing with aggressive tracks. But with poorly mastered tracks the treble is too edgy. The upper treble is airy and has good amount of sparkle. The treble performance is worth the praise as it shows pretty good control over the energy, and doesn’t break the barrier with tracks from artists like “Sleep Token”. Treble performance is another strength of the QT-X.

• Technical Performance:
  The technical performance is pretty good with one or two short comings. The QT-X offers good width in sound stage but height and depth is just average. It sounds somewhat intimate in terms of holographic experience. Imaging is pretty good with great precision. The instrument placements are accurate and layering is average with the exception in bass region. The QT-X provides excellent detail retrieval, especially in the mids and treble. Micro details are clearly rendered, making it a solid choice for analytical listening. Dynamic range is solid as well with sufficient contrast between soft and loud passages lending an engaging quality to dynamic tracks

The stock silicon ear tips are very soft and provides a good fit. The included foam tips aren’t that great. Sound experience can be enhanced with after-market ear tips like ePro Propeller. It provides a dynamic sound with clean and engaging mid-bass and mid-range. I felt like it even adds a bit of warmth, especially in the lows. The Final E-series Clear tips provide a tighter and more extended experience. ePro EP00 horn shaped ear tips gives the sub-bass more depth and makes the mid-range clearer. I used the ePro Propeller with the QT-X most of the time as it was better suited for me. Wide bore ear tips like Divinus Velvet wide bore and TRI Clarion helps with the sound stage opening up a bit more.


For source, it was tricky. The included DAC in the "Value Ediition" bundle is a budget effort which does pair good with the IEM, but leaves with room for improvement. The IEM was quite picky with source as with some of the DACs I tried it with, it sounded leaner and couldn’t unlock the full potential of the IEM. It paired well with warm-neutral and musical sources like ddHIFI TC44Pro E2, Xduoo XD05 Basic and such.


The Rose Technics QT-X impresses with its detailed punchy bass, vibrant treble. It delivers pretty good mid-range performance despite having a V-shaped tuning. The gorgeous and cute design, premium build and accessories, bundled DAC makes it a good value package. The stage may be average but it still impresses with other technical aspects. Although it may not stand out in the crowded market at its price point, it does provide a decent bundle. For those who likes vibrant V-shaped sound in a premium IEM and doesn’t want to go through the hassle of finding a better source, this can be a solid option.

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Disclaimer:

• - I don’t read FR graphs. I only use my ears, as earphones should be used.
• - Roseselsa/Rose Technics sent this unit to me in an exchange for an honest, independent review. Rest assured that this review will do its best to devoid from any bias/es as much as possible.
• - The following remarks and observations shall be made and owned only by me.
• - No monetary compensation is/was involved before, during, and after the period of creation of this review.
• - Your mileage may (and always, will) vary.

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Burn-in time: 4-8 hours per day, 5 days.

Source/s used:

• - Non-HiFi smartphone (Infinix Note 12 G96), PC.
• - Tanchjim Space DAC
• - Fosi Audio SK02 USB DAC
• - Kiwi Ears Allegro Mini DAC
• - Rose Technics RS9039 USB DAC
• - Aiwa XP-V710C CD Player (12 sec. EASS)
• - Sony Xperia X Compact
• - Local Files via Foobar, YouTube Music, Deezer, and Qobuz with UAPP.

IEM/Earbud/Setup configuration: Stock medium eartips, any form of EQ or MSEB off, 40-60% volume.
========================================================================
Sound signature:

• The Rose Technics QT-X exhibits a well-tuned, warm-v-shaped sound signature. On certain pairings and ears, it may sound as a warm-balanced set, or a u-shaped bright sounding IEM.

Lows:

• Bassheads at heart may like how the bass render here on the QT-X. While it may not have the ear-shaking, sloppy bass quantity, it instead presents itself in a clean, thick, detailed manner. The bass is mildly subbass dominant, neatly rendered, and only shows when the track calls for it. This IEM, particularly this type of bass response, will definitely make my 16 year old basshead self grinning every time he’ll use this QT-X. Overall, I find the bass of the Rose Technics QT-X well-tuned and does not have any deal breakers nor compromises for its asking price.

Mids:

• As for its mids, it is well-placed, in terms of its presence. It never came across as recessed nor-forward, giving a “balanced” impression. There is a tinge of warmth here as well, but it only made the lower mids a slightly thicker than usual, nothing else. Male vocals and instruments found in this region are thick while still exhibiting above-average amount and quality of detail. Upper mids are mildly elevated, exhibit a very good amount of air, clarity, and sparkle. I am happy to report to everyone that this does not exhibit any form of peaks or harshness. However, this region suffers mild thinness, but only observable when compared with an IEM that has a thicker character in this region. This finding made me confidently say that the mids, particularly on the QT-X, do not have any compromises as well, while delivering a smooth, fatigue-free experience.

Treble:

• As for the treble, it sure is elevated, but not as elevated as its bass, exhibiting smooth yet airy character and extension. Cymbal crashes and splashes here in the QT-X are well-rendered in this IEM, but may come across as “lacking” to some trebleheads, just like its well-controlled, clean bass response to the bassheads. Detail retrieval is above average for its asking price, but definitely is not the most revealing nor analytical I have heard under 500 USD.

Soundstage, Imaging and Separation:

• I am happy and confident to report to anyone the technicalities of the Rose Technics QT-X performs excellently to my standards within its asking price of under 500 USD. Don’t get me wrong, the QT-X itself is not tuned to be an analytical set just like what I have mentioned earlier, but it also means that it did not slouch or had any problems throughout my tests. The soundstage is an immersive, deeper and taller than wide one, which is uncommon in this hobby, in my humble opinion. Separation and layering is well-done and incisively placed. It never had a problem rendering very busy passages. Imaging is dead-on precise and performs really well on competitive games, podcasts, or live concerts.

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Rose Technics RS9039 USB DAC in a nutshell

• This USB is neutral on its own, with a mild added coloration on the upper frequencies. This USB DAC paired with the QT-X gave its upper frequencies added definition, extension, detail, and air. However, this also means that it is also borderline bright when paired with the RS9039.

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Other IEM Comparisons!

Dunu DK3001BD

• The Dunu BrainDance is more neutral, bass-boosted in sound when compared to the Rose Technics QT-X. Both are leaning to the bassier side of the spectrum, but the BrainDance evidently has more bass quantity when compared. Mids are also much more open and less warm on the BrainDance. Treble performance is a bit more extended on the BrainDance, but not by a lot.The QT-X has deeper soundstage, but the BrainDance is noticeably better on the rest of the components, but not by a lot.

Moondrop Variations

• The Moondrop Variations is a more u-shaped, Harman-sounding IEM, while the Rose Technics QTX is the fairly “balanced” sounding out of the two. Bass on the Variations is a bit mellow when compared to the QT-X. Mids are a bit more forward on the Variations and “safer” when compared to the QT-X, at the expense of it being less detailed on the Variations. Both share the same amount of extension on the treble, but the QT-X is noticeably more detailed and less “safe” when compared. As for the technical performance, the Variations is a wider-than-deep type of IEM, while the QT-X aims for a more deeper stage. Separation, layering, and imaging are better on the QT-X, but not by a lot, in my opinion.

Audiosense AQ7 Pro Insight

• The Audiosense AQ7 Pro Insight is a neutral-bright sounding IEM when compared to the Rose Technics QT-X. Its bass is a bit more reserved, punchier, but lacks dynamics when compared. Mids are also less colored, thinner and have mild peaks when compared to the QT-X. Treble exhibits driver timbre on the AQ7 Pro Insight when compared. Technical performance is a bit better on the AQ7 Pro Insight, but not by a lot.

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Pros:

• One of the smoothest yet “non-compromising” IEM in terms of technical performance under 500 USD!
• Versatile, smooth V-shaped sound signature!
• Non-lacking, well-layered and controlled bass response!
• “Well-placed” lush yet detailed bass!
• Non-fatiguing upper frequencies!
• Immersive, precise, technical performance!
• Excellent fit, comfort, and isolation!
• Exquisite overall build quality!
• Quite powerful, well-pairing included USB-DAC!
• Complete, generous quantity and quality of accessories!
• Easy to drive!

Cons:

• Mids, particularly upper mids, may come across as “thin sounding” to some ears.
• Long nozzles can be a problem to some ears (not for me tho)

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Unlike its sibling, the QT9 MK3 wherein presented itself as a beautifully niche IEM in my opinion, the Rose Technics QT-X aimed for a more versatile, easy-going sound character, with excellence in implementation and without any compromises for its asking price in mind. Rose Technics tuned the QT-X so well that I name this as one of the best, well-tuned, V-shaped IEM under 500USD I have heard. Not to mention that its inclusions for its asking price are very generous and delicate from its overall presentation down to its included cable and accessories. The Rose Technics QT-X definitely sends itself to the higher ranks of my personal recommendations list. Remarkable as always, Rose Technics!

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Pairing recommendations:

• Source: The Rose Technics QT-X comes with a USB DAC included, so you should not have any problem with pairing. You may still use your preferred 2VRMS USB DAC.
• Eartips: The eartips included pairs well with this IEM, but you may still use your preferred eartips.
• Cable: The cable speaks premium, despite personally not liking sleeved cables in general myself. You may still use your preferred cable.

Thank you for reading!

Non-affiliated link here: https://rosetechnics.com/products/qtx-hifi-hybrid-wired-headphones-1dd-6ba-iem-ess-9039q2m

Additional Photos Here:

ROSE TECHNICS QT-X

The Rose Technics QT-X is one of Rose Technics (now Roseselsa) newest offering, which is priced significantly higher than their more typical models like the Star City 5 Pro. It features a 1DD + 6BA driver configuration, aimed at competing with IEMs ranging from $400 to $500. One noteworthy aspect of the QT-X is that it includes a DAC in every version available, regardless of whether you choose the Deluxe or Value model.



NOTE

This was sent to my friends over at Sonicmantra.org by Rose Technics for review purposes. Huge thanks to Rose Technics and the Sonic Mantra team. However, these are my honest opinions; I am not being paid or influenced in any way to say anything good or bad.

TESTED WITH

• Cayin RU7
• DDhifi TC44Pro E2
• Onix Alpha XI1
• Rose Technics RS9039
• Rose Technics RZ-300m
• Fiio BTR7

SPECIFICATIONS

• Balanced Armature Drivers: 30018 x 2, 29689 x 2, 30019 x 2
• Dynamic Driver: 10mm LCP tesla diaphragm
• Impedance: 18 Ω
• Sensitivity: 108 dB
• Frequency Response Range: 20 - 20000 Hz
• Connector Type: 0.78 2 pin
• Interface Type: 3.5 mm/ 4.4mm
• Cable Length: 120 cm
• Weight: 30g ± 3g



WHAT'S IN THE BOX

• QT-X Iems
• Blue Rose Pro Cord 4.4mm balanced cable/ Grey Rose 3.5mm Single Ended Cable
• RS9039 DAC( Deluxe Edition ) / RZ-300m DAC (Value Edition)
• Leather carrying case
• Ear tips
• Extra Filters

UNBOXING EXPERIENCE

The QT-X is packaged in a sleek black box with the "X" logo from the IEM's faceplate on top. The unboxing experience is very simple, yet pleasant; everything is organized in its own place. One notable feature of the QT-X is that it includes a dac dongle inside the box, which is a significant advantage for customers who want a good dac dongle with iem but do not want to spend too much money on dacs. On the other side, individuals who already have good dac's and do not want to spend the extra money can get the value version, making this iem's price to performance quite high!



BUILD & DESIGN

The build of QT-X is fantastic; it is quite rigid and well built. I’m assuming the material used for the shell is resin, as they haven’t mentioned anything about the material it's made out of on their website, but there's no need to worry; as this IEM is well built and can definitely take some beating!

The design, on the other hand, is something that has impressed me the most. Rose Technics stated that this design is inspired by "The captivating beauty of the night sky & mysterious meteorite." Though the design wouldn't be to everyone's liking, I think the shiny and glittery effect goes well with this. And, talking about the shell aspect, one thing I don't like about it is that the nozzle is way too long; it protrudes too much. Also, one nitpick is that the faceplate is not completely seamless with the rest of the body; it's a bit uplifted. I think a seamless look of the faceplate like the IEMs made by Aful would make it even more gorgeous! Lastly, the "X" from the name on the faceplate kind of looks like an angry emoji, which is quite funny and different in my opinion.



FIT & COMFORT

The fit on these are tricky as your normal sized ear tips doesn't work with this sort of long nozzle. You will need to go a size below of what you typically use. A little bit of comfort is sacrificed due to its nozzle size. Even though it is very lightweight, the shell itself is on the medium to larger side. People with medium sized ears must try this out first before purchasing as they might find some fitting issues with it. During my testing, I've worn them for quite some time and they were not super comfortable. You'll always feel like there is something in your ears all the time. After an extensive use of the IEM my ears started to hurt. However, people with larger ears canals will not face this issue at all.



CABLE

As I have the Value Edition, I got the Grey Rose Cable which is made out of 5N Single-crystal Copper. The termination is 3.5 single ended, to be honest this cable doesn't do justice to the QT-X IEM. A better cable is a must or at least a balanced termination is needed.

The Deluxe Edition comes with Blue Rose Pro Cable which is made out of 6N Single-crystal Copper & Single-crystal Silver. Unfortunately, I didn't get this, but looking at the pictures it looks much better than the Grey Rose one and more important it is a balanced cable.

Unless you have a good balanced cable laying around, you shouldn't go with the Value Edition in my opinion. Going with the Deluxe Edition will be a much better pick for you.

SOUND

The Rose Technics QT-X features a V shaped sound signature which slightly leans towards the brighter side but not by much. The FR graph provided by Rose Technics shows that the upper mids are quite pronounced or emphasized but in reality they aren't that much and to those whom it might seem that the bass section isn't that much emphasized or isn't enough for true bass heads, they are wrong. The Bass on the QT-X is on another level and this will please a lot of the bass heads out there.



