7Hz x HBB ELUA

Donspektor

New Head-Fier
7Hz x HBB Elua - HBBs worst collab so far.
Pros: + Good comfort
+ Good build
Cons: - Bad tuning because:
- Dull in upper mids/ lower treble
- Spicy in mid treble
- Techs just average
- Way better tuned competition out there
- Idk what HBB thought this collab should be, as even it's bass response isn't that good
Packaging and Accessories
Similar to most other budget IEMs, the Elua comes in a thin cardboard case, where once you slide the inside out get greeted with a transparent plastic under which the IEM sits. Removing the plastic gives you access to the IEM in the dense foam and removing it then access to the accessories of which you get the cable and the standard 7Hz random silicone tips and that’s it.


For the price, the packaging and accessories are ok, but still a foam tip or some other tips would have been nice.


IEM Build​

Similar to most other IEMs at this price, the IEM is made out of plastic and consists of three parts: the inside of the shell and the outside. Adding to this is the faceplate that is a simple brushed aluminium piece. All of these parts seem to be glued together well and the seam is very minor. Also well integrated are the 2-pin connectors: while not color matched, they still seem to be glued in well and are in a light angle facing outwards, which is exactly what one would want for IEMS and they have a small red-dot as R indicator. So far, so nice!

The IEM has two pressure holes: one near the outlet and one near the not really readable R/L engraving. And last but not least, the nozzle is protected by two types of filter: one flower shaped meal plate and one dense mesh. I assume both are used to dampen treble as they seem to be more dense when most other nozzle protections I have seen.


Overall, the build of the Elua is good considering the price and I have not complains.


Cable​

Continuing the trend of similarities, the Elua comes with a falt 2-core cable that seems very similar to KZs or even the one of the Zero2. Meaning, it is thin but no terribly thin, smooth and usually doesn’t tangle that easily. It also has a strain-release at the 90° connector, that is a bit too hard to actually release strain.

Going up further, the splitter is a small round dot with the 7Hz logo on it and the chin slider moves way to easily, making it functionally useless. And last but not least the ear-hooks are bent in a about 240° angle with a relatively thick rubberization and the connectors themselves are transparent with a barely readable R/L engraving.


Overall the cable is as expected, without any bigger issues. The only complaint I have is the not usable chin-slider.


Comfort & Fit​

As in my last reviews, I did list the dimensions and specs of the Khan my table of IEM measurements (which included the dimensions, some specs as well as the frequency response measurement): https://docs.google.com/spreadsheets/d/140ptVfmNcFF2ItPFMi_QEqm_J1iilu3EgUZ9YyNdX50/edit?usp=sharing

To make it short, the Elua fits me rather well and I think most people will have no issues with its fit either. The reason for this being that the shell is on the smaller side of things and the nozzle also neither being too long, too wide or in a too small of an angle. I do especially like that 7Hz placed the 2-pin connector in a slight angle, which does help the cable fall into place better and reduces pressure against your ear slightly.

Isolation​

Similar to most other cheaper IEMs, the Elua isolates ok. The reason for this benign the rather thin material. However, due to its good fit, I’d put it a bit above e.g. the Zero2, even though the latter has a noticeably bigger shell.

Meaning, the Elua is ok for most situations, only for busy main roads you’d probably want something better isolating.

Drivability​

Data first, with 107 dB/V @ 1 kHz the Elua is pretty efficient on paper. And while trying my best to make the Elua sound “good”, I found out that better amplification does help here slightly. Meaning, I’d say with a random apple dongle, you will get like 80% of what this is capable of. With better amplification like the BTR5 you get about 90% and with even more power of my D50 III I found it to get slightly better too. Unfortunately, I can not tell you if you need 300mW or 500mW or whatever to get it to the 100% state, as I didn’t try it on the VVT1 due to the IEM being rather warm already.

Sound​

General sound characteristic​

The Elua can best be described as warm V- or U-shaped depending on your definition.

My measurements can be found here:
https://donspektor.squig.link/iems/?share=Elua

Treble​

First things first, similar to the Canta, there is a HUGE peak at 13k with another peak at 8.5k (Canta has a similar peak at 9k). And again similar to the Canta, to my ear the 13k peak isn’t as strong as is measures, but it is there and it adds some not so pleasant spice/zing to the rest of the treble. I also want to add, that to my ear the 8.5k peak resolves more at 9k, but due to it being close to 8k, it can very well shift to 8k for you, which would make it even more spicy than it already is.

Further down, there's a weird dip at 4.5k, with a rather strong small peak at 3.5k. Below that, i.e. from 1k to 3.5k, the Elua is very recessed and that affects basically every instrument or vocalist I tried. Well mixed instrumental tracks thereby suffer less from this recession than not so well mixed tracks of tracks with vocalists, but it is ALWAYS audible and that means the overall treble comes of as very artificial, dark and bright spicy at the same time with a timbre that is always off.



Mids​

And that weird treble unfortunately does affect the mids too: while the graph indicates a good tonality, most vocalists sound “off” too and weirdly hollow, like they are having a cold and some upper-mid tones are simply missing. Granted, if you only have instrumentals, the mids aren’t that bad, as said before in the treble department, but still not good.

The only thing positive I can say about the mids here are the lower mids: they have some warmth, which most people probably enjoy and the bass doesn’t bleed into them too badly.

Bass​

Bringing me to bass. And this is probably the only good thing about the Elua. It is about 12dB from 300Hz to 20Hz and with the additional warmth above 300Hz, it sounds very full and “round”. Unfortunately, it isn’t well defined and also not the fastest. I think e.g. Nuo or Zero2 are more technical here.

Sub-bass while on graph being good, in reality is only ok: it comes of as not very textured and manages a pretty average 2.145min in my benchmark track Mountains from Interstellar.

Soundstage, Layering & Imaging​

Unfortunately, the Elua suffers from its FR rather badly and I can not say that it has either a soundstage that is decent, not does it layer decently, nor does it image well. Overall, definitively disappointing coming from e.g. the Zero2 or the Nuo.

Separation, Dynamics & Coherence (including timbre)​

And speaking of disappointing, the separation also is rather bad, probably again due to its bad FR: most busy lines blend together and sound “mushy” to a degree that I haven’t heard in a long time from renown IEM brands. Dynamics while not being as bad, still come off as slightly dampened and definitely not as good as the Nuo or Zero2.

And last but not least the worst thing about the Elua: its coherence and timbre are WAY OFF! Nothing sounds right, some notes with strings come off as too much while others are completely gone and even when you hear them, they sound just wrong…

Verdict​

I have not clue what HBB thought he’s doing with this collab. Its bad, period. Nothing of this is worth it on no technical point and I’d strongly advice to stay away from it. Yes, you probably could fix the upper-mids/lower treble with EQ, but why would you, when theres the Nuo out there?
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SherryLion

New Head-Fier
A Different Take With Awesome Bass! The 7Hz X HBB ELUA
Pros: 1. Engaging and lively presentation
2. Favors a U-shaped tuning
3. Distinct and detailed sound for under $30
4. Satisfying and powerful bass
Cons: 1. The audio quality is noticeably lacking in terms of naturalness.
2. The upper frequencies appear artificial and unnatural.
3. The sibilance and metallic timbre sounds are particularly unpleasant.

Review Of The 7Hz X HBB Elua


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Introduction


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So, it appears that 7Hz has given serious consideration to the budget segment of the IEM market. They definitely offer different tastes and preferences to audiophiles. I genuinely believe that these recent releases have not only catered to audiophiles but also to gamers, although I’m not sure about the one I’m reviewing in this post. Elua, a budget-friendly IEM, is the result of a collaboration between the renowned audiophile figure known as Hawaiian Bad Boy and 7Hz itself. I’m fortunate enough to review these, but before I proceed, I’d like to clarify a few points.

Disclaimer


*Since this unit tour was organised by the kindly people at Linsoul, I am grateful to them. 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 “Elua.”
*I am using different ear-tips for convenience and better versatility.
*Finally, I will only evaluate the Elua based on its performance, even though I will explain how it feels and seems physically and aesthetically.
*Please understand that all opinions expressed in this review are my personal perspective and are not intended to offend anyone’s beliefs or experiences. Therefore, I kindly request a respectful and thoughtful approach to this review, even if it differs from your viewpoint.

Specification


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Elua is a dual dynamic driver in-ear monitor (IEM) that features two drivers on each side. These drivers are 8mm LCP dynamic drivers and 10mm LCP dynamic drivers. The shells of the Elua are transparent, with a grey faceplate engraved with the brand name 7Hz and the IEM name Elua. The drivers are visible through the shells, which is a nice touch. However, considering the price, there are other IEMs that offer better built-quality shells. In terms of comfort, fit, and isolation, the Elua is good. Using them for extended periods didn’t cause any discomfort. The included cable is decent, but it doesn’t quite match the quality of other IEM cables. It’s a two-pin 0.78mm cable with a 3.5mm termination. The Elua comes with a variety of ear tips other than the cable. Moving on to the technical specifications, the impedance is 18 Ohms, and the sound pressure level is 107dB. The frequency response range is from 10Hz to 20kHz, and the total harmonic distortion is less than 0.5 percent.

Sound


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So, most of the 7Hz releases are a bit hit or miss. They’re always trying to bring something new to the table, which usually appeals to different groups of audiophiles. From Sonus to Elua, they’ve had neutral to bass-boosted IEMs until now. But Elua is different. It’s a unique approach to finding these. I’m a person who likes listening to IEMs at lower volumes. Sometimes, after a while, it can get boring. But Elua brings that fun and engagement back. It’s so clear and U-shaped that it feels like there’s air and space in the mix with plenty of punchy and thumping bass. Now, I’m not saying everyone will love these. They’re not for everyone. Some of my friends tried them, especially gamers, and they didn’t like them. They didn’t like how the treble is so elevated while the mids are around 800-2k is recessed. Even for me, the more I turn up the volume, the less I can stand it. But not that it hurts or anything. People who aren’t sensitive to treble or who prefer hip-hop, EDM, or pop will definitely like it. But let me explain why.