SUB-BASS

The sub-bass section is not as impressive as the mid-bass section, which might be a deal breaker for many, but then again the rumble of it goes really deep and it can really keep up its presence no matter what. The texture is really good on these and more importantly, even if it might not please some people with the amount of quantity it has, it will surely please them with the amount of quality it offers.

MID-BASS

The mid-bass goes deep and it makes its presence very known. What amazed me the most is the texture of the mid bass. The thump is really hard on the QT-X and it's one of the hardest hitting thump's I've heard in a while. The attack of it is really good as well. Although, it might sound a bit slow or sluggish if you're using it with a 3.5mm single ended cable, but with the 4.4 balanced cable it gets fixed. I think that the amount of mid-bass it offers will please a majority of the bass heads out there.



MALE VOCALS

This is where the QT-X truly shines and shows its glory. The male vocals are so rich and lively, not only that they are really smooth too! They also have some warmth to them as well, making them sound a bit lush as well. Also, the weight of notes in their voices are done just right and another thing to keep in mind is that they are a bit forward in the presentation which might not be everyone's cup of tea but I like it.

FEMALE VOCALS

They are clean and really smooth on the QT-X. It's a bit on the relaxed side of things. Not like they aren't lively or something, they definitely are but they're just too on the relaxing and smoother side of things. I personally prefer a more lively presentation but then again a lot of people want such a smooth presentation and most importantly there was no presence of "s" or "ss" in their voices. You can still hear the details and textures in their voices but it just feels like some sort of smoothness is overshadowing them slightly. And their voices do overshadow some mid range instruments sometimes.

INSTRUMENTS

Instruments sound really clean and well separated here, instruments presentations are done in a forward manner, which is always a welcome in my book. They don't sound thin or have any metallic tone to them at all. Instruments separation is one of the highlighting points of this IEM, each instrument is really well separated, never overlapping or sounding vague no matter what I throw at it.

TREBLE

Treble section is a bliss for the people who crave treble a lot, but more importantly the 'quality' of treble. The amount of treble is a lot here, but it's very smooth. It has a great amount of sparkle and air in it and the extension of it will surely please a lot of you out there. However, one nit pick that I have is that the treble section might sound a bit too forward sometimes and a bit distracting.



TECHNICALITIES

SOUNDSTAGE & IMAGING

Soundstage is quite wide, but falls slightly short compared to what's out there in this range. It falls short just in the width department. However, in terms of height and depth it excels with ease.
Imaging is really precise here, you can easily pinpoint the placement of each instrument or even the faint vocals in the background with no issues at all. This IEM totally shines in the imaging segment and in my opinion performs better than some of its competitors.

DETAIL RETRIEVAL & LAYERING

Detail retrieval is excellent, no less. It picks up a huge amount of details, you'll be able to hear a lot of micro nuances very easily here! And the layering is another strong aspect of this IEM, every layer is clear and distinct, I couldn't find any sort of overlapping at all!

DYNAMICS & TRANSIENT RESPONSE

Dynamics are really good, much better than some of its competitors out there. No complaints regarding the dynamics of these. What surprised me the most was its transient response, it's really really fast and to be honest I didn't expect it to be this fast at all.

CONCLUSION

The Rose Technics QT-X is going to be for listeners who primarily enjoy complex tracks rich in mid-bass, as it provides an extremely fast bass response with heavy impact and detailed texture. With this IEM, rock, metal, and classical music sound amazingly good, as does dominant female vocals, due to the energy and sparkle in the treble section. The QT-X deals easily with complicated tracks, displaying excellent instrument separation. Despite a lot of energy it still presents a smooth and pleasing vocals to listen to. Moreover adding a DAC to both the Deluxe and Value Editions is an intelligent touch since it adds further value for those who may not already own a quality DAC. Overall, the QT-X offers a well-rounded listening experience that’s both engaging and precise!

Rose Technics QT-X
The angriest looking IEM, in the world.

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If you don't like reading, here's the video version of this review:

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Disclaimer & Foreword

Rose Technics asked if I would be interested in reviewing their new CERAMICS X, I replied that I would normally only be interested in trying out their higher end products like the QT-X... so they sent me both ¯\_(ツ)_/¯

I received the upgrade-Deluxe version with the Blue Rose Pro Cord 4.4mm balanced cable and RS9039 dongle DAC.
The Value version without the DAC is around $340, and the Deluxe version is $440 USD.

The only thing they want in return is my opinion, so here it is.

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Build



Only once the packaging arrived did I finally understand that the logo on the face of these is not an angry emoji, but in fact a stylized letter X.
Of course, I won't ever stop getting Minecraft Creeper vibes from these and that's something that brings me a little bit of joy every time I use them.

The resin shells are also something to behold, as they are packed with glitter that constantly catches the light. Their shape is vaguely reminiscent of the Kiwi Ears Orchestra Lite, but with some of the longest nozzles you’ve ever seen.


I think if the nozzle was significantly shorter, I might achieve a very good fit with these, but on the other hand I also very weirdly experienced no problems wearing these and also find them to be among the most comfortable I've ever worn, which might also because of the air gap between the shells and my ears – the only part that touches are the tips and cable.


The QT-X comes with a set of unique small size foam tips that appear to be designed for a deeper insertion depth. I found that these tips provided the best bass seal and superior isolation over the silicone tips, without any change in comfort or overall sound quality. I appreciate the strong consistency despite the change in tips, however the silicone tips provided a more secure fit, so that’s what I ended up using the most.

The shells are vented, which means that there should be no problem in getting a deep insertion and struggling with air pressure problems.



The shells house 7 drivers per side, a single 10mm dynamic Liquid Crystal Polymer driver and 6 BA drivers.
Having only just recently reviewed the Rose Technics Star City 5 Pro, I can't ignore the fact that it appears that the QT-X houses the exact same dynamic driver (only appears to be the same, I actually have no idea).

Of course, hardware is only half the story. There are also only so many balanced armature drivers out there too, and many products at different price brackets share identical transducers, so I'll try not to let this skew my impressions.



The 2-pin royal blue cable is beautifully finished with copper coloured connectors and reaches near the peak of the less common cable-building philosophy of using fabric sheathed cables.

It's significantly more unwieldy than the best woven silver cables I've used, as it has quite a strong coil memory, but once properly unravelled, it does a fair job. I think the thinner Star City 5 Pro cable is actually more functional in terms of being flexible and getting out of the way, but I think the goal here is to also make a stronger and more reliable cable. I don't hate it at all, and despite the extra shape memory, I seldom got annoyed with it.

The sheaths for the ear-hooks have a milky appearance, which is a bit of a shame. I would have preferred to see something more transparent, but with how thin these cables are, this may have been a necessary compromise to increase rigidity.



The leatherette case is as excessive as you might expect at this price point. It has similar vibes to the Simgot EA1000 jewellery box case, but is even bigger and heavier with a magnetic seal to keep it closed. It is also finished extremely well.

It's not as functional as I prefer, but it does give the feeling of a high-end experience every time you use it.
Unfortunately, the case became stuck to the glue inside the foam packaging where two pieces of foam were adhered together.

This left two permanent marks on my case, so I have to take some points off there.


Speaking of the packaging, I think it's well into the excess.
They definitely could have put this all into something a lot smaller, saving on materials, especially the amount of foam used.
In future products, I would prefer to see more easily recycled materials like cardboard.

In the packaging you get:
• a set of 4 sizes of silicone tips
• 4 sets of small foam tips
• a few sets of spare nozzle dust filters
• and of course the dongle DAC (Deluxe-version only)

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The ESS9039 Dongle DAC



The ESS9039 dongle DAC is perfectly fine, especially when used with a laptop or PC. Is it weird that I think the detachable cable is the stand-out feature of this dongle? It’s super high quality and prevents twisting due to it's asymmetrical shape lengthways.

Aside from the awesome cable and very acceptable build quality, it is extremely lightweight at 14.5g without the cable, and able to play up to a sample rate of 384000hz @32 bits.


However, using it with my smartphone the QT-X is not recommended.
The QT-X is so sensitive, that on the lowest volumes, a single change in volume is far too big of an increment, and very often I found that it was almost always either too loud or too quiet.

When using the QT-X with my smartphone, I have deferred to using other dongles with their own volume controls with more volume increments.

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ESS9039 Dongle DAC Sound

Measuring a Sennheiser HD650 seated in the same location on the miniDSP EARS with three different amps, the Rose Technics ESS9039, Fosi Audio SK02 and audio-GD NFB11.28 TCXO reveals that it is neutral and does not impart any tonal characteristics of it’s own.

(graphs overlay almost perfectly)


However, since output impedance is a thing, let’s see how the QT-X differs on the same 3 amps.



Interestingly, the ESS9039 causes the QT-X to deviate slightly from the other 2 amps, with a 2dB rise in the base and a 1dB reduction in the treble peak.

It’s a very small change, but may be a welcome one nonetheless, and something to consider if you want to use this combination with a laptop, which would be one of the more ideal scenarios.

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Sound

Sound impressions were made using the
• Rose Technics ESS9039
• Fosi Audio DS2
• Fosi Audio SK02
Connected to my phone and PC.

As they are, I can't fully get behind the frequency response.
Of course, on one hand I don't want all my headphones and IEMs to sound the same, that would be boring, but it's also too far outside of my acceptable tonal range.



Pinna gain, or canal gain is far too present, as is the treble.

These present almost a perfect V-shaped signature going by the miniDSP EARS graph, so on the other hand, their stock sound is also extremely well tuned for low-volume listening, as it has something of a strong loudness curve applied.

Going back to the Rose Technics Star City 5 Pro, I feel like I can't continue without making this comparison.
The overall timbre and texture between these two is quite similar, although the Star City 5 Pro is actually the more neutral of the two, it is also the more calm and pure sounding.



The QT-X sounds like it is following a similar philosophy in it's tuning but with more 'fun' added in with the extra bass.
Bass is of course thumpier than neutral, and while I wouldn't consider it a basshead IEM, there is enough to satisfy those who listen to all genres.

The midrange timbre and tone is actually overall very good. I think some people might think these are a little on the cold side, but I think there is just enough bleed from the upper bass into the mids to give enough warmth to vocals which are more boosted on the upper end. A fine balance has been achieved.

Treble and upper mids I think could have been reigned in a bit.
Of course not all recordings are equal, and there are some that sound perfectly balanced, detailed and articulate with this level of treble, but then there are others which do sound piercing, bright and uncomfortable.

On the whole I've been listening to these with only a very small small sub-bass boost, which has worked very well for the most part in satisfying my bass needs, especially for noisy outdoor use and for balancing out the slightly boosted upper mids and treble.
Occasionally I have only reduced the pinna gain around 4KHz, especially for some older recordings and rock music.



I'm very happy to report that the staging is on the larger side with a very precise stereo image that puts things mostly in front of you, with a good amount of width. It's mostly locked into the typical head-space, with the occasional sound appearing from outside.

Detail is excellent, but not the main focus of the QT-X. I feel like there is a slight veil holding them back from being truly transparent.

On the positive side, the venting and softer bass texture makes these quite non-fatiguing, which is of course good for long listening sessions.

As for separation, they are good, but not good enough at this price point.


Also tip rolling yielded very poor results for me.
The stock tips are quite short with very wide bores and switching them out to use full foams or anything with narrower bores ruined the staging and bass presentation.

Finally, to summarize:
• the bass is deep and can be thunderous as it’s tuned just north of neutral. It’s not a basshead bass, but enough to satisfy most ears in most situations.
• the mids have mostly great tone and timbre, but this is where it’s missing some detail and finesse in this price bracket compared to the most brutal competition.
• treble is the weakest part of the sound with a darker splashy, almost plastic timbre that takes away from the otherwise detailed and somewhat airy presentation.

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Conclusions

Of course, that’s my harshest, most unfiltered opinion. In the grand scheme of audio, these still sit comfortably above the sea of IEMs under 200 EUR, but above that, things get more complicated.


On it’s own, I can’t confidently say that it’s worth it’s entire asking price. The combination of an unusually long nozzle with a specific tuning that I know won’t suit all tastes makes these stand out as having quite a unique personality.

Perhaps there was a specific target, or there is an experimental aspect that Rose Technics wanted to try out; of course I can only guess, but it’s those quirks and ultimately the sound quality vs price that prevents me from being able to comfortably offer a strong recommendation.



I believe that there are many out there who would enjoy these, making a direct comparison with my current benchmark, the Orchestra Lite, they are basically on par with soundstage, imaging and detail.
Even the subjective musical performance of both is very similar, with the Orchestra Lite edging into the lead with slightly more convincing dynamics.

The biggest obstacles holding the QT-X back are the nozzle length and the price, because they’re not objectively bad IEMs.

On the flipside, if you’re looking for a very particular tuning that does tastefully smooth everything over while adding some forwardness and a kind of sweetness to vocals and upper mids, these are still a strong contender, especially if you’re willing to EQ to taste.



By far, the QT-X sounded it’s best to me during low-volume listening sessions at home or the office.

The V-shaped sound behaves somewhat like a loudness curve, so at lower volumes, you still get the emphasis of lower bass and upper treble, making them sound more energetic and enjoyable than many others at similarly low volumes.

In the end, I do personally rank them among the better IEMs I’ve ever heard, and compared to the sea of options out there, I think they often do present a decent value proposition, but ultimately I think this is going to be one of those Marmite IEMs that will divide opinions.

TONALITY: 7.8/10
TECHNICALITIES: 8.8/10
TIMBRE: 7.8/10
SOUNDSTAGE: 7.5/10
IMAGING: 8.5/10
MUSICALITY (subjective): 8.2/10
CONSTRUCTION: 9/10
ACCESSORIES: 10/10
SOUND VALUE: 8.5/10

INTRO

Rose Technics is an IEM company based in China that create IEMs for near 10 years. They specialize in hybrid earphones and make their come back lately with the release of QT9 MK3, a 5 drivers hybrid IEM which I review and enjoy.
Today I will review their flagship hybrid IEM call QTX, which consist of 7 drivers hybrid IEM.

Priced 340$ (or 440$ for deluxe bundle), the QTX use a 10mm LCP diaphragm with tesla magnet dynamic driver plus 6 knowles balance armature.

They describe their sound ideal as ‘’ smooth and dense vocal reproduction, lively string instruments, and a rich atmospheric ambiance.’’

The QT-X being the flagship IEM from this company, we should expect even greater technical performance than the excellent QT9 MK3 which cost 185$ right now.

Now the Roses enter higher end market, let see if both the performance and musical appeal are up or above their asking price.



CONSTRUCTION&ACCESSORIES



The QT-X have a prime construction quality made of high grade resin plastic that feel thick and sturdy, it's smooth too with a ergonomic design that is thinked for deep fit due to ear canal like shape which is long , yet the metal nozzle is rather small, thinked for short bore eartips, as included in package.

Shallow fit to is possible, but IEM will be more proeminent, yet still comfortable since I use it both way.

Isolation can go excellent, up to -26db with deep fit, which i comfirm since even bikers on the street can't distract me from my sacred music with those.

Then we have a 2pin connector, not recessed but protuberant, at it's side their a venting hole, this is wise placement since it can't be block by deep fitting.

The glossy sparkly colorful purple color is really beautiful, not too exuberant yet very eye catchy too. The overall craftmanship of QT-X scream quality and is on par of what we can't truely expect for this price range.



The cable included in Delux version is excellent, it might not look thast fancy like this but what's inside is what count and this Blue Rose Pro cable is a 4 cores single crystal copper and single crystal silver. i've try plenty of cables with QT-X and this one is excellent and deliver clean dynamic bodied sound that don't mess up tonal balance nor negatively affect resolution or attack control, it's a Pro cable that don't color anything yet unlock lively musicality of your IEMs.




The packaging experience is luxurious and sober, this deluxe version include a rather surprising dongle, the RS9039 which is a quite capable and powerful (300mW) dac-amp using the latest saber ES9039 dac. Then we have a good amount of eartips thinked for deep fit, which are short wide bore and memory foams models. Then we have a nice quality carrying case, with enough space for the IEM and cable and even an extra cable and ear tips. All in all, this is excellent accessories, construction and packaging design.

SOUND IMPRESSIONS




The tonality of QT-X can be summarized as bright, energetic and well balanced W shape, it’s both a technical and headbanger set without going basshead route. This is something I notice with Rose IEMs: they offer energetic punchy low end with super speedy and controlled attack, the tesla DD used is no joke and here it complements well other high end balanced armature both in textured timbre and macro dynamic intensity.
This is all but a boring set, yet not a ‘’treble head only’’ niche one, while bright, we aren’t in shouty or trebly fest.

But for warmer and more laid back tuning, we already have the QT9 MK2 in Rose catalog, so here it’s the logical upgrade to a bassier and more V shape QT9 MK3, another IEM that impresses me with both its technical performance and speedy textured bass response.

So as said, while not basshead level big thunderous low end delivery, these QT-X will certainly impress bass quality lover, we are into bass-fi territory with expeditious transient free of sustain bleed and super hard and tight punching with clean sub bass that has plenty of texture and fast release that avoid muddyness of all type.
The mid bass is thicker than sub bass which rumble in a lean way, don’t feel compressed nor boosted in resonance, bass lines are quick in delivery with nice bite to it, both kick and bass line can cohabitate without mixing each other sustain-release.
I’m rarely satisfy with mid bass, and i can say this for a lot of legit basshead IEM too where point of impact is missed and slip into sub bass, feel thin in proper impact weight or too sloppy and slow, here we have the speed, the round and textured acoustic kick drum having both presence definition and thumpy physicality, this make QT-X as good for jazz than rock because of good layering of bassline and kick as well as speedy control for drummer virtuoso and proper punch for metal head.
Unlike other IEM with bright bass, the QT-X don’t go thin or dry nor compress all the natural resonance release which has good headroom without embracing the whole stage or bleeding on mid range.
The magic of multi drivers is well used here and bass stay clear and clean in the back of multi staged mids and treble that are more upfront.
Bass loving without guilty pleasure, how not to be impressed by this? This is really among best bass quality i've heard in sub-100$ price range, to get both the dynamic weight and presence texture for proper definition of kick and bass line is truely captivating, yet the tesla magnet is no joke in term of transient push, which is super speedy and well controled, permiting excellent layering within an energic macro dynamic.

The mid range is bright, forwards, edgy, clear and focused in the middle stage in a slightly compressed way. This isn’t lush laid back mids yet it doesn’t go plain thin due to a notch of balanced armature euphony mixing with otherwise very textured timbre. This tends to polish definition edges without stealing definition of presence envelope.
The vocals are clear and highly intelligible, their lower mids for even fullness that don’t put forward texture grain too much, timbre is brightened a bit but realist, transparency is medium, like seeing through a textured fog as sound layers.
I’m not the biggest fan of the female vocal here which I find a bit too loud and upfront, it tends to overshadow other mid range instruments a bit which isn’t that great for 7 drivers IEM.
The good news is that male vocals are better, presence is wider and fuller, but sibilance might be more noticeable too if the recording doesn't manage it well enough.
When it comes to win instruments like saxophone, it’s similar to vocal, higher range will sound more shouty and upfront with compressed presence but textured and realist tone, baritone will sound fuller and more natural.
Then for piano, it’s a bit more recessed and light in note weight in lower range then louder and sharper in higher range, this shows the dominance of higher harmonic when it comes to certain instruments. It seems the QT-X tuner listens a lot to rock due to male vocal and thumpy textured bass that favor this music style.

After the bass, the treble is another highlight of the QT-X since for hybrid with BAs we have good amount of sparkle and brilliance as well as air on top.
We have great lower treble energy too that add attack bite to instrument like violin, electric guitar yet can make saxophone or high pitched female vocal a bit aggressive in loudness.
For violin, it benefit fast playin due to textured presence and fast agile attack of knowles balanced armature, sens of transparency is preserve too so orchestra will have good macro layering too. Timbre wise, it’s on the bright slightly dry side but very realist and not metallic sounding like with cheaper ba, violin has non colored tone, texture is clean and crisp without unpleasant noise artefact, it’s noth thicken with euphony or lower mids warmth, so for more romantic playin it might lack a bit of lushness, but i find it more problematic for vocals an winds instruments than strings instruments.
All those BA’s are for good use with the QT-X and don’t goes overtone or euphonic, it’s very generous in micro details and enter the analytical territory when it come to complex percussions with multiple tone and timbre like in Nok Cultural Ensemble which mix electronic beat with live instrument and tribal tabla and percussions, suddenly i can’t pick up each of them in a very well layered macro resolution. To get this treble performance under 400$ is quite a tour de force in it’s on hybrid IEM right.
I need to underline the fact QT-X use high end knowles BA, this mean timbre texture is rich and realist, attack is speedy and controled with a clean release unlike more noisy or euphonic budget BAs.
If you like fast snappy highs that doesn't sound thin nor extend too long in release to avoid boosted splashyness, the QT-X treble will impress you with it's vivid yet cohesive balance that don't stole the show of mids and bass even if it's most energic part of spectrum with lower treble region being more fiercefull and lively.

The soundstage isn't the biggest, it's rather closed on listener, it's taller than wider but have good sens of depth still. It surround you in an holographic way, it doesn't feel like frontal speakers sound, more like intimate surround system with 2 woofer in front and one tweeter each side.

The imaging is excellent, from bass line to vocal, saxo or piano to percussions, the separation is effortless in layering yet not widest in lateral spacing. Positioning is accurate yet compressed in term of spatiality openess.


SIDE NOTE



The included dongle is quite impressive because I was expecting a very entry level one and we get a capable dac-amp using latest sabre ES9039q2m DAC, promising high resolution and good performance.
This is stated as 300mW@32ohm, but this isn't most powerful dongle i heard in term of dynamic and I don't feel it drive properly planar IEMs which sound a bit too lean and can have bass distortion pass certain loudness level, which will not happen with a 1W dac-amp for ex, so this isn't driver fault but lack of current swing fault.
For sensitive IEMs like QT-X, the rendering is clean but i don't think it's balanced output has low enough impedance for purest sound reproduction.

Sound wise, this is a bright neutral tonality, with textured timbre, good micro details retreival and high sens of transparency. Dynamic is lean, this isn't thick sounding musicality, bass punch is in fact tamed and get extra texture, which go dryer. Vocals and mids presence is upfront and clear, but not very wide nor lush, it's not a colored sounding dongle. Macro dynamic isn't the most open and multi staged, sound layers are close to each other which mean you don't get holographic magnification of sound experience. This is focused and highly resolved musicality, it's colder than warmer and treble is sharp but not spiky or unbalanced, we can dig in highs and find tremedous amount of sound info, this dongle isn't limite in resolution.

All in all, it's a very good dongle, a logical upgrade to something like Fiio KA3 that use a bighter and noisier ES9038q2m, this one is more organic in balance and more realist and smoothen in timbre. This is a 100$ priced dongle performing good for it's price so unless you already have a good dongle this inclusion will be very valuable.

VS Letshuoer DT03

The DT03 use dual sabre ES9219C which is more entry level DAC-AMP chip without independant amping section, yet since it use 2 chip, final output should be 4vrms and while it's stated to deliver 200mW@32ohm and RS9039 300mW@32ohm, it's evident that DT03 is more powerfull whatever the specs are legitimate or not.
I can't pass 50% volume aat high gain with hard to drive planar IEM while i need to go 80% with RS9039, with all IEM I try it do the same, and this translate is more dynamic swing and livelier holographic layering and more open spatiality.

The DT03 have a volume control that work perfectly and a low and high gain switch. The dongle size is a bit bigger, about 15% bigger. Both 3.5mm and 4.4mm jack are gold plated with RS9039 while it's just the 4.4mm jack that is gold plated with DT03.

Sound wise, these are very different.
DT03 is warmer, bassier and lusher sounding, instrument and vocal have more substance but are less transparent and textured in presence. Resolution is inferior and background is less clean.
RS9039 is leaner, and more neutral, it's brighter, more transparent and crisp. Bass is more textured but less dynamic, less round and impactfull. Overall musicality is colder, more analytical. Vocal are more prompt of sibilance accent, spatiality is more intimate and closed.
Attack has cleaner and less euphonic sustain-release, it make percussions more define and snappier.

DT03 is less technical sounding, more musical and laid back, RS9039 is superior in clarity, imaging, attack definition, yet less holographic and 3D, and dryier-thinner in timbre as well as leaner in dynamic rendering.




EXTRA NOTES

You can wear QT-X deep or shallow fit. Deep fit permit cleaner crisper sound, but soundstage is more ''in-your-head''. With shallow fit, spatiality is wider though not as clean, we have notch of warmth in bass sustain release which make it thicker, rounder in punch but not as textured.

The QT-X are easy to drive and don't like source with too much gain since it can create euphony and negatively impact resolution as if both DD and BAs get over excited and create more harmonic distortion. This is very typical of hybrid IEMs with BAs.


The QT-X are sensitive to cable, unlike single DD unless high in sensitivity, these IEM benefit from the stock cable which is excellent, cable that add loudness gain isn't suggested since it will do like source with high impedance and color with euphony the transient sustaint-release.


COMPARISONS

VS SOUND RHYME SR9 (1DD+8bas=300$)

The QTX is brighter, more W shaped, more technical and crisp sounding.

The bass is more textured, speedier, cleaner and more controlled in mid bass punch, less thick and rumbly, less warm and dominant than the more bassy SR9.
Mids are more compressed in presence and centered with QTX, yet clearer and edgier in definition, it’s more speedy and controlled in attack, less prompt to macro muddyness and can deal way better with busy track in terms of macro layering readability. SR9 has lusher darker mids, vocals are more pleasant and colorful, timbre has more substance but less texture details and transparency, it’s smoother too.
Treble is notably more vivid, snappy and crisp with QTX, level of micro details is higher, separation of percussions is clearer and sharper, their less hazy euphony on top and cleaner air around the instrument. Balance is more spiky, less fully rounded and smoothed with QTX.
Soundstage is wider and taller with SR9, while deeper but more compressed with QTX.
Imaging is a notch superior with QTX due to crisper layering and higher clarity, as well, their less bass bleed that darken background which permit more precise positioning even if in smaller spatiality.
All in all, technical performance sur go to QTX and this is most likely due to superior drivers from tesla DD that is super speedy and controlled to sonion and knowles BA that offer less euphonic transient and more resolved clarity which benefit imaging readability. Tonality wise, SR9 is more relaxed and mid centric, vocals are lusher and more enjoyable, everything sounds thicker too and overall bass is more fun (and guilty pleasure).


VS ORIVETI OH700VB (1DD+6BAs=700$)

The OH700VB is more U shape, bassier and warmer with notably more boosted and thicker, rumblier sub bass. It makes QTX sound even more W shaped and crisp, cleaner and more technical too.

VB bass is juicier and less textured and hard punching in mid bass, it offers bigger wider slam and adds more resonance warmth, kick drum is less well defined and not as speedy, we have creamier sloppier sustain-release too with VB. Instruments like cello sound less dry and thin while electric bass has more textured presence and grunt with QTX. Bass quality goes to QTX, while lushness, slam weight and fun appeal goes to VB.

Mids are notably brighter and more forwards in upper mids presence with QTX, it’s clearer with more compressed and centered vocal and instrument, VB timbre is less textured and more colored, vocals are less shouty and more laid back with wider more buttery presence. No doubt I prefer the vocals of VB.

The treble is more vividly detailed with QTX, it's more snappy for percussions, it deals better with busy track but it can go more splashy and trebly since it’s more aggressively bright than more laid back and darker and less crisp OH700VB.

Soundstage is notably wider and taller with VB, while we have a greater sense of depth with QTX.