Treble


From my perspective, I believe this IEM isn’t quite up to par, especially in the higher frequencies. At lower volumes, it has a nice, airy quality that’s great for bass-heavy music. But when you turn it up, it gets a bit tinny and sibilant, which isn’t ideal for audiophiles like me. However, I think treble enthusiasts might enjoy it. I can’t say for sure though. One thing that really caught my attention was the upper treble. It brought out a lot of tiny details in the music, but it also made the contrast a bit too much. I didn’t expect that for the price. The airiness and spaciousness are nice, but the response just doesn’t sound natural or stimulating in the right way. When it comes to vocals and instruments, the metallic timbre is unavoidable, especially with instruments. But the vocals sound open and lively, which adds a sense of clarity. The lower treble is much more manageable, thanks to the bass influence. It gives the vocals and instruments a nice lean quality. Overall, the vocals and instruments sound well-expressed and open, but they also have a slight sibilant quality. I tried to find a song that would suit the IEM, and I stumbled upon Kokoronashi by Majiko. It was surprisingly non-offensive and brought out a spacious stage sound with great clarity in the vocals and instruments. I really liked listening to it, but I also found a lot of tracks that were treble-sensitive. For example, Gypsy by Fleetwood Mac sounded unnaturally airy and nasal in the vocals, even though the instruments had a lot of clarity and vibrancy. The vocals weren’t as good as I had hoped. So, in summary, the treble region has some good qualities, but it also has some flaws. It’s clear, but it’s also unnatural and airy sounding.

Mid Range


So, here’s the thing - I think the treble could’ve been better if the midrange was a bit more forward. You see, after using a parametric equalizer and tuning it to a more Harman-like sound, it really improved the overall quality of the set. I started to enjoy it a lot more. But the reality is, the upper midrange has this unevenness in the synergy and a subdued overall midrange that makes the upper frequencies sound artificial. The upper midrange resonates well with the lower treble in energy, but it’s at a comfortable but less consistent level. The vocals and instruments have great air and openness in the mix, but they sound off in tone and timbre. Most of the instruments sound okay, but the vocals have these unnatural characteristics. I wish there was a bit more warmth, but that wouldn’t have solved the whole issue. Now, I don’t have much to say, but listening to male vocals at least sounds great, especially on hip-hop or bass-heavy tracks. There’s more to male vocals that comes forward better in terms of clarity and expressiveness. The notes have more distinction, and compared to the female vocals, they’re more expressive with these artificial and nasal characteristics. Overall, the vocals are a hit or a miss for people. I believe this response was achieved to create a spacious sound with good depth and width in the mix, but it did affect the tone and timbre of the mix. When I saw the graph, I had a little hope that recessing the upper midrange would bring more warmth in the lower midrange, but it didn’t. There’s isn’t much raise above 300Hz, which could’ve brought more weight or wholeness to the notes. In my opinion, it would’ve given better tonal quality, but the amount of subdued range from 800-2k kHz doesn’t allow it to. And the reigning subbass hinders the emphasis of the mid-bass warmth, which I’ll talk about later. Hockrockb’s “Labyrinth” has a distinctive female vocal sound with a sharp ‘ss’ quality that adds sibilance to the mix. Despite the shimmery and expressive instruments, the artificial sound presence is noticeable. Tom Petty’s “Free Fallin’” sounds refreshing and lively with airy vocals and openness. The notes and tonality are spot-on, but there’s a part in the track that’s both lovely and masking. The snare hits parade builds to the chorus, exposing all elements simultaneously but also masking the space and anticipation they created before with any of my favourite IEMs. The overall presentation is uneven, with an off-key and tonally weird midrange.

Bass


“These have bass, yes! Too much bass? Yes! How much? Yes!” To be honest, that’s not what I meant, but most people will agree with what I meant to say. My friends loved the bass and had a blast listening to bass-heavy EDM, hip-hop, or metal tracks. But at times, the bass got too much when listening to pop or rock. How much is what everyone will be wondering. From my perspective, that doesn’t make sense. As with some genres, it’s okay, but with others, it over-emphasizes the bass. The bass is heavy and can be said to be a bass-head IEM. HBB himself gave his initials on this IEM. It’s guaranteed to have bass emphasized. And it’s not wrong to have. The emphasis is in the sub-bass region with a good deep extension and less rumble and more powerful punches and thumps. The bass’s slaps sound hard with a good meaty texture. Even the drums and snares sound on point and very forward in the mix. It’s a very tasteful blend, and metalheads will definitely love these for it. The same can be said about hip-hop and EDM. The drops hit hard like this is meant for these genres. Nothing comes out wrong, but it’s fun and grooving. The notes aren’t very detailed or well-textured, but they have great impact and emphasis in the mix. And the IEM is tuned in a way that makes the bass or treble more forward, making the bass more presentable and involved. Listening to tracks like ‘Stronger’ by Kanye West sounds really fun and nostalgic as the drops have heft and boom to them while Kanye’s vocals are clear and crisp. Overall, it produces a sub-woody yet clean response. Also, the track ‘Run This Town’ by Jay-Z sounds distinctive and clean between all three vocalists and the instruments while the bass hits pounds on the eardrum. So, all in all, the overall presentation of the bass response is satisfying, thumping, and powerful.

Technical Performance


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Now the technical aspects are what I would not expect best put into an IEM under 30 dollars, but most people do care about it, and I have seriously taken the impression of these, which may sound impressive, but at certain areas, it will not. The stage separation is pretty good, while the imaging and resolution are not. Let me expand on it more.

Soundstage, Sound Imaging & Separation


The stage is wide enough to sound wide and deep, but it’s not very surround-sounding. The response mostly feels present in front of you rather than around your head. The imaging isn’t as sharp and precise I expected, but it’s clean enough to give you a better understanding of all the elements happening together. The notes are distinct, but they’re not the best as there are some instances where they felt masked and not well acted in the mix. However, the direction from which the sound is coming is well pointed out.

Speed & Resolution


The definition and resolving aspects of this IEM are not its best features, but the macro details are well-presented. The micro details could be better, though. The attack and decay of notes are fairly paced, which does sound somewhat resolving, but it’s not the most impressive.

Sound Impressions


Sources


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Sony WM1A -
When I listened to Elua with WM1A, the sound was spacious and more unique with better imaging, separation, and stage. The bass was more grounded and a bit back in the mix, while the treble was well-controlled and balanced, even though the response sounded warm and laid-back the spakle and shimmer at top didn’t fade away. The notes sounded complete, which helped the female vocals sound less sibilant. Overall, the sound was better in terms of tonal balance and quality, but it didn’t have that same fun and excitement as when I listened to Elua with M15S. Another thing I noticed was that the lean quality still felt there.

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FiiO M15S - When I listened to Elua with M15S, the sound was super vibrant and energetic. The treble and bass were forward and clear, with a nice texture and clarity. But there was sibilance and tinny sound that came through. Overall, it sounded controlled and well-defined, and it also showed off its offensive capabilities.

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
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


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Elua is a bass-head IEM that offers a unique tuning that brings hip-hop, EDM, pop, and metal genres more love. The more you listen to them, the more you’ll understand what kind of playlist they’re perfect for. While they’re not audiophile-grade, they’re definitely great for bass-heads who enjoy heavy bass drops. If you’re a fan of EDM, hip-hop, or metal, I highly recommend them.
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Redcarmoose

Headphoneus Supremus
Pros: Implementation of a 10mm and 8mm LCP dynamic driver team
Superior note-weight
Great timbre
Still offering the stage size and separation of a hybrid to a point
A lot of bass
Still holding a style of balance
Fluid decays
A fairly good stage, holding treble imaging of items on the outskirts at times
Over all warmth in tonality, shunning the fast transients known to be held in BA drivers
They went and included extra Pinna Gain focus and treble energy into highs for balance
More golden toned layers from the 8mm DD, not spiky small details
The words for the day are lush bass
Cons: More golden toned layers from the 8mm DD, not spiky small details
Not the most detailed, more musicality over finite details
Not always the most separated, even for this price-point
Not an all-rounder, seemingly doing EDM better than a few other musical genres
A lot of bass presence
Some would comment the Elua is a little murky when you combine the bass with the lesser detail
Over all warmth in tonality, shunning the fast transients known to be held in BA drivers
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7Hz X HBB Elua
Redcarmoose Labs January 9th, 2025

$29.99


https://www.linsoul.com/products/7hz-x-hbb-elua
  • Impedance: 18Ω
  • Sound Pressure Level: 107 dB/V @ 1 kHz
  • Frequency Range: 10–20,000 Hz
  • Total Harmonic Distortion (THD): <0.5% @ 1 kHz
  • Transducer Type: Dynamic X2 8mm and 10mm
Hilariously I have reviewed 10 7Hz IEMs and a Dongle. This being my 12th 7Hz review, I see no end in sight. That this 7Hz company has made it their mission to populate the world with personal audio. In 2021 7Hz released the 14.2mm Planar magnetic "Timeless" IEM. The Timeless gained a reputation for best technical resolvability under $300.00. Not only was the Timeless IEM incredibly popular, it jump started the whole 1st Planar IEM craze. I never got a chance to hear the Timeless Planar, but don’t feel sorry for me as I have somehow heard my share of 7Hz gear. Looking back, probably the most high profile release for 7Hz besides the Timeless IEM is the 7Hz Zero. Coming out in early August of 2022 the Zero, much like the Timeless, offered the public at large a way to access the audiophile IEM experience for unprecedented value. Well………$19.99 was the original 7Hz Zero price, they still make and sell the Zero but the price has gone up to $25.99. So this 7Hz X HBB Elua comes in at $10.00 more than the original price of the original 7Hz Zero IEM. Now keep in mind this Zero is nothing short of a modern day miracle in sales.

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Since it’s introduction to Head-Fi the 7Hz Zero has garnered 78,000 clicks, making it the most researched IEM in Head-Fi history. So while 7Hz has investigated numerous ways to make IEMs, it is nice that they still try and bring a new flavor to the budget market. What they did here is add HBB’s (collaboration) bass, in a way going and offering contrast to Crinacle’s (collaboration) Zero 1 bass reserved stature. Yep, while the Zero 2 went to add bass to the vocal ability, there is still this uncanny entity forever known as the 7Hz Zero making waves even now for its ability to generate a giant 3D stage with midrange textures a plenty.