Imaging is superior with QTX, separation is cleaner, layering more transparent and more textured definition permit better readability of sound info.

All in all, QTX is superior in technical performance with it’s speedier more textured bass, clearer mids and more detailed treble but the smoother bassier musical appeal of OH700VB is more even to me due to lushest vocal, more buttery timbre and less fatiguing upper mids.

CONCLUSION




The Rose QT-X take me by surprise in term of sound performance prowess, and I can't get enough of it's speedy textured punchy bass even if I wouldn't say no for a bit more boost.

It's one of those rare IEM I can see both treble head and bass quality lover enjoy.

The QT-X deliver a very competitive technical performance for it's asking price (340$), the clarity is excellent as well as macro layering is effortless and holographic.

In term of musicality, I don't think those are the best choice for mid centric lover nor those seeking warm or dark laid back signature, this is engaging and energic musicality which is bright and want to rock your socks off with it's punchy and urgent sound delivery.

This W shaped balance isn't too extreme or spiky, it's overall well rounded and avoid overly sharp treble boost that could make micro details or percussions feel detached from the rest of spectrum, and being able to achieve a 7 drivers cohesion with such dynamic authority is very impressive.

I've try alot of 500-1000$ IEMs, and the QT-X can handle most of them easily in term of technical performance, then for tonal balance it will be more subjective, again I wouldn't suggest those to people that are very sensitive to upper mids gain, which can make vocal and saxophone a bit too agressive in intensity.

For all the other, these are very highly recommended and among the best sound value in 300$ price range.


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PS: I want to thanks Rose for sending me this review sample. As always, those are my independant minded subjective impressions and I have no incencitive to write positive review. The Qt-X will not take part of my 300 IEMs collection.

You can order the QT-X for 340$ (normal) or 440$ (deluxe) here: https://rosetechnics.com/products/qtx-hifi-hybrid-wired-headphones-1dd-6ba-iem-ess-9039q2m

𝐑𝐨𝐬𝐞 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐬/𝐑𝐎𝐒𝐄𝐒𝐄𝐋𝐒𝐀 𝐐𝐓-𝐗 𝐃𝐞𝐥𝐮𝐱𝐞 𝐕𝐞𝐫𝐬𝐢𝐨𝐧
*Disclaimer this review is personal opinion and not sponsored by any company, on this item is my private collection, and please forgive my bad photography and languange*



𝐒𝐩𝐞𝐬𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧:
- Impedance: 18Ω
- Sensitivity: 108dB
- Frequency Response Range: 20-20000Hz
- Connector Type: 0.78mm (2-pin)
- Driver Configuration: 1 dynamic driver (10mm LCP tesla diaphragm dynamic)+ 6 balanced armature drivers
- two 30018 for mid-lows , two 29689 for mid-highs , and two 30019 for highs

𝐖𝐡𝐚𝐭’𝐬 𝐈𝐧 𝐓𝐡𝐞 𝐁𝐨𝐱 :
- QTX Unit
- Blue Rose Pro Cable with 4.4mm balanced plug
- Leather Box
- Eartips
- RS9039 Dongle

𝐃𝐞𝐬𝐢𝐠𝐧 & 𝐁𝐮𝐢𝐥𝐝:
Let’s start with how this product looks and feels. Rose Technics or ROSESELSA features 7 hybrid configuration (1DD+6BA) and I believe the BA drivers come from sonion (Because on the website mentioned use Danish Drivers). Using resin material with 3D printed technology with metal nozzle (probably alumunium with gold color). As far as build quality is really fair with its price tag.

𝐓𝐨𝐧𝐚𝐥 & 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐐𝐮𝐚𝐥𝐢𝐭𝐲:
Tonal is neutral to bright, Separation is quite amazing for 7 driver configuration you can hear each instrument are precise and quite clear on busy tracks. Stage quality give you sensation of little bit outside your head.

𝐋𝐨𝐰 𝐅𝐫𝐞𝐪𝐮𝐞𝐧𝐜𝐢𝐞𝐬 𝐐𝐮𝐚𝐥𝐢𝐭𝐲:
Using 10mm LCP tesla coil dynamic really helps this IEM to produce such powerfull but really well controlled bass. Clean, quick, and detail these three word can describe how the low quality its delivered.
The bass is not really big in quantity, and not so pronounce in mid-bass, but it can give you really punhy sensation without bleed to mid frequencies.

𝐌𝐢𝐝 𝐅𝐫𝐞𝐪𝐮𝐞𝐧𝐜𝐢𝐞𝐬 𝐐𝐮𝐚𝐥𝐢𝐭𝐲:
Clear, mid centric tuning that deliver you clear vocal and instrument details, with little bit forward sensation. You will heard clear and unveiled voice with minimum sibilance.

𝐇𝐢𝐠𝐡 𝐅𝐫𝐞𝐪𝐮𝐞𝐧𝐜𝐢𝐞𝐬 𝐐𝐮𝐚𝐥𝐢𝐭𝐲:
Very clear, but lacks in weight in upper frequencies. Very well extended but not fatiguing, You still can feel the airiness from treble decay.

𝐂𝐨𝐦𝐟𝐨𝐫𝐭 & 𝐅𝐢𝐭:
Comfort is key, especially for long listening sessions. But since this IEM has bigger shell and longer nozzle, so it may be discomfort to smaller ears. But in my test I don’t feel any discomfort from it. My suggestion is to pick your preference tips since the included tips are not really great in isolation.

𝐕𝐚𝐥𝐮𝐞 𝐟𝐨𝐫 𝐌𝐨𝐧𝐞𝐲:
Is it worth? QTX Deluxe is priced at $450 (Deluxe version) still worth the price, but can it beat other products on there price range? You will be the judge by your own preference. In my opinion it’s still competitive with the Deluxe version that include you a dongle.

𝐑𝐚𝐭𝐢𝐧𝐠:
𝐋𝐨𝐰 = 𝟖
𝐌𝐢𝐝 = 𝟖
𝐇𝐢𝐠𝐡 = 𝟕,𝟕𝟓
𝐓𝐨𝐧𝐚𝐥 =𝟖
𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 = 𝟖,𝟓
𝐕𝐚𝐥𝐮𝐞 = 𝟕
𝐎𝐯𝐞𝐫𝐚𝐥𝐥 = 𝟕,𝟖𝟕𝟓 (𝐕𝐞𝐫𝐲 𝐆𝐨𝐨𝐝)

𝐋𝐚𝐳𝐲 𝐄𝐚𝐫𝐬 𝐑𝐚𝐭𝐢𝐧𝐠 𝐆𝐮𝐢𝐝𝐞𝐥𝐢𝐧𝐞 :
𝟔.𝟎𝟎 – 𝟔.𝟕𝟓 = 𝐆𝐨𝐨𝐝
𝟕.𝟎𝟎 – 𝟕.𝟕𝟓 = 𝐕𝐞𝐫𝐲 𝐆𝐨𝐨𝐝
𝟖.𝟎𝟎 – 𝟖.𝟕𝟓 = 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐭
𝟗.𝟎𝟎 – 𝟗.𝟕𝟓 = 𝐄𝐱𝐭𝐫𝐚𝐨𝐫𝐝𝐢𝐧𝐚𝐫𝐲

Thanks for checking out our review of Rose Technics/ROSESELSA QTX Deluxe!

DISCLAIMER - A FEW WORDS

Guys ...I think it's about time after having spend too much time over the Discovery Thread (among others) to testify my personal and completed experience with QT-X.

after havind read a couple of positive reviews over the net i decided to contact my self ROSE TECHNICS asking for a discount over the QT-X in exchange of course of my personal honest opinion-testimony.kindly enough those guys provided a discount coupon and i purchased this set luckily enough i did not regret it...on the contrary this one proved to be one of my most favorite sets for 2024 thus far......
I purchased the Deluxe Edition (Nebula Purple color) which includes Roseselsa the latest dongle/dac from Rose Technics equipped with the lastest ESS9039Q2M chip ,a 32-bit DAC with 300mW thrust.this dongle comes with two options (both included) a 4.4 balanced and a 3.5 single ended....just thought it was a really good deal overall using the discount kindly provided...............in any case any of you gets interested after all here's a link directly to their shop :
Rose QT-X
otherwise you are always free to check their products on AlieExpress & Amazon as well :

AlieExpress - Rose QT-X
Amazon Roseselsa Audio

A Brief Introduction to Rose Technics History (Then & Now)

Rose Technics is no stranger to the audio industry and has been proving themselves as a brand name for more or less 10 years now in a row....Recently they have renamed the company to ROSESELSA but everyone at the audio business till now knows them as Rose Technics
If my memory doesn't trick me.. it must had been somewhere around 2015 when “Rose Technics” was originally founded by LongYu a Head Sound Engineer and a very talented person as it looks. He is the one responsible for designing , tuning and manufacturing all of their monitors. One or two years later i was about to experience the elegance and the beauty of BR5 one of Rose's all 5BA sets by that time great monitors as far as vocal reproduction goes. I was during my first steps at this hobby (been a member heres since 2016) and everything seemed (by that time) unique and magical to my ears. Straight after this purchase of mine and a year later BR5 was about to transform to the well knowned BR5 MKII which gathered multiple positive reactions among the audiophile community and easily was pursuaded to get that one as well...........Well it certainly has been long ago but still remember the spaciouness and especially the wide open feeling of the later ( BR5 MKII ) to my ears.....at those early stages of the brand there had been som QC issues occuring from time to time especially towards their connectors (of that time ,MMCX connectors) but all this stuff belong for years now to the long gone past if i may use this term. Since then Rose Technics has prooved their point in proffecional sound engineering in many different ways / with many different products....(the QT9 MK2S or the later QT9 Mk3 are solid hybrid sets which easily gained recognition in this game.
BTW.........I still have the original BR5 and i must admitt that still after 7 years sounds absolutelly T R A N S P A R E N T to my ears.....(was looking for a right word to describe this 7 years old set and the right word is this one just because back at those early days this one was one the very first trully transparent monitors i had the chance to get.....)





(ROSE BR5)

ROSE QT-X FLAGSHIP




Specifications:

- Impedance: 18Ω
- Sensitivity: 108dB
- Frequency Response Range: 20-20000Hz
- Connector Type: 0.78mm (2-pin)
- Driver Configuration: 1 dynamic driver (10mm LCP tesla diaphragm dynamic)+ 6 balanced armature drivers
- two 30018 for mid-lows , two 29689 for mid-highs , and two 30019 for highs

Gear used for the purpose of this review : iBASSO DX 160/170 / Shanling M3X / HIBY R5 GEN II
Just for the record.. ROSE QT-X as of now has allready completed a total burn in period of 90 hours or so before any kind of critical listening.
Have used the superb stock cable provided there and Tri Clarion ear tips for the purpose of this review,all thoughts following below are completely and absolutely subjective,,,,




PACKAGE - DESIGN / FIT & COMFORT / TECH INFO

thi is the latest hybrid earphone , a flagship product, featuring a golden ratio of 1 low-frequency dynamicdriver, 2 mid-low frequency drivers, 2 mid-high frequency drivers,and 2 ultra-high frequency drivers. According to Rose Technics always ...this configuration ensures a significantly reduction of phase difference distortion and delivers a highly detailed sound quality.
QT-X is ergonomically designed, resembling a custom-fit in-ear monitor with a deep second bend design. This greatly optimizes the information capacity and distortion rate of the QT-X. The shell is manufactured using medical-grade 3D printing technology and hand-sprayed with imported Russian nebula paint, making it both beautiful and profound. There are four colors available for selection or combination.i choosed the purple one it was closer to my liking...in pure terms of comfort i find this one nothing less than ideal for my ears at least.There is a secure and deep insertion of the nozzles ,and using the right tips the isolation from any external source of noise is perfect !! in this case i found Clarion Tri silicone tips actually doing the best job among others like Spiral Dots, Final E silicone tips,Dunu candy tips etc......
it was the closest i had ever tried in terms of custom fit ...but anyone's ear canals are quite different so please take this with a grain of salt..Take a notice here guys........... Its absolutely important for you to achieve a deep insertion with QT-X in order to appreciate it's sub bass power and thumb.. In most of the ocassions a small sized silicone tip will do the job, for me it was Clarion TRI silicone ear tips that provided the deepest and the more secure one..
Now about the cable ....along with the Deluxe Edition ROSE TECHNICS is providing the Blue Rose Pro a Mixed Dual-braided 4-Core headphones cable of 6N Single-crystal Copper & Single-crystal Silver wire. Aesthetically speaking ..a work of unique craftmanship....
The whole presentation of the package is generous quite luxurious dare i say so ,as you can see in the pictures below there are plenty sets of silicone ear tips along with memory foams so for everybody to get the closest he/she can get to a secure fit with perfect isolation.















SOUND PROFILE / FR ANALYSIS

A substantial amount of energy (pinna gain) is culmulating upon the upper midrange/lower treble region but not in the cost of naturalness of the sound.On the contrary this "expansion of energy" brings vocals upfront towards the rest of the FR and at the center of the stage .Upper treble seems subdued, leaving enough space for the midrange to shine.Another crucial characteristic of QT-X's unique tuning is the elevation over the sub bass region wich is certainly providing all the necessary foundation for any kind of bass line to come out with authority and create this way the atmospheric ambiance QT-X is absolutely capable of providing to the listeners.

As you can tell from the above FR Graph this is a much emphasized pinna gain tuning.

According to Rose the preferred music genres for these earphones are Mandopop, Western pop, rock, R&B, and blues, but i find it working miracles for EDM/Electronica,Trip Hop and Classical genres as well.......


ROSE QT-X is all about delivering smooth and dense vocals,, lively string instruments, and a rich atmospheric ambiance like an emotional earthguake inside your brain ....I consider this set as a mid-centric sound signature with a rich, spacious and lush open midrange wich by the way occupies the front seat right at the center of your imaginary head stage .Emotionality is the Key word at this case as every single instrument is place upon the midrange / lower treble is been portrayed in an absolutely fascinating and completely natural manner
Its totally suitable for most music genres,from acoustic /instruments/vocals which can portray as a true and unique specialist to modern produced IDM/eletrconica/heavy bass tracks (especially in this kind of music the sub bass impact /rumble is really substantial.....)


BASS

Really fast,fully articulated,speed and texture are both fantastic,providing this way a solid impact on each and every note there.....I am taking about the sub bass response here guys.... ..,because people having used to heavier bass signatures may be dissapointed and even to my taste i would prefer a little more midbass impact soooo.... bassheads won't be particularly happy here, but for everyone else it will be prety fine mainly because it is descent & distinct, assembled, with an articulated beat and sufficient speed characteristics. its a quality bass this one.... that will not overshadow the midrange frequencies in any case...this quality bass contributes in a fascinating presentation and do not dominates the scene in any negative aspect anyway
Subb-bass is more than noticeable here and comes across where and when called for, with authority and decent rumble......

MIDRANGE

The mids (lower/upper midrange) is at least to my personal opinion phenomenal...,it is for sure one of the highlights of ROSE QT-X
there is an open feeling all across the mid frequencies,vocals come across with depth and unbelievably analogue quality so transparent but yet solid that makes you feel its the closest you can get from a monitor to real life circumstances....
Much of the pinna gain is over the upper midrange/lower treble region so for the human voice in vocal tracks to be demostrated as vast and spacious, filing this way the most part of the FR leaving the other part of the spectrum a little behind / in the background, thus creating a unique ambiance to the listener
the degree of spaciouness/transparency over the lower/upper is more than substantial
male & female vocals are much enganging and with plenty of musicality and emotionality as well.....

TREBLE

High frequencies on QT-X are smooth as butter and velvetly reproduced with zero to none degree of harshness or metallic feeling....Everything flows naturally here,the timbre of the cymbals/hi hats,drums in general is most natural/thus mesmerising.....
even if not the most extended treble in degree ,the feeling remains extremely pleasant and quite natural as well providing this way a most relaxed listening and totally recommended for long listening sessions without any sign of fatique feeling to your ears....

The transition from the upper midrange is second to none, obtaining a most open and airy feeling demonstrating even the slightest cues coming from the original Master recordings. No sibilance or BA timbre detected there. Now as far as the upper treble region goes it becomes clear that this part takes a step back regarding the rest of the spectrum cleverly avoiding this way any unnecessary fatiqueness or unatural feeling..
Extended to a certain point (10khz)but subdued in a way ,taking a gentle approach , sparkly but fatigue free at the same time.all the upper region details are there ,not at your face ,at the background moving slowly inside your head filling you gently with all the information present at the recordings.

Nor hot,neither artificial,whith no strange peaks obtaining zero glare / grain , but on the contrary natural and forgiving even at the poorly recorded tracks



STAGE / INSTRUMENT SEPARATION / RESOLUTION / OVERALL PERFORMANCE

Instrument separation would be another highlight of the QT-X to my opinion as it is trully exceptional here...Each and every instrument is where it should be on it's right place on stage,with weight and authority,sound effortlessly travels from the left to the right side of your head demonstrating an amazing channel separation only to be found on higher price range iems,and you can easily pin-point each and every little element/cue of the original recording..Resolution is amazing as well,in heavier electronic tracks or heavily orchestrated pieces (string/brass sections) of music when plenty of instruments are involved and take place in the scene, QT-X stays top-clear and musical at the same time ,maintaining this way a very natural timbre.This way QT-X can easily handle any music genre you like, being always exceptional on vocal/ acoustic/orchestral tracks and physical instruments.At this case, the timbre is just mesmerising.Soundstage is wide and spacious, congestion is out of the question here, particullary in heavy orchestrated pieces of music including acoustical instruments is where imaging excels at most.



About the dongle/dac - Roseselsa ES9039 dac

the dongle/dac coming with the Deluxe Edition is quipped with the latest ESS9039Q2M chip,
The RS9039 is a 32-bit DAC with 300mW thrust, Signal-to-Noise Ratioup to 126dB, -110 dB very low THD+N, and support for 768 kHz PCMand DSD512.
It's ideal for high-end portable audio devices due to its low power consumption and high-quality audio performance for audiophiles. This exceptional dongle flawlessly converts digital audio streams into rich detailed analog sound and helps to deliver high fidelity listening experience.
I tried this one over several Daps and Smartphones (Hiby R5/R5 Gen II- ibasso DX/180/170/160 - Xiaomi POCO X3 - Samsung S23 - Xiaomi M11) it worked really well indeed in each and single one of them, providing you are using Hiby App as your preffered listening aplication.you can download this app from google playstore anytime you like and turn on the USB exclusive function in the Hiby APP, otherwise all Android based devices will show USB exclusive or OTG settings, go to those settings and activate / enable those.
as far as i tested this dongle along with QT-X the results were more than welcomed....the synergy turns out to be more than fine. the latest ESS9039Q2M chip provides a warm analogue alike sense ,providing along a bit more substantial weight to the lower region (lower mids/mid bass) giving a pleasant warmth and extra body to the overall sound.if your favorite presentation of music requires more body and weight this one will certainly improve the sound outcome...




RECOMMENDED TEST TRACKS :

Svaneborg Kardyb - Orbit





Svaneborg Kardyb are Nikolaj Svaneborg - Wurlitzer, Juno, piano and Jonas Kardyb - drums, percussion a multi-award-winning duo from Denmark, where they won two "grammys" at the Danish Music Awards Jazz 2019: New artist of the year and Composer of the year. 
Drawing on Danish folk music and Scandinavian jazz influences, their music is an exquisite and joyful melding of beautiful melodies, delicate minimalism, catchy grooves, and subtle electronica vibes,
at this particular track percussion takes rule of everything and matters the most creating the whole ambience of the scene .the "ooomph" and weight at the sub bass region created from QT-X is trully unbelievable ,the drums hit with authority and substance in a most unique and natural manner leaving you with the illusion that you re in a middle of a live recording session standing there with awe and admiration for this phenomenon.


Demen - Niorum




Demen is a group covered by obscurity and mystery in the vein of early 4AD record label......the operatic female vocals obtaining huge dimentions on QT-X and the authority in which the lower frequencies being portrayed is really something else .....the drum kits is beyond this world......while the singer seems to cover the entire head stage......what a brilliant reproduction that is !!!!!!!!!
(been listening to this track while writing down this review right now..) this QT-X 's sub bass kicks some serious ass...!!!! its amazing how the sound manages to expand to towards all axis of your imaginery head stage using QT-X

Angel Olsen - Endgame

another perfect example for someone to really appreciate and evaluate at the same QT-X's tremendous midrange abilities would be this track coming from female singer Angel Olsen
it is a chamber pop track heavily orchestrated using sets of brass,strings,cymbals,xylophones,flutes,,along with many more physical instruments.Her voice is heavenly represented on QT-X with grace and strong emotionality as the orchestra plays the complimentary role and always stays in the background with perfect harmony obtaining a most natural timbre in the majority of the acoustical instruments there...a perfect demonstration of natural sound.

Röyksopp - Sorry

Jamie Irrepressible's dark and profound voice is reproduced here with a feeling of sincere emotionality while the sub bass is taking care of the whole atmosphere being created pulsating and vibrating with distinct presence not overwhelming the rest of the spectrum resulting in a unique ambience and a most remarkable headstage for the listener,the depth of the scene here is trully admirable...QT-X is made for this kind of recordings , providing a rich and utterly atmospheric midrange ,and an enganging experience due to it's wide open stage and unique spatiality of sound across the entire FR.


Glass Moon - Leland Whitty

Leland , produced an absolutely beautiful solo record last year and in this particular track every physical instrument like double bass is a real treat with ROSE QT-X...The sound gets immediatelly addictive just right from the begging of the song takes you in, absorbs your mind.. right from the very first seconds.......,double bass,flutes,drums,Rhodes etc.... showcasing an utterly natural timbre,true to the original recording, i suppose you ll be 100% surprised of how close to real life this track sounds in terms of correct and natural sound reproduction .but particularly when it comes to strings it just feels like you re in the concert hall or the studio recording session,your choise..........


Hania Rani - Dancing with ghosts

Last but not least.....the "heavenly sent voice" of Hania's at "dancing with ghosts" is most heartbreakingly demonstrated at this marvelous piece of music flowing above every single instrument here...BUT the real treat here is the piano's lower keys...i really doubt that you will here such an unmistakable and natural piano timbre in your life other than QT-X's superb reproduction...its just so correct like being inside the studio with her during the original recording session.....instantly took my breath away.....and all the little cues from this recording portrayed with such grace around your imaginary head stage ....unbelievable reproduction of music this one.....





follows right after ...........
B A T T L E O F T H E Y E A R
...........so far

SELECTIVE COMPARISONS

vs Oriveti OH700VB

OH700VB is Oriveti's current flaghip and at the time costs nearly the double of QT-X's price.
OH700VB combines 6 balanced armature drivers ( 2 for high, 4 for mid) and a dynamic driver (for low).OH700VB delivers a rich and detailed sound with excellent clarity and accuracy across the entire frequency spectrum. Nevertheless it obtains a dark tonality.. and as strange as it sounds its somehow close to QT-X's sound, with a dark and subdued upper treble representation and a spacious deep midrange
at this case its simply a matter of personal prefference and taste if you take under consideration that there is also a significantly mid bass elevation (+3db) having the switch down on OH700VB and that's the main and more significant difference between those two sets.
Both earphones are equally good as far as sub bass/midrange reproduction goes imho,with QT-X being the more open one and obtaining a wider stage simply because of the energy and the air culminated in the upper midrange/ lower treble (due to QT-X's tuning) are quite more substantial there than OH700VB

vs PENON 10th AE

During 2023 i was lucky enough to get one of the most value for money monitors i ever purchased 7 years now in this hobby, and that is the PENON 10TH AE. As far as i am concerned this is a TOTL KILLER , a truly unique set of monitors with tremendous personality/value and capabilities,it happens to be one of my all time favorites and i consider it the absolute most balanced sounding monitor i have till now
......compared with ROSE QT-X is not fair enough partially due to 10TH's more sophisticated implementation using two isobaric subwoofers taking care of the low and SONION EST drivers for the higher registries but anyway..........lets find out ....ROSE QT-X is darker ,far more darker with a distinctive sub bass thump while PENON 10th's bass is way more impactfull with definition but more "inside the lines" with longer decays and faster attack and presence.midrange over the QT-X is moisterous and analogue/vinyl alike while on the 10ths is more airy and spacious more vivid and exciting Particularly in the midrange PENON 10TH AE sits among the the clearest you can get regardless any price range...
10THs midrange is just so crystal clear and transparent one like a lucid dream that makes it a real struggle for most of the monitors to follow there.... The treble on the 10ths is the most fascinating and fatique free EST treble i ve ever heard more extended than QT-X's treble with more energy and details there....But still both obtain a relaxed and fatique free treble region with the PENON 10th being the more sparkly and exciting one as far treble goes,....the note weight across the FR is thicker on PENON 10TH AE imho..But given the fact that anyone outthere looking for a more analogue like sound representation shlould pick QT-X over the 10TH AE because the first sounds more vinyl alike and a bit more natural, both these factors makes for me at least.. so difficult to choose between those two.....

vs ISN NEO 3

NEO 3 is clearly a dark set with subdued and safe treble characteristics and with a remarkable analogue alike note timbre and a tremendous bass department.. imagine like a wall of sound created giving the atmosphere across the entire FR. ROSE QT-X is a lot wider as far as stage goes providing a more open feeling but the depth of the stage on NEO 3 is really remarkable as well.........Tonallity wise NEO 3 is dense and thick thus reminding more of a vinyl like represantation of sound ,BUT it is more closed in, compared to ROSE QT-X, imaging its not NEO 3's strongest asset but spatiality of sound elements is really something else there ...... all these factors makes NEO 3 an utterly atmospheric ,beast dark and velvetly smooth as well......not designed for critical - accurate listening but for the joy of music ................
While NEO 3 takes the upper hand in mid bass reproduction,ROSE QT-X's sub bass kick and thump is quite noticeable and provides a more immersive effect from 20 to 60 HZ. In addtition to that effect ,midrange on QT-X is demonstrated in a very lively spacious manner making it way more suitable for vocal lovers and chamber orchestra pop tracks .......both share some similiraties as far as atmospheric representation of sound goes and at the end of the day its simply a matter of taste between those two.

vs ISN H60

H60 has been ISN's slight departure from the OG established bass orientated sound signature and well known as ISN HOUSE SOUND and a great success as well...
Vocals on H60 are upfront as well but more "between the lines" compared to QT-X ,the airy feeling especially in the upper mids is more noticeable on QT-X.In terms of spatiality of elements across the stage and spaciousness over the midrange both earphones are quite equal and strong. Treble is pretty energetic and dynamic in both of these sets but due to H60s more advance/updated Knowles BAs feels more polished extended and correct resulting this way in a more vast/open sound experience while on QT-X is a bit subdued (the upper treble that is) and rolled off there...
H60 is more prominent and impactfull in the sub bass region partially due to its tuning and due to the newest technology used there with the twin isobaric subwoofers one facing the other coming up with more note weight
Both sets are musical with H60 obtaining a far more fun orientated sound signature while QT-X sounds more reference like monitor compared to H60
Regardless of that, both are great monitors with H60 due to its tuning and newer more sophisticated implementation being wider , and QT-X the more airy and linear sounding between the two of them.





FINAL WORDS - CLOSURE

Being a FUN SOUND SIGNATURE kind of a guy (mostly) have to admit this set took me by surprise...i would easily clasify QT-X as a mid-range bracket excellence , in a market which is overly dominated most of the times by fun sounding signature monitors ROSE TECHNICS accepts the challenge and comes front, able to produce a reference set of monitors that combines many different elements and taking cues from quite different sound signatures but giving priority to the vocals and the unique representation of the human voice as it should be in the first place.The moment you hear this demonstration of the human voice that moment you ll know you can never go back to what you ve been listening till now....this one gets an easy and absolute reccomendation from me , particularly at this price point....its not common enough to find a super exciting earphone nowdays and QT-X is certainly one of those rare moments.... thanks for reading................