Redcarmoose 7Hz history so far:

https://www.head-fi.org/showcase/7hz-salnotes-zero-universal-iem.25980/reviews#review-28978
https://www.head-fi.org/showcase/7h...ioko-universal-iem.25990/reviews#review-29004
https://www.head-fi.org/showcase/7hz-legato.26411/reviews#review-30615
https://www.head-fi.org/showcase/7hz-sonus.26673/reviews#review-31895
https://www.head-fi.org/showcase/7hz-x-crinacle-zero-2.26878/reviews#review-32694
https://www.head-fi.org/showcase/7hz-aurora.27147/reviews#review-33904
https://www.head-fi.org/showcase/7hz-aero.27329/reviews#review-35273
https://www.head-fi.org/showcase/7hz-five.27428/reviews#review-35205
https://www.head-fi.org/showcase/7hz-artemis-39.27382/reviews#review-35084
https://www.head-fi.org/showcase/7h...c-dd-universal-iem.27710/reviews#review-36167
https://www.head-fi.org/showcase/7h...anar-universal-iem.27766/reviews#review-36457

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Left to right:
7Hz X HBB Elua, 7Hz Timeless II and TRN TA1 Max

Comparisons:
TRN TA1 Max $46.00 1DD X 1Knowles BA Universal IEM
https://www.linsoul.com/products/trn-ta1-max

7Hz Timeless II $229.00 Planar Universal IEM
https://www.linsoul.com/products/7hz-timeless-ii

Why did I choose these for comparisons?
1st off it is good to understand how a 2DD IEM can sound in relation to a Planar IEM. Also there may be a few 7Hz fans that are wondering if a $29.99 IEM is worth getting if you already had the Timeless or Timeless II. Also some may be interested in only getting the Timeless II, and want to understand what it does differently in relation to the Elua. The TRN TA1 Max is a wildcard. Yep, an IEM I personally loved but haven’t talked about for years. It may seem like it doesn’t belong here, being it came out in May of 2022. Yet I still feel this is a great comparison, since now we are looking at a Knowles BA and 10mm driver. Plus I just like the word “Max”!

I long for those days back in 2022 when I was a young and unseasoned reviewer, still enthusiastic about $46.00 IEMs. And not to say I’m not enthusiastic today, it is just this is the natural progression of hearing (and documenting) over 200 IEMs.

TRN TA1 Max
1DD+1BA Knowles Hybrid Driver Earphones

  • Beryllium-Plated 10mm Dual Magnetic Circuit Dynamic Driver
  • Trn Custom Knowles 33518 Balanced Armature
  • Half-Open Balanced Pressure Relief Cover
  • High Quality Silver-Plated OFC Copper Cable & Rich Accessories
  • Ergonomic Design
TA1 Max v 7Hz X HBB Elua:
Today I spent a while deciding on my rig. As the Elua included cable is nice, and fully gets you in the door of what the Elua is about, it is just they can only go so far with the cable included with a $29.99 IEM. As this was no task that I took lightly, I tried a few cables and contemplated both the outcome and the idea of an aftermarket cable. Finally I landed on the SIMGOT AUDIO LC7 cable. Such a cable comes with modular plugs allowing access to both 4.4mm and 3.5mm amplifiers in the Sony WM1A. I am in 4.4mm and using my favorite ultra wide-bore ear-tips. You will see the tips though-out this review as they seemed to add stage and briskness to the Elua.

Meaning there is enough Elua bass to go around here, and while I always admire the stage from these ear-tips, often you don’t always have the IEM form factor to put these shallow donuts in place.

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TRN TA1 Max:
Here I have started with the Elua as to do side-by-sides. As it turns out the TA1 is way more efficient. I mean that was something to note early on is that the Elua demands a little juice, probably more than you would expect. Later I will disclose phone use with Eula. The first really noticeable thing is how the BA in the Max is truly working over time. Meaning there is an added spacial effect to how imaging is more spread-out into the stage. My ideas from years ago regarding the Max hold true, and while very different from the Elua, it really is the opposite here. Showing that there is another life out there for other IEMs to procure. Also I need to disclose how the LC7 cable is warm into the lower midrange and offers a stifled treble and midrange energy. As such there is actually no LC7 color letting the IEMs be themselves, yet this cable can be boring with too dark of an IEM. Lucky today all three IEMs are not that way.

TRN TA1 Max:
Look I don’t care if you wake-up to the fact that the TA1 Max is incredible. Though I’m not sure why this was not more popular around Head-Fi at the time. A deep kick bass, offered as in contrast to these highly technical treble and midrange imaging. The main thing is there is Max bass detail and speed that is way, way above the price point. Though some may have issues with the shape and size, as the Max IS different! Going back to the Elua I totally notice how it is not as bright, showcasing a bigger bass, and bigger stage, maybe? It is that this stage is larger in the mid bass and bass. While surprisingly offering those high-up treble artifacts into a more golden light, while still offering detail, there is a more congealed composite, which is the 8mm doing its thing, opposed to a BA. While the gift here is that while the Max was balanced and not hot, here we are even bathing in warmer waters, yet slightly of a murky nature in comparison, as nothing out there does what the Knowles BA could do, other than another Knowles. And that is the thing…….the Elua makes points in even better timbre than the Max, but the timbre of the Max is grand. Smoother and even softer Elua with slower bass transients, and believe it or not lesser bass technicalities for the Elua. This is what takes place when you unearth a little monster (an open back IEM) from your collection.

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7Hz Timeless II: :hearts::hearts::hearts:
Look, the above comparison is what it is. Do I like the TA1 Max better? I probably do! Still in this world the Elua has its place being it does so much right. So let’s look at what the Timeless II does differently from the Elua. This will be of value if you are maybe on the fence to where you are wondering just how much more the Timeless is! Jeez, I mean I just did this Timeless II review, and at this point I’m blown away once more. Here we have a bigger stage than the Max and Elua. But that stage is filled with better resolution allowing for visualization into the outskirts of midrange and treble. Meaning there are layers upon layers of information that both the Elua and Max left out. Sure it is a way more, many times more money IEM. Only at this point in time I am not noting any such drawbacks at all. Using the included gold nozzles and something about these ear-tips is opening the stage one more level than what I used in the review? Wild? To get down to business here, there is less bass, yet a more clear fast low-end. Such an action gives way to this visibility of imaging…………everywhere. Treble items are that much more itemized and structured, to coincide with wonderful air sound effects broadcast to a separate stage inside, or better said outside the stage. The results are simply the desired pace and tempo shown, you know when there is room for all, but more than that these separate tracks of vocals and instruments have inside details and textures………….I could go on…..only I didn’t realize how much better the Timeless II really was?

Summery:
Maybe you didn’t get anything out of these side-by-sides? Yet at the same time the side-by-sides helped to define what the Elua is and what it is not. If anything, this is a tough world we live in, a tough world for IEMs anyway……….with 50 of them (at least) coming out every month, and more on the way. I mean this is why I do side-by-sides in the first place, to put stuff in order of quality, for better or worse. What I learned (in part) I already know, that the Elua will make points with decays and timbre, but not offer the largest stage or fastest transients. There are really not that many multi-DD set-ups, making the Elua sound somewhat original. Elua has extra stage and separation over many single DDs. It is just any of the BA brightness is just not a possibility for the Elua. What goes with that is the extra stag placement BAs just seem to do on there own. Yet the surprise of the day was how the Timeless II showed even better performance than ever. Sure it is easy to beat-up these lower cost IEMs like the Elua and TRN TA1 Max...........but at the end of the day, it simply is what it is!

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Music:
Here is the fun section, the section where I simply experience a user scenario!


Rammstein
Angst (RMX by twocolors) single

48kHz - 24bit

Timestamps only pertain to digital file, not video.
Here we are given the full range of tones, for an EDM song. As talked about in the very impressions ever posted about the Elua, the idea is that we not only have bass but are rewarded with a style of balance. This balance.......meaning really more that electronic or acoustic cymbals, and higher occurring sounds get adequate placement and representation in the Elua stage. This is actually more noticeable than vocals, in placement. What this means is there is a level of charming smooth and still separated items, that occurs due to the 8mm allocation in crossover.

Yep, two drivers are offering slightly more separation and excitement than can at times be found with one. This difference is small but noticeably there, as you can kind-of tell the sound is not like a single DD. Still amongst this replay is shown a careful treble roll-off that is just about trimmed enough, to where if it was any more we would have murkiness. The best aspects of the Elua are the fact that EDM has big authority and deep bass. When this starts at 00:00 you can get a clue (in places) as to the high-hats. Then at 00:53 the charm of the synthetic drums is upon us. Yep, this icy white cymbal strike has been toned down to an amber level, yet fully dislocated into its own placement. And upon closer inspection you see it is layers of sounds, darker sounds which give it density. At 0035 you can hear airy effects sounds out to the side, only the Elua doesn’t separate them like the Max or Timeless II. And that is the one thing you have to realize, that while the stage is nice, no way is it super large in size. Medium large, with an extra push of lower midrange girth, as not at the top holding any sparkly air. Yet all this is water under the bridge as far as EDM listeners are concerned. Yep, they want big bass and a smooth high-hat. And yes, we have all that, at best, that is the darn best thing that Elua does……..all day long. You see Dance music is mixed slightly differently than regular music. In a dance club the music must have a deep throb, but also contrasted with bright treble hi-hats to kind-of create rhythm. This resulting interplay of sounds creates a groove that often gets pushed back into the attention span of listening focus. Meaning it needs to be there, but due to repetition never needs to change much. It is the layers on-top that create the interest for the listener, yet here there is also an additive of a rolling bass line. Yep, this live sounding run takes noticeability when it walks off course. Throbs starting also at 00:53. Yet too is the main middle toned synth line……….So it is the interplay of the bass drum, the middle synth line and the high-hats. Though the kicker is the slight changes to the bass occurrence, not the drums. This walking of throb is simple but effective and that while this $39.99 Elua is not everything, it at least communicates the most important aspects here, to do with rhythm. That and when the air-raid siren hits at 01:04…………..Elua gets that too. At 01:09 there has been a specific change-up to how the hi-hats are positioned now, it is a kind of ear-candy to all of a sudden be surprised at this seemingly unmovable, yet repositioning of high rhyme accents. The genius here is the instrument has been reworked into a new form of accent owning a new place in the beat. Also it is more natural and correct now in position.……….to where upon closer inspection, there is an added beat also, a both stage change and beat change, that comes about as rewarding and ultra-correct. It is these subtle splashes off to both the right and left in beat that is where the money is here. That while the stage is not the biggest, there can be rewards of beautiful separation and timbre…….fast movement and a rhythm to behold.

At 01:41 we have the classic break-down…….leading into silence of the beat. Though even though the bass drum is now gone, we have the synth bass taking even greater noticeability and the hi-hats. This panning from left to right, left to right. At 01:57 the vocals emerge with Till Lindemann taking front and center. Finally we have the very needed chorus of the song, a fact that at times EDM keeps locked-up and uses sparingly, to concentrate on different dynamics of music. And with this area I’m guessing this (missing the down-beat) is 100% almost of the original song? After checking........like the best remixes, this song is way simpler than the original. At 02:46 the air-raid siren hits again and so does the beat!

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Robert Miles
Dreamland
Children

44.1 - 16bit
This song takes the cake with Eula! Lushness is the best word to describe the sound! :icecream:


There is this deep bass throb, if you hear the song you will know which one I’m talking about, you can’t miss it. And sure, different from anything the TRN TA1 Max can do, or even the Timeless II can attempt, we have that more organic bass, not the most detailed, but we are witnessing an added dimension of both tone and technicality that for some, maybe this amount would be the only way to go. I can say it is satisfying and fun, that there is an extra addition of bass energy that makes this song become a memory, and such a memory that you want to experience it over and over. When I think back about so many HBB IEMs I have reviewed, it normally takes me a day for my ears to adjust back to normal, and even my bass heavy Gym IEMs seem to be low on bass. Yet this is the first HBB that is a little more balanced and a little more careful to not fully go crazy with bass amounts. Sure this is on the side of bass head levels, but not as much as normal.

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This offering lets more of the midrange flow into noticeability and resulting balance is found. In many ways I would like to see other manufacturers continue with this idea of HBB collaboration, getting us almost (almost-almost) mainstream results. At 00:36 the Dolphin clacks are something of an event. And the stage, my gosh, this is better than the last song! At 00:42 when the piano hits it is a welcome additive and truly special as timbre is dead on, also the size of replay is not something I could have ever guessed? Wild! Just Big, big and friendly. The main thing that DDs do is decay well……if anything they possess it is correct decays. They are the decay animals of the IEM world. And of course here we have that! But more than that there is nothing overly stark or brittle about this piano, the notes are natural and correct, holding way more technicalities than I could have ever given the Elua credit for. What I’m trying to say is this does not in any way sound like a $29.99 IEM, it is the stage size and tone that you are paying for. At 02:03 I’m coming to realize that the decays are of special value here, being there are even decays far back in the mix that seem to grab hold of such ability? At 02:20 the beat drops, and while not as dynamic or as authoritative as (the previous song) Angst held, it is still relatively deep and throbbing. The results also emulate the matrix of hi-hat to bass drum and the bass walking line approaching. That here though there is a between beat throb that works to propel the song forward. And that is really the benefit of correct EDM, that we want a feeling of motion in the air, a feeling of energy, never drowned-out by too much glare or too much murkiness, and that my friends is exactly what we have here today!

Cable:

The included cable:

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We have already gone over the fact that while the included cable is nice, and gets us basically in the door as far as Elua’s charms, though it is only 3.5mm…………use of a 4.4mm cable accesses a completely different amplifier in the Sony WM1A. As such different bigger 4.4mm amplifier capacitors are used. The way it is formed is one side of the amp card has 3.3mm amplification, and the other side offers 4.4mm balanced amplification. So after using the SIMGOT AUDIO LC7 in 4.4mm I tried for four days using the high-end cable that came with the 7Hz Aurora. How could the Aurora cable not be an improvement with 2 handwoven shares, 35 cores Liquid nitrogen single crystal silver + 196 cores Furukawa silver copper alloy plated silver. Truth to be told the Aurora is both a more detailed affair, but how they concentrated efforts on the lows in the Elua display, they chose more involvement into the Aurora highs.

Aurora:
1X 12mm Composite Dynamic Driver
2X custom created BA drivers for the midrange
1X 6mm micro Planar driver for highs

3 way crossover network

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Obviously the $399.00 Aurora has an improved cable, but what would it be like to use it with the Eula? Believe it or not the Aurora included cable came off a little more resolving than the LC7. Now that is not saying much (as described earlier ) the LC7 includes big and added effective lower midrange girth, with a tad downplay smoothing of treble and upper midrange. That is just how the LC7 is with all IEMs, except it does these tricks without truly coloring the sound. So the basic personality of the IEM always remains intact. Here the Aurora cable went and showcased a more reserved lower midrange, and slightly brighter upper midrange and treble.

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I’m not sure if 7Hz will ever market the Aurora cable separately, but I sure hope they do. Not only in the 7Hz Aurora cable a looker, it has modular plugs to adapt to 3.5mm or 4.4mm too. Also it should be noted that of the tests with the Elua the Aurora cable goes forward to enrich the sound, but there may be new cable tests to see if a silver additive would take the sound into even more resolution.

In comes a pure silver cable:

This was primarily a test based on my personal curiosity. Meaning I actually didn’t know what would happen.

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In comes the LAVRiCABLES Master Cable V4:
First off I would not even include this excursion into silliness, except the 7Hz X HBB Elua has in it to scale. And scale dramatically at that! Here I finally found all the pace, clarity and stage. Now it is debatable how much common sense there is to matching the $29.99 entry level Elua with a $346.82 pure silver cable? But this ends one of the extreme moments of me silly trying to get the most out of an IEM and learn where we could in-fact go. Using the Sony WM1A with Mr.Walkman’s firmware and no EQ. Placing my favorite wide-bore donut ear-tips in place was nothing short of a miracle.

Now the bass was both authoritative and tight. The stage was the biggest found today, and the best part was the airy quality to the treble accents. This resolved pace and clarity was nothing to laugh at. This is actually a set-up I would love to take to a Head-Fi meet just to place the Elua in people's ears and witness their reaction. I mean in this regard probably 90% of the sound is resulting from just the drivers. That in a way I’m still going with HBB’s tune, yet what I added was a cleaner sound and a huge boost in technicalities! Even with the amount of IEMs I have on hand I would be perfectly happy to listen to this exact set-up all day long, and tomorrow, all-day-long, yep, it is that good. Why? There was found a balance and a lushness still, yet normally the Elua is a little murky, just slightly foggy. Yet with cable, ear-tip and DAP set-up we are now traveling to a new part of town, the upscale part. Truthfully I didn’t even know the Elua had it in her to climb to such levels. Because often either the Pinna Gain can climb too sharply or worse, with some tunes if you position the bass back, it removes the soul of the IEM. And truly when I came-up with this idea to use the Master Cable V4 cable I was in fear of such outcomes. To tell you the truth I’m totally surprised, more than normal this surprise exists. The Aurora cable opened-up the stage and did wonders to improve the sound, except really that cable is better suited to where it belongs……….on the Aurora smoothing the highs out, and adding clarity. The LC7 was used through-out this review, and in many ways the Master Cable V4 and the LC7 are true opposites. In that the LC7 is adding lower midrange girth, and diminishing the treble and upper midrange. Where the Master Cable V4 is promoting this overall clarity, both in the lower regions bring visibility as a way to see into the fog, then the Master Cable V4 is adding stage in every direction, then finally the highs and midrange are from an LCD 8mm DD, which seem to love the extra boost is energy here?

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Build:
Probably the biggest complement that I could give the Elua is fitment. This shape being it has rounded edges, but also on the small side, but not as small as the TRN TA1 Max, where it is almost too small. Such a Elua shape can almost do no wrong allowing any style of ear-tip as well as cables are easy to replace. The nozzle length seems to be just right too. While 7Hz is going with their angled 2Pins which means a hooked cable gets turned-in. Really in so many ways this fits the bill as the ultimate sports IEM, plus the tuning has that extra low-end which fights traffic noise when out and about. Looking at the pictures you can see two very clear vents, and this may be a time when there are even more, but it is hard to exactly tell. Though I’m guessing maybe three? The IEMs are marked with right and left markers, and the screens are set-in so as to not easily be pulled out. Though do be careful using cleaning cloths, as the “flower” symbol has spikes that can grab onto the fibers of the cloth. Luckily if that ever happens the filters can be placed right back in, if you have hold of them! My suggestions are don’t use regular cleaning cloths, but use thin fibered eyeglass cleaning cloths. Weighing in at only 4 grams each, they are some of the lowest weight IEMs you can find.

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Packaging:
If you look closely, 7Hz are not only providing a range of ear-tips sizes, but the nozzle opening is different among them. Also of the tips you get some are of a different height, though be warned that in general these ear-tips fall into the smaller size category, and looking over the Timeless II tips, we are awarded with a few bigger sizes.

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Phone use:
Anyone and their Mom would disclose that the volume levels reached by simply cellphone output are more than healthy for the ears. Meaning if you have a kid and are worried about him or her blowing their ears out with an IEM, this Elua is a safe purchase. Yep, also you can’t help but realize that the tone is more than complete, it is not murky or boring or dull, yet actually fun and involving from a cell phone. I can’t help but think they took cellphone use into account when sound designing this IEM. I mean on a scale of 1-10 and 10 being great from a phone, the Elua gets a solid 9. Though keep in mind that it never gets totally loud from a phone, but comfortably loud. Where the Elua is way loud enough for normal use, and you never feel short changed to its volume levels and stage size, and tonality. The difference from an audiophile DAP would be a bigger stage, cleaner contrasts and slightly better separation and pace. Still the more you listen with a phone the more your mind adapts to the signal generating the level 9 score!