Rose Technics: QT-X Review: A Hybrid with Dreams of Reference​

I have a long history with Rose Technics. They were all the rage on Head-Fi in the Chi-Fi circles back in 2016, and I reviewed many of their legacy products: The Mini2, Mini3, Cappuccino Mk II, Aurora, and more. While not every single one of those were absolute winners, the Cappuccino Mk II stood out to me as an audiophile-grade bass-cannon and has stuck in my rotation for nearly 9 years now. The QT-X is Rose’s newest flagship hybrid IEM sporting 1 dynamic driver and 6 balanced-armature drivers. How does it measure up to the brands legacy? Lets find out!

The Rose QT-X can be purchased directly from Rose for $339 (value) or $449 (pro), here.

About My Preferences: Heads up, I’m a person! As such, these words are my opinion, and they are tinged by my personal preferences. While I try to mitigate this as much as possible during my review process, I’d be lying if I said my biases are completely erased. So for you, my readers, keep this in mind:

• My ideal sound signature would be one with competent sub-bass, a textured mid-bass, a slightly warm midrange, and an extended treble.
• I have mild treble sensitivity.

Source: The QT-X was tested in the following configurations:

• LG V40, Android 12 -> earphones
• Asus Zenhpone 10, Android 14 -> earphones
• Hidizs AP100 3.5mm out -> FiiO A5 3.5mm out -> earphones
• HiFiMAN SuperMini -> earphones
• LG V40, Asus Zenphone 10, Dell XPS 15, Custom PC -> Rose DAC -> earphones

All music was served as MP3 @320Kbps or as FLAC.

Tech Specs​

• Drivers: 6 BA drivers (2x Knowles 30018 lower-midrange, 2x Knowles 29689 upper-midrange, 2x Knowles 30019 for treble) and 1 DD (10mm LCP tesla-diaphragm @100–500Hz).
• High-quality cables. Standard Edition (8-core 5N copper) and Deluxe Edition (4-Core 6N copper + single-crystal silver) braided cables
• 2-pin 0.78mm cable interface

Sound Signature​

Sonic Overview:​

The Rose QT-X aims squarely at a natural, mid-centric sound signature with no frills or gimmicks. It does so by throwing 6 high-quality Knowles balanced-armature drivers with 3x crossovers at the midrange and treble, leaving the bass to a massive 10mm Japan-sourced tesla-diaphragm dynamic driver. This light-touch approach to tuning leaves the QT-X with a strikingly organic sound signature — a quick and limber treble, an articulate upper-midrange, a textured lower midrange, and a punchy bass that is capable of a respectable amount of rumble.

Sonic Breakdown:​

Treble: Songs used: In One Ear, Midnight City, Outlands, Satisfy, Little One, Show Me How To Live (Live at the Quart Festival)

The QT-X’s treble is a paired fairly linearly to its upper midrange. There’s some subtle lifts far into the upper treble giving the upper register a little extra sparkle. The QT-X’s detail retrieval is excellent, allowing the listener to pick out fine details within In One Ear: the buzzing of the guitar amp in the intro and the subtle inhale from the singer at 2:19 and 2:23, for example.
Rose did a great job of tuning the QT-X to be resistant to sibilance. At no point did I experience discomfort while listening to treble-heavy and sibilance-prone songs such as Satisfy, even with the volume turned up.

Midrange: Songs used: Flagpole Sitta, Jacked Up, I Am The Highway, Dreams, Little Black Submarines, Red:Birthmark, I Miss You

The flagship of an organically tuned IEM is its midrange, and Rose knows it. The QT-X separates and layers instrumentation and vocals gracefully and effortlessly, organizing them into a cohesive soundstage. The upper midrange is the most prominent feature of the QT-X’s sound signature, peaking at around 2–5Khz, right around where you get most of the meat from vocal and instrument detail.
Songs such as I Miss You allow the QT-X to show off its ability to texture multiple guitars independently, never smudging or blurring them together. The QT-X doesn’t simply resolve a detail, it places it neatly and naturally within the sound stage, often with a satisfying degree of air.
I found myself listening in on the somber vocals of I Am The Highway, ruminating on the fine tones and inflection in Chris Cornell’s delivery. Vocal intelligibility is top-notch for the QT-X’s bracket. The way the QT-X is able to model natural timbre in vocals is addicting — praise I reserve for top-quality IEMs.
As good as the QT-X is for male vocals, it is a little better with female vocals. The textured and expressive vocals from red:birthmark are staged with an intense clarity and deliberate placement. The QT-X almost seems to imbue them with a sweetness that I have not heard much outside of true TOTL IEM lineups.

Bass: Songs used: Moth, Gold Dust, In For The Kill (Skream Remix), War Pigs (Celldweller Remix)

The QT-X is no bass cannon, and it never tries to be. Rose allocated an entire dynamic driver just to the lower register, and it makes careful, measured, use of its abilities. This particular driver is a tesla-diaphragmed driver, meaning it is highly responsive, at least compared to your usual dynamic driver. You can clearly observe this when observing the attack and decay of the bass lines of War Pigs (Celldweller Remix). For a song so chaotic, the QT-X does a good job of metering the bass and lower midrange, keeping them distinct and preventing blurriness or smudging.
Even if the QT-X is not a bass cannon, it still has plenty of bass to go around — a hallmark trait of a hybrid. The QT-X’s bass is punchy and responsive, while the sub-bass is deep and capable of a respectable rumble.
Rose’s trademark extended sub-bass is here in full force, stretching healthily down to 50Hz and below. Skream’s remix of In For The Kill tests the QT-X’s willingness to dig deep, and in doing so, extracts a respectable bit of bass performance from it.

Packaging / Unboxing​

Rose’s packaging looks the part — its stylish and minimalist. You slide the sleeve off of the main box, then open the box’s magnetically-latched lid to reveal the IEM and its case tucked neatly away.

My unit was shipped all the way from overseas and changed couriers three times throughout. The ordeal did not disturb the QT-X though, and it arrived looking no worse for wear.

An interesting thing I did notice, however, is that the packaging smelled faintly of fragrance — a nice touch if deliberate.

Build​

Construction Quality​

The QT-X’s nozzles are a precisely-cut and polished brass-covered metal. They feature a chamfered lip that does a good job securing eartips in place and is even compatible with after market eartips like Comply.


Rose’s new flagship ditches the MMCX connectors for a standard 2-pin interface — a move that I commend. The connectors are raised from the shell ever so slightly and are reinforced by a small outline of material precisely extruded from the shell’s top face. This is an excellent feature as it allows the shell to diffuse lateral force from the connector more evenly, reducing the chances of a crack forming. The QT-X’s shell feels thicker and more robust than my older Rose IEMs, and since it doesn’t have MMCX, I’m not too worried about any carry-over issues for longevity.



The 4.4mm termination on the included Pro cable is weighty and solid. Its surface is highly-polished and evenly-finished. The cable’s inner termination is protected by a transparent rubber which should help protect that segment of the cable from being pulled at too sharp of an angle.



Rose used the same metal on the Y-splitter that they used on the jack. Not much to say here other than it seems sturdy and well-assembled.

Comfort​

As with every IEM, your comfort with the QT-X will be highly dependent on your individual ear shape. In my case, I have asymmetrical ears which results in a good seal on the left, and a slightly worse seal on the right. My right ear develops a small amount of irritation after about two hours. I can resolve this pretty easily with a minor angle adjustment.

The included eartips do a really good job of being comfortable, but none of them seal perfectly for me. After swapping to Comply foam eartips, I was able to double my comfortable wear time, so your mileage will vary.

Accessories​

Rose includes a DAC with both trims of the QT-X. I have the deluxe DAC, the RS9039. It is equipped with the latest ESS9039Q2M chip, meaning it’s capable of 32-bit operation. As for some technical specs:

• Output power: 300mW
• Signal-to-Noise Ratio ≤ 126dB: -110 dB
• PCM: 768 kHz PCM
• DSD: DSD512

As for IO, the DAC has USB-C input and 3.5mm + 4.4mm balanced output. Both outputs feel sturdy and holster cables nicely. The USB-C input feels similarly sturdy, though time will tell how robust it is.
Using the DAC has been pretty easy: I simply attached it to my many USB-C enabled devices and it worked on the first try, with one exception.

• Dell XPS 15 (2021), Windows 11: Flawless
• Custom PC w/ Asus Z370E onboard USB-C header -> case, Windows 10: Flawless
• LG V40, Android 12: Flawless
• Asus Zenphone 10, Android 14: Minor Issues.

My only real complaint in terms of usage is with my Zenphone. The DAC simply doesn’t seem to be happy on my Android Phone without me disabling pretty much every audio-related package via ADB — something that I haven’t needed to do for other USB-C DACs. An annoying issue, but a solvable one. In terms of performance, I quite like the included DAC. It pairs very well with the QT-X — a boon when considering how source-dependent the QT-X is.



The QT-X’s case can hold the QT-X and its Pro cable easily. There’s plenty of space to store extra eartips or a cleaning cloth too. However, trying to fit the DAC and its USB-C cable in the upper compartment is challenging. It’s technically possible with a smaller cable, or when the QT-X is disconnected, but it’s too snug for comfort either way. I recommend swapping to a more robust case such as one made by Pelican if you want to travel with your DAC.



The silicone eartips included with the QT-X are excellent. They are sized well (for the average listener) and stay secured to the IEM’s nozzle without issue. However, the foam eartips all appear to be the same size — which works only if you have smaller ear canals. I do not, so these don’t work for me. I’d like to see more variety in size.

Comparisons​

1: Rose Cappuccino Mk II ($350) @2017

The Rose Cappuccino is my favorite hybrid IEM, and the first IEM I ever listened to that made me believe an audiophile IEM can also be a bass-heavy IEM. These two IEMs are very, very different. The Cappuccinio Mk II is a 2x DD, 2x BA hybrid IEM, meaning it has nearly half as many drivers to work with as the QT-X. The QT-X the more balanced IEM of the two, with its natural, U-inspired sound signature. The Cappuccino’s L-shaped sound signature is far bassier and warmer, with a comparatively retracted treble. That said, the Cappuccino Mk II’s bass is so incredibly competent that bass-heads will still prefer it over the QT-X. The general audience, however, will likely prefer the QT-X’s wider range and excellent all-around presentation.

2: Periodic Audio Carbon V1 ($400) @2019

Switching between these two IEMs in an A/B test is quite disorienting, given how different they are. The Carbon is much more V-shaped — its treble is more pronounced, with a faster relative roll-off in the upper treble than the QT-X. Likewise, the QT-X has a more expressive midrange that tends to produce an airier feel. Finally, the Carbon has a weightier lower midrange and bass, giving it a warmer and more “substantial” tone. This makes the Carbon more capable at producing “wet bass” (a fine mixture between punchy bass notes paired with a complementary sub-bass note).

3: Symphonium Audio Aurora ($250) @2018

The Symphonium Aurora is a cheaper IEM built long before the QT-X, but its sound signature has a surprising amount of overlap. The QT-X and Aurora both have balanced, highly-extended treble that are free from distraction and sharpness. Each IEM possesses a transparent midrange, with the Aurora edging out the QT-X ever so slightly in terms of airiness. The QT-X, however, articulates tone and texture with a much wider range. It is able to capture weightier notes with more force and produces a more organic bass and sub-bass. The Aurora’s 2-BA setup makes it extremely linear in the midrange and bass, with little focus on the sub-bass. While I find the Aurora much more comfortable to wear for extended periods, I kept coming back to the QT-X to get the extra articulation in the lower register.

4: Dunu DK3001 ($480) @2018

The DK3001 is another old-school hybrid IEM featuring 3x BA drivers and 1x DD driver. At the time, it was Dunu’s flagship, commanding a respectable price. The DK3001 is a staunchly warm IEM that delivers a thick and weighty performance — strikingly different from the QT-X. The QT-X’s treble is more extended and better balanced than the DK3001’s. The DK3001’s bass is more exaggerated towards 150Hz, while the QT-X has better extension down below 50Hz. The V-shaped sound signature of the DK3001 suppresses its midrange, meaning the QT-X has an easier time capturing fine details in crowded instrumentals. Comparing these two IEMs shows me just how far we’ve come in just 6 years — the difference in refinement is palpably in the QT-X’s favor.

Summary​

The QT-X is yet another hybrid IEM with an exotic driver configuration from Rose. They’re experienced, and have learned a lot from building so many IEMs over the last 10ish years. It shows with the QT-X. It’s no exaggeration to say that this IEM is their most balanced, highest-value, offering to date. While I wish Rose would give customers the ability to purchase the IEM without bundling in a DAC (and provide multiple sizes of foam eartips), you’d be hard pressed to find a better-balanced IEM in this price range.
The QT-X is an excellent entry in the Rose lineup and won’t disappoint anyone looking for an organic, high-precision, midrange-focused IEM.
As always, happy listening!

Preface:
I would like to thank @gadgetgod and ConceptKart for sending this unit as part of the review tour.

You can purchase it from ConceptKart at the following link (not an affiliate link):
https://conceptkart.com/products/rose-technics-qt-x-iem

Also, I’m not a seasoned reviewer or a seasoned audiophile, so whatever I say is purely my observations and your results may vary.

I’m not the one to usually focus on specifications and numbers. I focus more on how happy I am with the equipment’s sound and that’s it.