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Conclusion:
I will spill the beans……OK. Yes, I played many other styles of music with the Elua, and yes the Elua performed, but really my favorite was EDM, it was just a remarkable way Elua did this, that there was a magic held. So much so that I personally don’t hold the Elua as the most well rounded IEM. With that said, adding the
the LAVRiCABLES Master Cable V4 changed most of my perspective about the Elua. Probably very few are going to add such a cable, yet the test as least gives credibility to the ideas that you can change the Elua to get a new and better pace and lesser murk, if wanted.

First impressions
7Hz X HBB ELUA
X2 DD

$29.99 USD
https://www.linsoul.com/products/7hz-x-hbb-elua

So this is an inexpensive creation, $10.00 more than (the original price) of the 7Hz Zero, and 1 extra driver too. Plugging it in with my super wide-bore donut ear-tips and going for 4.4mm with the SIMGOT AUDIO LC7 Cable added to the Sony WM1Z I am relatively happy. Why? Well it turns out that while the bass is thick and an L-shaped signature, it is still relatively clear. I mean I’m the first to stand on my carefulness into not always accepting HBB collaborations as perfect, I mean I don’t think he is a tuning GOD, even though he seems to have more collaborations than anyone walking the Earth. :)

Still I don’t mind this at all. Why? It is relatively clear and holding a big stage, it really sounds like a $100 to $150 IEM and not under $40.00…….and I hold value in that. Note-weight, of course great timbre and a great size and shape. What else are you looking for…..huh?

While the box opening experience is minimal, it is basically what is expected at this price point. Do I like it more than the Zero 1 or Zero 2? Well it is too early to tell, but maybe, maybe it is great? To where the Zero 1 was all midrange and 3D imaging, and Zero 2 added bass while keeping the midrange vocals in check, still here we have more bass!

And when I think there is not a lot of bass (for a HBB collaboration) then comes the breakdown into the drop, and yes, we have both a good example of drum feeling yet there is also a special extra send-off of treble especially in how the treble is itemized into the stage. Really one of the best EDM IEM choices for the money. I’m serious..............as these I love for EDM. Why? First there is still clarity here, that and a bounce to the rhythm section, the high-up instrumentation can be scathing with EDM, as in a club the hi-hat has to perch itself above the bass as it walks across the dance floor. And here that boost in the hi-hats is smooth and totally digestible. Let me put it this way, if you like EDM, just buy these, as you have nothing to lose. But simply remember I have the widest nozzle ear-tips known to mankind here. :)

Thank-you for reading!
First impressions:
Yet at the same time my first impressions stayed true, meaning often there is a slight acclamation period to understanding HBBs take on a sound signature. Normally I simply don’t listen to as much bass emphasis. But this time around the tone was easy to like and easy to understand, same as out of the box, as now. Burn-in helped with fluidness and bass textures, maybe the stage increased a little. But all and all I like this idea and even gave it a better score than the more expensive $199.00 ZiiGaat X HBB Arcadia. Yep, maybe this is just 7Hz doing their magic? Truthfully I don’t know why, but I can guess this one has a better midrange? And that is really how it all comes down, that if you relate with a tuning signature, at times the technicalities can become secondary. It’s not that the 7Hz Elua is perfect, but how it hides its faults ends up making it a far better IEM than you would think it could be for the price. To where I have to ask myself if this playback is boring, and the answer is no, does it have a balance regardless of the bass tune, and it does, then the stage is a thrill, and conforms to the file qualities. That while from a standard phone playback is still fun and acceptable. Then when you factor in the weight, and shape/form factor here………it makes the perfect out and about IEM. And IEM to walk the town with!


$29.99 7Hz Elua

https://www.linsoul.com/products/7hz-x-hbb-elua

$229.00 7Hz Timeless II
https://www.linsoul.com/products/7hz-timeless-ii

$46.00 TRN TA1 Max

https://www.linsoul.com/products/trn-ta1-max


Linsoul website: https://www.linsoul.com/
Linsoul Aliexpress Store: https://ddaudio.aliexpress.com/store/2894006
Linsoul USA Amazon Store link: https://www.amazon.com/s?i=merchant-items&me=A267P2DT104U3C

Disclaimer:
The 7Hz Elua X HBB IEM has had a total of 5 days of burn-in.

Disclaimer:
I want to thank Kaitlyn of Linsoul for the love and the 7Hz Elua X HBB IEM review sample.

Disclaimer:
These are one person's ideas and concepts, your results may vary.

Equipment Used:
Sony WM1A Walkman DAP MrWalkman’s Firmware 3.5mm single ended and 4.4mm balanced
Sony WM1Z Walkman DAP MrWalkman’s Firmware 3.5mm single ended and 4.4mm balanced
Sony TA-ZH1ES DAC/AMP Firmware 1.03 3.5mm single ended and 4,4mm balanced
Electra Glide Audio Reference Glide-Reference Standard "Fatboy" Power Cord
Sony Walkman Cradle BCR-NWH10
AudioQuest Carbon USB
Samsung Phone 3.5mm
HiBy R3 II DAP 4.4mm
7Hz Artemis39 Bluetooth Amplifier and DAC 4.4mm
ifi Go blu Bluetooth Amplifier and DAC 4.4mm
ifi hip dac 3 Amplifier and DAC 4.4mm
Last edited:

ywheng89

100+ Head-Fier
7Hz x HBB Elua's Review - Bombastic Fun!
Pros: Very good bass response(Deep sub bass rumble and punchy mid bass)
Good technicalities for the asking price
Clean mid range
Cons: Slightly offensive uppermids (much better after burn in )
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General/Build/Packaging/Comfort
7Hz released two budget IEMs recently, one is the gaming series G1 and another is the one I have with me today, the Elua, a collaboration with HBB, Elua sterns from hawaiian word and it means two, which also point to the fact that Elua is an IEM with dual DD config. The shell is full transparent with aluminium like faceplate. The nozzle is on the slightly shorter side but not really an issue for me as it fits and seals quite well. If fit is really an issue, using an ear tip with a longer stem will help.
The packaging itself is rather straightforward and minimal, the usual 7Hz’s colorful eartips with various bore sizes, wide and narrow, the IEM itself, as well as the cable. Every 7Hz’s release, I noticed this, doesn’t matter the price point, the included cable is always good quality and good looking and has good synergy with the IEM itself.

Gears used for this review
  • Aune S9C
  • Rog Ally Z1 Extreme
  • 7Hz Elua with stock cable and eartips
  • Fiio JM21
  • Sony ZX300
  • Dita Navigator
Foreword
My review is solely based on what I hear via my equipment and I never consider my reviews to be objective in any way rather a subjective approach. Do take into consideration that everyone’s ear anatomy is not the same, so the psychoacoustics perception might be different as well, but i believe it will not stray too far

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Sound Impression
The Elua’s tuning is leaning towards a slight V shape and it has quite a bit of energy on the top end which I personally think is something different from the usual HBB’s collab. Timbre sounds quite natural to my ears and it has quite a good body to it overall with sufficient note weight to it. Out of the box, the treble is really all over the place, but after I put it through the loop of pink noise for approximately 20+ hours, it got so much better

Bass
  • Bass on the Elua is not lacking by all means, It is punchy has good quality bass with very rumbly sub bass, this will definitely please the bass heads
  • It has good textures and body to it, doesn’t sound loose and thin
  • Mid bass has good slam and punch to it, listening to Metallica’s Lux Aeterna is very pleasing as every hit on the drum be can felt
  • Sub bass is slightly more prominent compared to mid bass and rumbles when the track calls for it, the transition to mid bass is also fairly smooth
  • The speed is also excellent on the NM20, handling complex tracks with ease without sounding muddy and bleeding into the mids
Mids
  • The midrange is good with sufficient note weight, not sounding too thin and vocal positioning is not too forward nor laid back
  • Female vocal has good energy to it and good texture
  • Male vocal that has low baritone voice such as Zhao Peng retains the warmth and texture to it, it doesn’t sound thin at all, very pleasant experience
  • The upper mids are borderline shouty depending on tracks, but i am not that sensitive to it so overall it is very pleasant for me, and it does very well in terms of giving the female vocal a slight boost
  • Slightly recessed in the mids, but not really a deal breaker
Treble
  • Treble response on the Elua is energetic but not harsh nor sibilant
  • Good amount of air and presence and contributed to good sense of staging and imaging as well, resolution is very good for the asking price
  • Detail retrieval is good and i can hear the nuances distinctively without having to try hard, an example of such track is Faye Wang’s 旋木,the finger slides from the guitar can be heard easily
Soundstage/Imaging
  • Soundstage for Elua is good for the price, good sense of width, depth, a little lacking in height but very good overall. It is quite spacious sounding, listening to orchestral or live tracks is very enjoyable
  • Imaging is also a strong point for Elua as well, instruments can be pinpointed easily even on complex tracks such as Slipknot’s People = crap!, well layered and good separation, i even play games with it, enemies sneaking up on you can be heard quite clearly

Driveability
  • The Elua is not hard to drive, any mid range dongle will do just fine
  • It scales quite well with source whereby not so much on the amplification
  • Pairing it with Sony’s ZX300 tilts the overall spectrum to the slightly warmer side with a thicker note weight, whereas on the JM21, it is not as warm but quite dynamic overall
Comparison (QKZ x HBB Hades)
  • Sporting similar configuration, but the Hades is purely on the warm side of the spectrum featuring thumpy bass and thick note weight
  • Bass on the Elua is much cleaner and has better sub bass extension compared to Hades
  • Hades does requires quite a bit of power to sound slight better
  • Treble very smooth and there’s no peak at all
  • Technicalities is below average for the asking price, Elua is leading ahead in terms of technicalities
  • I would say Hades is a rather niche product catering to only a particular genre of music, definitely not an all rounder
Final Thoughts
I have quite a positive experience with the Elua overall other than the slightly rough upper mids. Elua is a solid product overall especially at this price point.
With all things considered, this is not to say that Elua is perfect and without flaws, as i mentioned earlier, if the upper mids can be slightly smoothed out, it will be a really solid product especially at this price point. All in all, the Elua is definitely worth recommending if you are looking for some daily banger and you are willing to do some tip rolling to sort out the upper mids.

*7hz Elua is being sent over for the purpose of this review. I thank Linsoul for the support as always. I am not influenced in any way to produce this review nor do I receive any monetary compensation.

Head over to the following link if you are interested in getting a pair!


7Hz x HBB Elua - Non Affiliated

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briantbrain

New Head-Fier
Dual DD Entry-Level
Pros: Multiple ear tip size options
Energetic midbass with versatile speed
Decent subbass impact
Airy vocals
Controlled treble without offensiveness
Wide soundstage with excellent imaging and micro-detail for its price
Cons: Shell material feels thin
Subbass rumble may be too short for some
Unnatural timbre or unclean sound in high-pitched vocals
Slightly unclean treble on certain tracks
#7Hz #HBB #Elua

Dual DD Entry-Level​

7Hz x HBB Elua​

Another day, another collaboration IEM with HBB (hahaha). After sharing my thoughts on the Deuce and Arcadia, which were impressive for their price, here’s a new entry from 7Hz featuring a 2DD configuration in the entry-level price range. Personally, this IEM might either be a great fit or not your cup of tea. So, I suggest reading my impressions first. Here it is... 7Hz x HBB Elua

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Official Links:​

https://www.facebook.com/7hz8989
https://www.facebook.com/Linsoulaudio

DISCLAIMER​

All impressions are based on testing with my usual setup (listed below). If there are differences in sound impressions, it could be due to our subjective hearing, defective units, or source equipment differences. My impressions are purely subjective and follow the principle: "I only deceive my savings account, but impressions must be honest." Agree? Cool. Disagree? That’s fine. My impressions are just for fun and because I enjoy doing this—not out of necessity.
Important!! These are not reviews because I only use my ears.
Important!! I still recommend you audition this yourself. Who knows? Maybe it’s my ears that need a visit to the ENT doctor—or yours! (haha)


MY DAILY DRIVER​

  • IEMs: Nostalgia Audio Camelot, Symphonium Crimson, 634ears Loak2 TX03, Fatfreq Maestro Mini, 7Hz Timeless
  • DACs: Fiio Q15, Chord Mojo 2, XDuoo XD05 Pro
  • DAPs: HibyDigital M300
  • Cables: Effect Audio 24c, Verus Lavender 6, VJC Heirs & Black Heirs, Kinera Mia
  • Ear Tips: Eletech Baroque, Penon Liquor, JVC Spiral Dot++, Azla Sedna Max ASMR, Kiwi Ears Flex, Spinfit W1 Premium, 7Hz Barrel

Unboxing​

For an entry-level IEM priced under IDR 500k (~$35), the unboxing experience is quite standard. However, the included accessories are adequate:
  • The IEM itself
  • 2-braid 2-pin cable with a 3.5mm jack (thin and small; functional but not my style)
  • 6 pairs of ear tips (3 wide bore and 3 narrow bore)
  • Documentation
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Fitting​

Considering its 2DD configuration, the IEM is relatively slim. The plastic shell, while lightweight, feels a bit fragile due to its thinness. Its transparent design exposes the dual dynamic drivers inside. The faceplate is slightly wide, and the nozzle has average length and diameter. For me, the fit is fine, but users with smaller ear canals might need to find suitable ear tips for proper sealing.

Sound Impression​

Base testing: HibyDigital M300 with stock cable and ear tips, occasionally paired with XDuoo XD05 Pro.
Bass:
As expected, this HBB collaboration IEM focuses more on midbass than subbass. The midbass is punchy, fast, and slightly above average in thickness and impact (not quite at basshead levels). For someone like me who doesn’t tolerate overly aggressive midbass, it’s perfectly balanced and fun across various tracks. Subbass, on the other hand, has good body but lacks immersive rumble, which feels short-lived. Still, for an entry-level IEM, I can’t complain about the low frequencies.
Mid:
The IEM delivers weighty male and female vocals effectively, paired with airy characteristics that feel natural and balanced. However, vocals with higher notes can sound unnatural—either too thin, plasticky in timbre, or unclear. If you enjoy JPop or tracks with dominant female vocals, this might not be ideal. The vocal positioning is centered but slightly recessed.
Treble:
As a treble lover, I appreciate the controlled presentation here. Cymbals and piano notes are handled well without feeling offensive, though I personally prefer a slight mid-treble spike for extra sparkle. Treble extension is sufficient to reveal the IEM’s impressive micro-detail for its price. However, the treble occasionally exhibits unclear timbre, giving an unnatural or plasticky feel in certain tracks.
Clarity:
From the upper midrange to the treble, there’s noticeable unclean sound. While micro-detail retrieval is excellent, the unclear timbre can be distracting, especially with plasticky-sounding instruments or dry vocals.
Soundstage:
Above average. The wide stage and airy sound provide an open and spacious listening experience.
Imaging:
3D imaging is excellent for the price range. Instrument separation is clear and precise, making it easy to pinpoint sounds. For an entry-level IEM, there’s little room for complaints here.

Source Selection​

The first thing I noticed was the need for higher volume on my DAP to match other IEMs’ sound output. Hence, you’ll need a source with sufficient power to optimize this IEM. Tonally, I’d pair it with analytical or warm sources. However, be cautious with overly bright sources, as they might emphasize the clarity issues.

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Ear Tips Selection​

To address the clarity and thin vocals, especially on female tracks, I recommend using ear tips like Azla Sedna Max ASMR or Kiwi Ears Flex for vocal enhancement. Alternatively, Dunu S&S can tame treble harshness while boosting low frequencies.

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Conclusion​

  • Another collaboration IEM from HBB with punchy and energetic midbass that could easily become a favorite for many listeners.
  • Controlled treble, airy vocals, impressive micro-detail, and a wide soundstage are key selling points for this entry-level IEM.
  • Unfortunately, the unclear sound in the upper mids to mid-treble and unnatural timbre in high-pitched vocals may deter those who prioritize clarity.
  • Is this IEM worth buying? If you mostly listen to tracks without dominant female vocals in high registers or if you love EDM with fun low frequencies and detailed treble, this IEM is an excellent daily driver.
That’s all for now.
Trust your own ears—if you still use them.
Bye!

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suicideup

New Head-Fier
7Hz X HBB Elua Review!
Pros: A somewhat “pseudo-Legato” 30 USD cousin!

V-shaped, bassy sound signature!

Elevated, subbass-dominant bass response!

Decent, well-placed mids!

Clear, sparkly vocals!

Energetic,decent treble extension!

Above-average technicalities for its price.

Excellent fit, comfort, and isolation!

Very good amount of eartips for its price.
Cons: Upper mids and treble may come across as “tinny” or “peaky” to some ears.

A pouch or a case would’ve been a good treat.

Will need at least 2vrms of power to sound the best.
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7Hz X HBB Elua Review!

Video review here

Good day! After 5 days of casual and critical listening, here’s my written review for 7Hz X HBB Elua. Double edged!

Disclaimer:

  • I don’t read FR graphs. I only use my ears, as earphones should be used.
  • Linsoul 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.
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 red eartips, any form of EQ or MSEB off, 40-60% volume.

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Sound signature:
  • As expected from a HBB collab, the 7Hz X HBB Elua is a v-shaped, basshead IEM.
Lows:
  • Bassheads on a budget will enjoy the Elua, as the overall character of this region is one of the IEMs with well-tuned bass under 30 USD. It is a sub bass dominant IEM, so do expect things to get rumbly, but to a certain extent, as this region never came across as sloppy to my ears. Sure, it is thick and elevated, but never came across as slow. In fact, it may come across as slightly fast at times, while keeping the amount non-lacking. It still exhibits an adequate bass quantity for an IEM under 50USD. If I were to nitpick, I would’ve liked a bit more midbass presence to add a bit more punch to the overall character, but that’s just me.
Mids:
  • The mids are slightly recessed if we set aside how its bass presents itself, and may come across as “thin” to some people. Lower mids aren’t as thick as what I expected, exhibiting a good amount of detail and presence for its price. Upper mids are definitely elevated, clear, and airy, along with the treble, but not as much as the bass. The Elua sounded a bit thin and peaky to what I prefer. Don’t get me wrong, this isn’t a deal breaker if and if you are only not sensitive to boosted or bright upper frequencies, but if you’re the latter, you may want to look for something else.
Treble:
  • As for the treble, it is bright, well-extended, and sometimes sounded a bit “splashy” to my liking. This means again, that if you are sensitive to extra upper frequencies, you may want to look elsewhere for something else. Detail retrieval is above average for its asking price and rendered nuances and overall details with ease, but not up to the point that I’d recommend this IEM for analytical listening sessions.
Soundstage, Imaging and Separation:
  • The Elua exhibits an above average technical performance for its price to my ears. I am not surprised, but in a good way, about this finding, since most IEMs that are configured with LCP drivers that I have personally experienced and reviewed, share the same character, which means that for this price, this should not have any critical negatives in this department. The soundstage is wider than deep, with a good amount of height. Separation and layering is neatly presented for the most part, with minor instances of congestion on certain, heavy tracks. Imaging is precise and does not have problems when used with live performances and games.
========================================================================
Other IEM Comparisons!

Twistura D-Minor (Stock filter)

  • The Twistura D-Minor is a more balanced, mature, and thicker sounding IEM. Its overall sound will be perceived as “muted” when compared to the Elua. In return, this does not also exhibit any fatigue or discomfort. Technical performance is a bit better on the Elua, but not by a lot.
EPZ Q1 Pro
  • The EPZ Q1 Pro is a Harman-sounding IEM and is a bit more “balanced” when compared to the Elua, due to its much more forward mids response. It is also a bit smoother in sound as well, and exhibits less peaks when compared. Technical performance is more or less the same between the two sets.
Simgot EW200
  • The Simgot EW200 is a brighter, leaner, wider sounding IEM when compared to the Elua. Its overall sound is more vivid as well, but is much prone to fatigue. Technical performance is also better on the EW200 when compared.
========================================================================
Pros:
  • A somewhat “pseudo-Legato” 30 USD cousin!
  • V-shaped, bassy sound signature!
  • Elevated, subbass-dominant bass response!
  • Decent, well-placed mids!
  • Clear, sparkly vocals!
  • Energetic,decent treble extension!
  • Above-average technicalities for its price.
  • Excellent fit, comfort, and isolation!
  • Very good amount of eartips for its price.
Cons:
  • Upper mids and treble may come across as “tinny” or “peaky” to some ears.
  • A pouch or a case would’ve been a good treat.
  • Will need at least 2vrms of power to sound the best.