Box Contents:

• 1x QT-X In-Ear Monitors
• 1x Blue Rose Detachable Cable
• 1x RZ-500 USB DAC/Amp
• 1x USB-C to USB-C Cable
• 4x Pair Eartips
• 4x Pair Filters
• 1x Earphone Case
• 1x User Manual

Sources used:

• Rose Technics RZ-500 (ESS 9038)
• Dita Navigator
• D16 Taipan
• Qudelix T-71

Introduction:
Welcome to my review of the Rose Technics QTX, the flagship model from Rose Technics, a company established in 2015. Known for its innovative use of novel technologies such as ESTs and bone conduction, Rose Technics aims to create timeless audio products that avoid rapid obsolescence. The QTX epitomizes this effort, designed with care and precision by acoustic engineer Mr. Zeru, formerly of Fostex.
Design:
The QTX sports a sleek and sophisticated design, available in several finishes, including the standout Obsidian Black. Its impressive build quality offers a sturdy yet comfortable fit with a normalized shell that ensures prolonged wear without fatigue. The inclusion of a RZ-500 Dongle DAC, a high-quality carrying case and a selection of tips adds to its premium feel. However, the included cable, though functional, could be improved given the price point of $399.







Sound:
The QTX offers a balanced and refined sound profile, with each frequency range meticulously tuned for optimal performance.

Bass:
The bass on the QTX is clean, detailed, and quick. It features a 10 mm dynamic driver that provides a lush and engaging bass response. Compared to competitors like the Okavango, the QTX's bass is slightly less pronounced in the mid-bass region, but still delivers a satisfying punch without overwhelming other frequencies.

Mid Range:
The midrange performance of the QTX is outstanding, providing clear and detailed vocals and instruments. The mids are well-balanced and do not get overshadowed by the bass or treble. Compared to similar models, the QTX offers a slightly more open and effortless midrange, making it an excellent choice for vocal-centric tracks.

Treble:
The treble on the QTX is smooth and non-fatiguing. While it may not be as sparkling or detailed, it avoids harshness and sibilance, providing a pleasant listening experience. The treble is well-integrated with the other frequencies, ensuring a cohesive overall sound.

Conclusion:
The Rose Technics QTX is a well-designed and decently performing IEM that excels in delivering a balanced and detailed sound across all frequencies. Its design and build quality are top-notch, though the included cable could be improved. With a sound profile that is both engaging and refined, the QTX competes well with other high-end IEMs in its price range. For fans of Rose Technics and those looking for a reliable and well-rounded audio experience, the QTX is a solid option worth considering.

Overview​

The Rose Technics QT-X is a hybrid IEM, consisting of 1 x 10mm Tesla Coil DD and 6 BAs - 2 low/2 mid/2 high configuration. Tuning is vocals and mids focused, with a large sub bass boost and some treble extension that pushes the set into bright territory.


1DD + 6BA Hybrid Design In-Ear Monitors

• Impedance: 18ohm
• Sensitivity: 108dB
• Frequency Response: 20Hz-20kHz
• Connection: 2-pin/0.78
• Termination: 3.5mm or 4.4mm

About me -​

I am a mid 30’s dad, and work full time in IT. Music has been important to me from a young age, consuming as many different types of albums and genres as I could. That is still true today, though my everyday playlists lean most in pop, bass heavy electronic music, metal, and classic rock. I have a treble sensitivity due to years of negligent concert hearing protection (both on and off stage), so my preferred sound signature is warm and bassy. This is just a hobby for me, I’m not a graph nerd and I will always state how and where I got my gear.

I received the “Value Edition” for this review, I would like to thank Andrew and the team at Bloom Audio for giving me an opportunity to review this IEM. I was provided a small discount for my honest impressions, I get no monetary compensation or affiliation links.
Gear used for this review -

• RZ-300m dongle (included)
• DC-Elite
• Qudelix 5k
• Hiby R4
• Apple USB-C dongle
• Stock cable (tested various others)
• Divinus Velvet / Eletech Baroque tips

Packaging + Accessories -​

Value edition box

• QT-X IEMs (Obsidian Black)
• Grey Rose Cable
• RZ-300m Adapter
• Foam eartips x 3 pairs
• Silicone eartips x 4 pairs
• Carrying case
• Vent cover x8

The QT-X packaging is tasteful and well-accessorized. From the logo in holographic gold on the slip cover, to the quotes and images attached on the inside, you can sense from the get-go you are in for a high quality experience just opening the box. The included accessories are generous. The foam eartips were far too small to be of use to me, but I found the silicone ones to be quite nice. They don’t work for me with this IEM (more on that later), but they are like a generic Eletech Baroque in both size and shape and come with an XL! Very nice.

The included carrying case is too small on the inside to be of any serious use, but would be suitable for just the IEM and your choice of dongle. I have yet to have a need for the vent covers, but I do also want to give a special shout out to the included cable. The Grey Rose cable is 4 strands of fabric, but it is not microphonic in use. During my review, I also did not find it to hinder the sound at all like some cables in this IEM price range can. It does not feel like an afterthought, even though its appearance is quite simple. Like the eartips, the Grey Rose also will stick around in my collection for future use. If you have used the QuietSea before, it is the same cable, which I thought was already a ridiculous value for a $50 IEM.

RZ-300m Amp/DAC dongle -​

I want to keep this somewhat brief since it can be purchased separate, but special mention must be made to this included dongle. It packs quite a punch! Even though it’s only 3.5mm, I found this $30-ish dollar USB-C dongle to be quite capable in driving all but my Szalayi properly in my IEM collection. On the QT-X, the volume never went above 50%. It leans warm in the sound signature, which is a good pairing with the brighter edge in tonality. The build is mostly plastic, but the cable is a nice weaving. The button only pauses/starts the music as far as I can tell. The RZ-300m can be purchased on the Rose Technics site, or Aliexpress.

• CS4398 DAC
• Dimensions: 146mmx21mmx10mm
• Weight: Approximately 13g
• Output Power: 75mW@162
• THD+N: -99dB(@32Ω)
• Frequency Response: 20Hz-50kHz (-0.5dB)
• Signal-to-Noise Ratio: 110dB(@32Ω)
• Channel Separation: 76dB@32Ω

Aesthetics, Build Quality & Fit -​

The QT-X comes in a variety of colorful flavors, my review copy is the Obsidian Black color. With gunmetal on the faceplate, the body consists of a high grade opaque black resin. At first I mistook the build quality for metal; it feels far more substantial than most other resin IEMs I have tried. It isn’t filled with resin, but it’s very thick and feels durable.

The IEMs themselves are quite small, for some reason the pictures online make it look like a larger IEM than it is. The nozzle is a bit long, and unfortunately I have some fitment issues with long nozzles and the QT-X was no exception. I was able to mitigate this with tip rolling, and settled on the Velvets and Baroque depending on mood.

On the top next to the 2-pin port is a large vent. I noticed no pressure build up, and they isolate outside noise well once you get a good seal. Overall, the aesthetics and build quality are top notch and only the fit gave me issues, though I will admit that is more my issue than the QT-X. The quality matches the price!

Test Tracks -​

• The Japanese House - Sunshine Baby (vocals/mids + sibilance)
• Fleetwood Mac - The Chain (techs + vocals)
• EPROM - Pineapple (Bass + treble)
• Empress Of - For Your Consideration (bass + techs)
• Joe Hisaishi - Merry-Go-Round of Life (treble)

Bass -​

The bass on the QT-X is simultaneously my favorite part, and the one place that leaves me wanting. Sub vs mid bass. The sub bass is tastefully done, in both quantity and quality. 808 hits are smooth and satisfying, the atmosphere brought by the sub bass always impresses me on drone or ambient tracks.

Mid bass, on the other hand, is largely lifeless. Basslines and kick drums simply exist within the mix if there are other things going on. I am left wishing there was more weight in the mid/higher bass. However, I do not want to be too negative about the bass, because I believe the good outweighs the bad here. My library has a lot of sub bass focused tracks, and the sub bass here is GOOD. It’s well-controlled, accurate and plentiful.

Some examples; on For Your Consideration, at :24 seconds there begins a series of kick drums before an overwhelming amount of sub bass presence shortly after. On Pineapple, there are a variety of mid bass hits throughout but only the sub stands out in the mix and it pulses and booms along.

Mids & Vocals -​

Lush and full, the only way it could be made better was with some more supportive mid bass. Otherwise, hands down this is where the majority of tuning went. Vocals sound rich, female vocals especially but male vocals aren’t far behind. In Sunshine Baby at 1:56, male vocals enter behind a female track before they trade off for a moment and you can get a sense of how they are tuned in the mix.

The dueling guitars at the beginning of The Chain display how weighty the mids can get, building into the vocals where Stevie Nicks cannot help but appear just a bit more than she should. Here you can also sense where the mid bass falls short, as the kick drum keeps the song moving along, but unfortunately not as present as it should be.

Treble -​

The high range of the QT-X is well done, it has nice extension while being on the winning side of “too bright”. Sibilance is minimal and only an issue with an improper tip seal, or is part of the recording. Sunshine Baby is a sibilance monster, and the QT-X handles it with ease, only revealing the most egregious, unavoidable sibilance.

My only issue with the treble is similar to that of my opinions on the bass - it lacks some weight. For my tastes, this really isn’t an issue but there isn’t a lot of oomph to the sharper punches. On Merry-Go-Round of life at 1:50 when the strings kick in, it sounds nice and shiny but it's lacking note weight and air to really give it an extra shine. In Pineapple, there are some discordant treble hits on the hi hat, and it would be more pleasant with that air.

Technicalities -​

Soundstage is quite good, though I was never wowed by it. On tracks like For Your Consideration, harmonizing vocals come in around you and they reach far enough that I have no complaints. On The Chain, you can hear the fingers guitar plucking quite clearly, as well as the muttering so the details are clear, but the full band coming in reveals the soundstage to be a little on the shallow end. All parts of the mix can be distinguished clearly, if properly focused on. Solid techs all around to my ears.

Power + sources -​

I had zero issues driving the QT-X on any source I have. It usually lies at the lowest volume/gain setting in my collection, so I guess one downside is that I forget to turn it down before using it but that is on me!

It is not particularly source picky either. As I mentioned at the beginning of this review, the included 30 dollar amp/dac is more than sufficient to power it, and honestly it sounds great out of the box. It scales nicely as you throw more at it, but I don’t feel it is as necessary as some other sets to use top of the line gear to get the most out of it. Do not feel like you are missing out going unbalanced here folks.

Branding + Pricing + Value vs Deluxe -​

Now, this section is a little… different than my typical reviews, but I feel that it must be mentioned. Shortly after I got the QT-X in for review, I noticed the Rose Technic branding online had begun to change to ROSESELSA. I am not crazy about this name, it’s far less coherent but for now it seems their IEMs are keeping the Rose Technics branding. Additionally, pricing for this IEM seems like a mess and all over the place, depending on which online storefront you are looking at.

The Value edition is
$339
Contains the RZ-300m, a 3.5mm only DAC
Grey Rose cable

The Deluxe edition is
$439
Contains the RZ-550, a 3.5mm + 4.4mm DAC
Blue Rose cable

I cannot imagine the Deluxe version is worth it for an extra $100. If it were up to me, make Deluxe the only model at the Value edition $339 price and it’s an amazing deal in today’s market.

Closing Thoughts -​

I think the term “all-rounder” gets thrown out a bit too much and too often, I certainly know I am guilty of it. It’s an easy, catch-all term to assign something that is a little good at everything. I just cannot find a better term to use to describe the QT-X though, in every sense of the word it’s such a great all-rounder, all purpose IEM.

• Good bass? Check.
• Full mids and lovely vocals? Check.
• Nice treble extension? Check.
• Amp/DAC out of the box? Check.

If you are looking for an all-rounder, bright leaning natural sounding set with solid bass, keep your eyes peeled on the QT-X. Rose Technics/ROSESESLA could be a major player in the game with tuning like this (and some simplification in their branding…), and I hope to see where they go.
Rose Technics QT-X is available on Bloom Audio for $339: https://bloomaudio.com/products/rose-technics-qt-x

Review Of The Rose Technics QT-X​

Introduction​

Rose Technics is a professional brand that offers mid-range electro-acoustic items that sound well in terms of tone and technicality. The firm is based in China and mostly manufactures IEMs, although they have just expanded into the dongle DAC industry. The brand also offers flagship earbuds called Martini, which I was fortunate enough to review. I recently reviewed their affordable IEM known as QuietSea, which I enjoyed so much, and now that I have QT-X, another IEM from Rose Technics, I am certain I will not be disappointed after looking at the graph, but before I go any further, I would want to clarify a few concerns.

Disclaimer​

*This is a review unit, courtesy of Concept Kart. All thanks to them for providing. And as I've said in all of my evaluations, the same is true for this one: all of the concepts I've expressed below are entirely my own, original ideas that haven't been influenced by anyone else. If interested, go to this link.
*I am not associated with the connection, and I receive no financial assistance from anyone.
*For the remainder of the review, I will refer to these IEMs as “QTX.”
*I am using different Ear-tips for convenience and better versatility.
*Finally, I will only evaluate the QTX based on their performance, even though I will explain how it feels and seems physically and aesthetically.

Specification​

QTX has a multi-hybrid driver configuration that includes a 10mm LCP diaphragm Tesla dynamic driver and six balanced armatures (dual 30018 IF, dual 30019 HF, and 33ap007 MF & LF) coupled via a four-way crossover. The shells are made of medical resin, while the faceplate is made of metal. The shells have a fairly lengthy nozzle, but with smaller eartips, I was able to get a perfect seal and comfort for extended periods of listening. The cable offered is called as Blue Rose, and it is a high-quality 5N single-crystal copper cable with proper sheathing. It feels similar to the cable offered with QuietSea, however, it is somewhat heavier and slimmer. The cable has a 4.4 straight termination plug on one end and 0.78mm 2-pin connectors on the other; honestly, the cable feels exceptional and reliable in the hand, and the colour complements the IEMs. The additional accessories include a selection of ear tips, a carrying case, and, shockingly, a Rose Technics RS200 dongle dac. According to the technical specs, the impedance is 18 Ohms and the sensitivity is 108dB. The frequency response ranges from 20Hz to 20kHz.