========================================================================
Verdict
Whenever I review IEMs, there are instances that I am asked for a “true” budget alternative for the 7Hz Legato, which aren’t a lot, until today as the 7Hz’s X HBB Elua’s existence answers the question. The overall sound of this IEM is a watered-down version of the Legato, in my humble opinion, but with slight tweaks, such as a more present treble character. This quality can be a good or a bad thing, depending on one’s ears and hearing perception. Overall, I personally recommend the 7Hz X HBB Elua as a basshead IEM for those bassheads that do not have any problems with extra treble presence. Bassheads on a budget will be happy with this one, 7Hz!

========================================================================
Pairing recommendations:
  • Source: The 7Hz X HBB Elua needs at least 2VRMs dongle to shine the most. A warmer source is preferred.
  • Eartips: The eartips included pairs well with this IEM, but you may still use your preferred eartips.
  • Cable: The cable is basic and gets the job done. You may still use your preferred cable.
Thank you for reading!

Non-affiliated link here:
https://www.linsoul.com/products/7hz-x-hbb-elua

Additional Photos Here:

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IceIceberg

100+ Head-Fier
7Hz x HBB Elua: mini Legato
Pros: Budget price - 30$
Good price/performance
Attractive design, comfortable fit
Quality eartips
2DD dynamic structure
Basshead IEMs
Powerful bass, decent mids, clean treble
Cons: Narrow stage, layering
The cable could be better

Review of 7Hz x HBB Elua:
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7Hz x HBB Elua – is a budget-friendly new product from 7Hertz in collaboration with Hawaii Bad Boy. 7Hertz has teamed up with the well-known YouTube reviewer "Hawaii Bad Boy" (HBB), famous for his love of rich, impactful bass and creating basshead IEMs. The Elua IEMs were introduced in early November and quickly hit the market.
7Hertz, a globally recognized Chi-Fi company, specializes in developing affordable IEMs with versatile sound signatures that appeal to a wide audience.
Let’s dive into the details of this new release. The 7Hz Elua were developed with Hawaii Bad Boy, who played an active role in tuning their sound. Reflecting on HBB’s previous collaborations, all IEMs designed with his involvement were focused on delivering powerful and energetic bass. Hopefully, this model will follow suit.
The Elua features an eye-catching design made from transparent resin and houses two dynamic drivers: a 10mm and an 8mm. I suspect that one driver is dedicated to bass response, while the other handles the mids and highs providing a balanced sound.
In conclusion, the 7Hz x HBB Elua is an intriguing option with its unique driver configuration, which I haven’t encountered before. Priced at just $30, this model might become the new budget king for basshead IEMs. But is it truly as good as it seems? That’s what we’ll find out in this review.



I would like to thank Linsoul audio store and especially Kaitlyn for providing the opportunity to test and review this product.
Disclaimer: My review is my personal, honest opinion about the product. I don't receive any income for conducting reviews and I don't participate in any affiliate programs.
You can purchase the 7HZ G1 from:



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  • 2DD Driver Configuration;
  • Impedance: 18Ω;
  • Sensitivity: 107dB;
  • Frequency response range: 10Hz-20kHz;
  • Connector: 2 pin 0.78mm.;
  • Cable material: Custom 4-core detachable cable;
  • Price:30$.
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  • IEM itself;
  • Custom 4-core detachable cable, 1.2m length;
  • 2 sets, 6 pairs of regular eartips: 3 pairs Standard bore eartips (S / M / L), 3 pairs narrow bore eartips (S / M / L);
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The 7Hz Elua comes in a compact white box. The front side has the IEM model name alongside an illustration of the shells, while the back provides specifications and an information panel.
Upon removing the top cover, I was greeted by the IEM shells displayed on a panel that follows the front box design. Under this panel, you’ll find the cable, colorful eartips, and a small instruction manual.
Overall, the packaging is budget, but the included accessories are sufficient for comfortable use of the IEMs.

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The shells of the 7Hz Elua are made from resin using 3D printing technology. The resin is fully transparent, allowing you to easily see the two dynamic drivers placed inside.
The design of the shells is simple and functional. The faceplate features a silver metal panel with a woodgrain-like texture, along with the 7Hz logo and the IEM model name. On the back side, you’ll find a relatively long and wide nozzle with a metal mesh inside and ridges to secure the eartips.
A notable advantage of this model is the absence of damping foam behind the mesh, which can often distort the sound and reduce its accuracy. Above the nozzle, there’s a small compensation vent and R/L indicators.
The 2-pin 0.78mm connector is located on the side of the shell.
I have not had any issues with the build quality. All the parts are carefully made and I have not had any complaints about the build.

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The 7Hz Elua shells are small and lightweight, weighing about 5 grams each. Thanks to their compact size, streamlined oval shape, and upward-angled nozzle, these IEMs provide exceptional comfort. Even during extended listening sessions, they cause no discomfort or pressure.
I have small ears, and I can confidently say that the Elua fits perfectly and feels almost weightless during use. If you have small ears or narrow ear canals, I highly recommend these IEMs.
As for sound isolation, it is average, blocking around 50–60% of external noise due to the somewhat loose fit. However, experimenting with different eartips or using foam tips could improve isolation, helping to minimize ambient noise further.

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The included cable is of very basic quality. It consists of two 4-core strands made of oxygen-free copper in a silver-colored PVC coating to prevent damage. The cable is soft, lightweight, and thin, but lacks a memory effect and isn’t particularly flexible.
One end of the cable features an angled 3.5mm plug in a transparent housing. In the middle, there’s a round splitter with the 7Hz logo and the IEM model name. The other end has aggressively shaped ear hooks, a 2-pin 0.78mm connector, and R/L indicators.
Overall, it’s a standard cable for budget IEMs. However, I would recommend replacing it to improve comfort and functionality.

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I was pleasantly surprised by the included eartips. They are made of high-quality rubber, which is flexible and soft, providing a snug fit that adheres well to the ears.
The eartips themselves are colored and come in two categories: those with a standard bore and those with a narrow bore.
Narrow-bore eartips emphasize the low-frequency range, pushing the mids and highs to the background.
Standard-bore eartips offer a balanced sound signature without highlighting any particular frequency range.
For my listening sessions, I used the pink eartips with the standard bore, as I find bass enhancement through eartips to be excessive.

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There are no surprises when it comes to sources compatibility. I tested these IEMs with a variety of sources, and they performed similarly across the board, whether connected to an Android phone or a desktop DAC.
For my part, I used these IEMs with a bluetooth DAC Qudelix 5k


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The 7Hz x HBB Elua offers a balanced V-shaped sound signature with distinctive features that are characteristic of HBB's tuning style.


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Well, as far as I understand, it's the 10mm dynamic driver that's responsible for the lower frequencyis, and they've paid the most attention to it in order to bring the bass to perfection.
Sub-bass: Powerful, rumbling, achieved through the bass rumble. The sub-bass here feels like a push, energizing the main attack with extra energy and adding weight to the body of the bass. It is quite fast, but perceptible even with minor attacks.
Mid-bass: As 7Hz claims, they have raised the low region by 10 dB and it is felt in listening. The bass here is energetic, deep, punchy, and dense. It is especially noticeable in atmospheric genres like EDM, Ambient, House, HipHop. The attacks are deep and long, and the fading is slow and smooth. At the same time, the bass here does not overlap the sound of other instruments and vocals, without creating a swamp effect. I believe that the quantity and quality of bass here deserves to be called basshead IEMs. The timbre of the bass guitar is energetic, the drums are deep and delineated, and the sound of the midi controller and drum machine is rumbling and bassy.
I would say this is an ideal bass response for IEMs in the under-$30 price range. Overall, I’d describe the Elua as a mini-Legato, offering similar performance to IEMs that cost three times as much.

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Lower mids: The lower mids are deep, melodic, and energetic. They mirror the performance of the bass region, offering a similar level of richness and depth. Guitar strings sound melodic and full of energy, while saxophones and clarinets in jazz genres come across as lively, perfectly complementing and enhancing the overall jazz sound.
Mids: 7Hz described this region as flat, and I agree with that assessment. As I understand it, the mids are handled by the 8mm dynamic driver positioned slightly above the main 10mm driver.
Instrumental performance is decent overall. The guitar has a velvety tone, the piano is melodic, but the violin exhibits a slight graininess, which I found disappointing. Male vocals are unremarkable and failed to impress me. They lack tonal depth and feel flat and lifeless. However, for casual listeners who don’t focus on tonal nuances in vocals, this should not be a problem.
Female vocals, on the other hand, were more enjoyable. While they are slightly cold and flat, they blend well with the overall sound. The tone is velvety, occasionally bright, but lacks tonal variety. Despite this, they feel more engaging than the male vocals.
Considering these IEMs were designed with an emphasis on powerful and rich bass, the mids are respectable within this context.
Upper mids: The upper mids are sparkling and bright but tend to exhibit some graininess. This region highlights the sound of instruments and vocals effectively, though the decay is somewhat rough rather than smooth. I wouldn’t call this region overly emphasized or underwhelming—it strikes a reasonable balance.
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The treble is bright, clean, and sparkling, though it does exhibit some graininess.
Instruments: I enjoyed the crisp sound of cymbals, though their decay is slightly grainy. The upper notes of the piano also impressed me with their clarity. Violins have a velvety and sparkling tone without being overly bright or harsh, making them easy on the ears.
Vocals:Both male and female vocals in the upper registers are enjoyable, but I often notice sibilance or graininess during the decay, which detracts from the experience.
Overall, the treble range is respectable. It is not overly bright and maintains a level of clarity that should appeal to most listeners.