Sound​

QT-X offers a mid-centric and neutral tone, with a focus on the sub-bass and an overall clean sound. When I first started listening to them, I noticed that whichever source I used changed the quality of the sound without affecting the tuning, which made me understand how versatile they are in terms of technical aspects. The sound is characterized by its cleanliness and transparency, with a particular emphasis in the midrange that gives the vocals and instruments a spacious and well-defined presence. While the graph may indicate that the treble lacks energy and the bass is lean, the tuning of this IEM actually allows the treble to sound expansive and smooth without being dark, and the bass to provide good depth and presence. However, there is a slight lack of warmth and note weight in the mid-bass region that is noticeable throughout the sound signature. Finally, I feel the response has been properly calibrated to sound neutral and accurate, particularly in the midrange, rather than offensive or bright. Let's go further into sound and learn more about it.

Treble​

The treble region differs from what the typical graph portrays; the treble is more smoother and cleaner, with a strong presence in an overall presentation. Though I do discover the limit, when listening to the voices, I notice that minute details that are readily brought up beyond the 4kHz range are muffled, despite the fact that the response sounds engaging and airy. The upper treble sounds expansive and airy, satisfying a listener with the quality of the vocals and instruments; the response is vibrant and engaging, as it reveals no unpleasant features in the mix. The lower treble, on the other hand, sounds same but with a more approachable and apparent quality. The vocals and instruments sound softer and more tonally agreeable, resulting in a smoother response that is delightful to listen to. Tracks like Kohana Lam's Loving Me, Loving You sound incredibly stunning since Lam's vocals are open and light, with clarity in each note while keeping tonal precision. The positioning allows her vocals to provide a more airy and expansive response that reaches far. However, tracks like URU's Kimino Shiawasewo sound a little closed up because they lack air in the upper octaves; it appears that the voices cut off at some point in the upper frequencies since this track is vocal centered; the prominence makes the minor subtleties feel lost, even if the vocals have a fuller sound. Thus, the overall presentation of the treble area is smooth, clear, and tonally pleasing.

Mid Range​

Coming to the mid-range, it appears that the QT-X has a mid-centric response since the notes in this region are quite upfront, particularly the voices, which are positioned front and center, resulting in an engaging response. Regardless matter how the bass and treble regions are adjusted, there is no mid-range spike, therefore no unpleasant characteristics can be heard. The upper mid-range has a very forward and lively response, and both vocals and instruments sound expansive, which makes it more fascinating since details can be heard clearly, yet the weight of the notes makes it sound light but not thin. Because of the way the treble is tuned, the voices and instruments remain well-controlled and within the same dynamic range. The lower mid-range lacks heaviness and weight in the notes, but the vocals and instruments sound clean and transparent. Tracks like The Reason by Hoobastank have distinct and clear vocals with an engaging response, but the instruments, such as the drums or guitar, lack the note weight to feel genuine and organic. Tracks like Only Love Can Hurt Like This by Paloma Faith provide a more linear and open-sounding response, with her serving as the focal point; her vocals are considerably clearer and complete, making the whole response interesting and refreshing to listen to. As a result, the overall presentation of the mid-range is compelling, open, and forward-sounding.

Bass​

When it comes to the bass region, the bass is far too controlled, allowing it to sound incredibly precise and robust in terms of texture and detail but lacking weight and presence in the mix. Not that it doesn't have an affect, but it resolves faster and makes the response sound immaculate and crisp. The emphasis is on the sub-bass, and the mid-bass lacks a lot of note weight, so the slams and thumps are merely apparent and do not provide the natural presence and weight of kick drums or bass guitar notes. On the other hand, the sub-bass is deep and rumbling enough to induce feeling in the ear canals, but the punches are impactful. However, in bass-heavy tracks, I noticed that the overall bass response was cleaner and more articulated, with some increased mid-bass response that sounded extremely well controlled and precise. Nitti's tracks, such as Middle Of The Night, sound incredibly spacious and resolved, allowing the bass to pass through clean and forceful, with superb mid-bass presence. However, complex tracks such as Miliyah's Kono Yumega Samerumade sound weightless; even though her vocals are clear and distinct in the response, the bass notes do not sound dynamic or as emphasised as before, allowing Miliyah's vocals to come across as natural and delicate, which I found very mesmerising. Overall, the bass area is presented in a controlled, textured, and articulate manner.

Technical Performance​

The QT-X's technical abilities are quite excellent for the price; I feel they are comparable to other IEMs in this price bracket, such as the Quintet, Falcon Ultra, and so on. I feel that using BAs resulted in a more sterile response, which improved detail retrieval, separation, and note speed. Let us dive into additional specifics.

Soundstage, Sound Imaging & Separation​

The stage is big enough to sound far and wide, with the vocals front and center and the instruments coming from afar, creating a feeling of amazing clarity and spaciousness. The image is likewise sharp and clear, and the notes are precise and effortless. The separation is excellent since the notes are clear and have adequate breathing room, allowing me to quickly identify the direction from which the sound is coming.

Speed & Resolution​

The resolution is not by far the greatest when compared to its rivals, but macro details are easily revealed, with acceptable micro details surfaced. The attack and decay of the notes are quite rapid, allowing for a very defined presentation without interfering with the overall response.

Sound Impressions ​

Sources​

Sony WM1A - While listening to this pairing, the response sounded considerably farther and wider, allowing the vocals to seem more linear and airier, resulting in a livelier presentation with instruments sounding as if complementing the vocals. The bass was more rumbling and present, particularly in the midbass range. The notes, however, sounded more rounded and genuine.



QUESTYLE M15i - While listening to this pair, the response felt slightly less weighted, with a more open-sounding presentation. Despite the fact that the response sounded light and lean, the notes' presentation did not add any metallic or harsh characteristics of the notes that are typical of a tuning like the QT-X. The treble sounded more prolonged and smooth than previously, but the mid-range seemed less front or in your face, with better-positioned singers and instruments sounding expansive and spread out. However, the response sounded confined in the left and right channels while spreading more in the front and rear. Tracks like Kenka by Kujira Yumemi sounded crisp and clear, without sounding hot or sibilant, thanks to voices scaling very high and chimes presented in your face. The bass seemed more powerful and genuine since the kick drums or bass guitar notes decayed organically after hitting.



QUESTYLE CMA18 - While listening to this pairing, the response sounded revealing, but not in an energetic way, but rather in a more soothing manner, with better contrast in overall reaction. The treble sounded more comfortable, with better extension. The voice and instrumentation both sounded more direct and appealing. The whole response sounded clearer and airier than previously.



Rose Technics RZ500 - While listening to this pairing, I noticed that the response sounded closer and more intimate, with a better grasp on note weight, while remaining consistent but with improved timbre and tonal correctness. The treble sounded crisper but leaner, with more clarity in the notes, while the midrange seemed less airy and more satisfying, with lots of energy and details. The notes, whether voices or instruments, were exposed in a really lively way. The bass sounded controlled and textured.

Tracks​

Millet - Anytime Anywhere
Anri - I can’t stop the loneliness
Kohana Lam - A Few Sentimental
Kohana Lam - Loving Me, Loving You
Uru - Kimino Shiawasewo
Uru - Kamihitoe
Kujira Yumemi - Kenka
Majiko - Kokoronashi
Anly - Sukinishinayo
Kohama Lam - A Few Sentimental
Kohana Lam - Loving Me, Loving You
Miliyah - Kono Yumega Samerumade
Rokudenashi - The Flame Of Love
Yu-Peng Chen - A New Day with Hope
Yu-Peng Chen - Another Hopeful Tomorrow
Yu-Peng Chen - For Riddles, for Wonders
Valentino Khan - Satellite
Kai Wachi - Happier By Now
Jawns - Erotica
ISOxo - how2fly
Kai Wachi - Happier By Now
Nitti - Middle Of The Night
Weeknd - Popular
YUNGBLUD - When We Die(Can We Still Get High)
Bring to Horizon - Kool-Aid
Middle Kids - Bend
FLETCHER - Leads Me On
Loathe - Aggressive Evolution
The Weeknd - Save Your Tears
Sigrid - Burning Bridges
AURORA - Black Water Lilies
AURORA - Runaway
X Ambassadors - Renegades
Lupe Fiasco - Words I Never Said
Macklemore & Ryan Lewis - Can’t Hold Us
Gotye - Somebody That I Used To Know
Jay-Z - Run This Town
Lady Gaga - Poker Face
Lady Gaga - Just Dance
Ladytron - Ghost
Travis - Love Will Come Through
LINKIN PARK - Somewhere I Belong
DJ Shadow - Six Days (Remix)
Hoobastank - The Reason
Ricky Martin - I Don’t Care
Tool - 7empest
Tool - Vicarious
A Flock Of Seagulls - Space Age Love Song
Zack Hemsey - Vengeance
Elton John - I’m Still Standing
The Moody Blues - Nights In White Satin
Micheal Sembello - Maniac
Guns N’ Roses - Sweet Child O’ Mine
A.R. Rahman - Kun Faya Kun

Conclusion​

To summarise this review, the QT-X is a highly professional-sounding IEM tuned to be fairly mid-centric yet with well-balanced treble and bass, allowing for good depth and width in sound, so it does not provide an overwhelming response but rather a spacious and well-resolved one. It is not a neutral or fun-sounding IEM, but it is ideal for those who enjoy singing and desire a revealing and dynamic presentation. Thus, I heartily recommend QT-X, especially now that it has a Dongle-DAC of its own.

Founded in 2012, Rose Technics has a good presence in the audiophile industry in China. With a diverse range of products, including in-ear monitors, true wireless earphones, and headphones, Rose Technics has garnered praise from enthusiasts. They are quite confident about tuning of their iems, some of which are done by notable people coming from companies such as Sony, Fostex, etc. I have tried a few other iems from their lineup and was really interested in trying the top-line iems.

I got a chance to try out the QT-X iems, an iem from their line-up equipped with 1 dynamic driver and 6 BA drivers. It's available to buy on Concept Kart in India here: link.

Alternatively, it is available here on the Rose website: Link
You also can get a pair on the AliExpress Store: Link


Rating Criteria:

I want to lay out my rating criteria before we start off. For me, the primary criterion for evaluating audio gear is its intrinsic value rather than its price tag. A higher price doesn't always correlate with superior quality, and similarly, a low-priced product can give enough listening pleasure for it to be called outstanding. I consider the build, features, and, most importantly, the impact on the listening experience. The fundamental purpose of audio gear is to enhance the listening experience. So for me, this degree of enhancement in the listening experience is a key determinant in rating a product.

Rating below 4: I really won't be posting reviews of such items unless someone has asked for them.
Rating of 4: The product is good, and some users may find it more satisfactory, but it does come with a few caveats, such as price, fit, etc.
Rating of 4.5: The product is excellent and comes with an easy recommendation, reflecting its high quality and overall positive attributes.
Rating of 5: This product can be deemed groundbreaking, a trendsetter, and an eye-opener and deserves a spot on everyone's list due to its exceptional features and outstanding performance.

Configuration (from the website):
Design, build, and fit:

I really appreciate the design of these iems; they are lightweight and well-built. The material feels durable, and the shape of the shells provides a comfortable fit for longer listening sessions. The cable is of good quality, with a 2-pin connection and a 4.4mm adapter included. It's also nicely finished with a fabric sleeve. The case included with these IEMs is of high quality and feels well-built, with good materials for the price. Overall, they have included enough accessories inside the box.

Additionally, there is a vent present on these IEMs to minimise pressure buildup. I haven't experienced any pressure or driver flex issues during my time with them.

The iems have slightly smaller nozzles, and wider than usual ear tips can fit well with them. The tips that come with the package are ample and fit really well on these iems. However, I tried them on Azla Sedna Light eartips, which fit really well.



Sound Analysis:
These iems have a sound that is quite satisfactory. The sound profile is near-bright, with a good emphasis on bass.

Bass stands out as a highlight on these iems. The lows are quite deep, and the subbass has a good body. There is a noticeable subbass rumble, which makes the bass a lot more enjoyable. In terms of bass layering and texture, these iems do really well. Midbass is well implemented, not giving a sense of being scooped out, and has a satisfactory quantity. There is no midbass bleeding into the midrange, and the midrange comes across clean.


Mids are neither too forward nor pushed back. These iems maintain sweetness in the midrange, but I find the mids on the thinner side. It has crisp mids and is good in terms of resolution. The lower mids have good weight, though. The thinness (not much) is more in the upper midrange.

Treble on these iems is done quite well. This region has a good amount of energy and extends really well. The micro-details are well presented. This treble is not harsh or sibilant, but it can come across as bordering sharp for some people.

On the technical front, these iems are really capable. Soundstage has a decent width and spreads far and wide. Imaging is good, and one can accurately position instruments and their placements. The resolution and clarity are very impressive too. The notes sound clean and crisp. I think for an iem of this price, the technicalities are more than impressive.


Source Synergy
QT-X is quite easy to drive and be easily driven even with a dongle and a mobile phone. With a good source, the sound is open and the resolution enhances a bit.


RZ-500 portable dac/amp:
The inclusion of this dac/amp is more than impressive. It features the flagship ES9038Q2M DAC & ESS9603Q amp chip. The sound is as good as other dongles on the market, which are available for about 100 USD. It comes with a USB-C cable to connect to PCs and mobile phones. I, however, had issues connecting it to my iPhone and could not use this dongle on it. There are a couple of other issues, such as the non-inclusion of the volume button on the dongle, which may limit the use-case for this dongle compared to others. However, it is a really standout feature, and I have not seen any other brands go this way.



Conclusion:
In the crowded market of budget to mid-fi iems (less than 500 USD), these iems offer quite a fresh approach. They stray away from the typical tuning that most of these iems have and give a nice sound quality, especially the nice bass on it. The value pack is a nice welcome for the people and gives immense value for money. All in all, these iems are a decent pair and get an easy recommendation from me.