Separating, sound stage


I noticed that IEMs with balanced armature drivers tend to have a narrow and confined soundstage, and the Rose Technics Star City 5 Pro is no exception. I would describe them as more monitor-like rather than analytical. With these, you won’t be piecing sounds together like a LEGO puzzle.
In terms of separation, the sounds don’t stack on top of each other but are delivered very smoothly and balanced, one after the other. I have no complaints about the imaging—you can easily pinpoint the direction of instruments or vocals.
Gaming impression

When it comes to gaming, I wouldn’t consider these IEMs the best choice. Due to the narrow soundstage, it can be challenging to accurately determine the distance and direction of sounds like gunshots or footsteps. Additionally, the slightly dominant bass regions can create a "boomy" effect during intense action scenes, which might feel distracting and irritating during heated battles.
However, for single-player games, these IEMs excel. They provide an immersive experience, allowing you to fully dive into the game world and enjoy the atmosphere to the fullest.
For FPS games or shooters, I would recommend their sibling, the 7Hz G1, which I consider the perfect IEMs for this category.

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7Hz x HBB Elua vs. 7Hz G1:


The 7Hz G1 and Elua share a similar build shape and quality, but the G1 is made from metal, which gives it a more premium feel. The G1 has a better stock cable, but the Elua comes with superior ear tips. The G1 is priced $5 higher than the Elua.
Sound Comparison:
The 7Hz G1 offers a warm, analytical sound signature that reminds me of the Simgot EA500LM, whereas the 7Hz Elua is a true basshead IEM.
Bass: The bass on the Elua is tighter, more powerful, and of higher quality.
Mids and Treble: I preferred the mids and Treble on the G1, as they are more detailed and refined.
Soundstage and Imaging: The G1 is the clear winner in terms of soundstage and separation, making it particularly well-suited for gaming.
The G1 is designed as a gaming-oriented IEM and excels in that role, offering an analytical and mature sound that feels above its price point. On the other hand, the Elua is perfect for bass enthusiasts seeking an engaging and fun listening experience.
These two models cater to different audiences: the G1 is ideal for analytical listening and gaming, while the Elua stands out as an excellent basshead IEM.

7Hz x HBB Elua vs. QKZ x HBB


Both models are made from resin, but the Elua features an additional driver and offers slightly better comfort due to its compact shape. In terms of packaging, both models are quite similar. However, the Elua is priced at twice the cost of the QKZ x HBB.
Sound Comparison:
Both are basshead IEMs designed with HBB's tuning. Here's how they differ:
Bass: The Elua delivers higher-quality bass, while the QKZ has a greater quantity of bass.
Mids: The mids on the Elua are more accurate and realistic.
Treble: The treble on the Elua are transparent and clean, while the QKZ highs are more recessed and muffled.
Soundstage and Imaging: The QKZ offers a wider soundstage, as well as better separation and imaging.
In conclusion:
If you’re after sheer bass quantity and a spacious soundstage, the QKZ x HBB is your pick. However, if you want quality bass and superior performance in other aspects, the 7Hz x HBB Elua is the better choice.
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A lot has been said already, but I’d like to wrap up by saying that the 7Hz x HBB Elua are a well-tuned, mature basshead IEM. To reiterate, these little gems pack what feels like a subwoofer inside, making them the younger sibling of the 7Hz Legato, which costs three times as much.

These IEMs are perfect for listening to EDM, House, Electro, Trance, Drum & Bass, and Hip-Hop. They deliver tight, powerful bass, respectable mids, and clean highs—all for just $30. A solid choice and a successful collaboration with HBB.

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Sonic Sleuth

500+ Head-Fier
7Hz x HBB Elua review: A Collaboration with a Transparent Soul
Pros: Warm and engaging overall sound signature
Punchy and impactful mid-bass with good texture
Clear and detailed midrange with natural timbre
Well-extended lower treble with good detail retrieval
Spacious soundstage with above-average width
Handles sibilance well, resulting in a non-fatiguing listen
Surprisingly good detail retrieval for the price
Excellent instrument separation and layering in complex tracks
Cons: Sub-bass lacks rumble and has a slightly slower decay
Upper treble roll-off limits air and sparkle
Soundstage depth and height could be more pronounced
Plastic build might feel flimsy to some
Visible seams on the shell detract from the aesthetic
Included cable could be more durable and tangle-resistant
Preface:

You can purchase Elua at the following link (not an affiliate link):
https://www.linsoul.com/products/7hz-x-hbb-elua?_pos=1&_psq=elua&_ss=e&_v=1.0

Also, I’m not a seasoned reviewer, 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.

Disclaimer: This is a review unit from Linsoul however I retain full editorial control and the opinions expressed here are solely my own. I have not been paid or compensated by Linsoul, 7Hz or any other entity for this review. My assessment is based solely on my personal experience with the product.

I do get to keep the unit after review but that had no influence over the opinions expressed below.

Linsoul Store links (None of them are affiliate links):

Linsoul website: https://www.linsoul.com/
Linsoul Aliexpress Store: https://ddaudio.aliexpress.com/store/2894006
Linsoul USA Amazon Store link: https://www.amazon.com/s?me=A267P2DT104U3C&marketplaceID=ATVPDKIKX0DER

Sources used:
  • Google Pixel (Gen 2) Type C to 3.5mm dongle
  • iBasso D16 Taipan
  • iBasso DC Elite
  • Quloos QA390
  • Chord Hugo 2 + 2go
  • Onix Overture XM5
Introduction:

7Hz, is already a known name in the audiophile world, hails from China. They've quickly gained a reputation for producing IEMs that offer exceptional value for money, often punching well above their weight class. Personally, I've been thoroughly impressed with their previous releases, especially the Zero, Zero 2, and Timeless – each offering a unique flavor of sonic excellence.

Now, 7Hz is back with the Elua after the G1, a dual dynamic driver IEM in collaboration with HBB that promises to deliver a captivating listening experience at an incredibly accessible price point.

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Box Contents:
  • IEMs
  • 0.78mm 2-pin Cable (3.5mm terminated)
  • 05 pairs of silicone tips
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Specifications:

Impedance : 18Ω
Sound Pressure Level : 107 dB/V @ 1 kHz
Frequency Range : 10-20,000Hz
THD (Total Harmonic Distortion) : < 0.5% @ 1kHz
Driver Type : Dual Dynamic Driver

Unboxing Experience:

The Elua's packaging reflects its budget-friendly philosophy: functional and straightforward. It's a compact box that houses the essentials without any unnecessary extravagance. Inside, you'll find the IEMs themselves, nestled securely, along with a selection of ear tips and a detachable cable. What you will not find is a carrying pouch unlike their G1 which I would've appreciated more. It's a minimalist presentation that prioritizes substance over style, reminding us that it's the sound that truly matters, not the box it comes in.

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Design and Build:​

The Elua IEMs sport a sleek, transparent design that allows you to glimpse the inner workings. The clear plastic shell showcases the dual dynamic drivers and their intricate wiring, adding a touch of visual intrigue. The faceplates feature a contrasting textured design, with the 7Hz logo and Elua name subtly etched in.

While the overall design is visually appealing, there are a couple of points worth noting. Firstly, the seams where the transparent shell meets the faceplates are visible, potentially detracting from the otherwise clean aesthetic. Secondly, the plastic used for the shells, while durable, feel a bit flimsy

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The detachable cable is made of a flexible, tangle-resistant material, and it terminates in a 3.5mm jack. While the cable is functional, it could be slightly upgraded for improved durability and tangle resistance. It feels a bit thin and might leave you wanting a bit more in terms of suppleness and tangle resistance.

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Wearing Comfort:


The Elua lives up to its name, which translates to "light" in Hawaiian. These IEMs are incredibly lightweight and comfortable to wear, even for extended periods. The ergonomic design ensures a secure fit, and the variety of included ear tips allows for a personalized seal. This combination of factors makes the Elua ideal for long listening sessions or for use on the go, as they stay comfortably in place even during active movement.

Driveability:

The Elua's low impedance and high sensitivity make it incredibly easy to drive. Whether you're using a smartphone, a laptop, a dongle or a dedicated DAP, you won't need an incredibly powerful amplifier to unlock its full potential. I did not observe any major difference in SQ going from a dongle to a powerful desktop amp.

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Sound Analysis:


Tonality:

The Elua extends a warm, inviting sonic hug. This warmth, primarily centered around the mid-bass, imbues the music with a full-bodied and satisfying character, akin to wrapping yourself in a cozy sonic blanket. Thankfully, it stops short of becoming excessively bloated or muddy, thanks to a well-controlled bass response and a relatively smooth treble presentation, ensuring a non-fatiguing listen even during marathon listening sessions. This warmth is immediately apparent in tracks like Gregory Porter's "Liquid Spirit," where his velvety baritone vocals are rendered with a rich and inviting tone.

Sub-Bass:

  • Depth: The Elua plunges deeper than its budget-friendly price might suggest. While it might not reach the subterranean depths of dedicated basshead IEMs that people have come to expect from HBB's collabs, it provides a solid foundation for bass-heavy tracks, like a sturdy bedrock upon which the sonic landscape is built. This is evident in Lorde's "Royals," where the deep bass notes underpinning the track are reproduced with surprising authority, adding weight and gravitas to the song's minimalist production.
  • Rumble: Rumble is present, but it's more of a gentle hum than a full-bodied earthquake. This suggests that the Elua prioritizes depth over sheer visceral impact. For instance, in Hans Zimmer's "Why So Serious?" from The Dark Knight soundtrack, the deep bass notes that underpin the track's tension are present but lack the bone-rattling intensity that a bass head IEM might deliver.
  • Decay: Sub-bass decay leans towards the leisurely side, contributing to the Elua's overall warmth. This relaxed decay can add a pleasing fullness, but it might blur the lines in faster, more complex passages, like a lingering echo in a cavernous hall. This is noticeable in Massive Attack's "Teardrop," where the slow decay of the sub-bass adds to the track's melancholic atmosphere. However, in a fast-paced electronic track like Noisia's "Machine Gun," the slower decay can make the bass lines sound slightly less defined.
Mid-Bass:

  • Impact: This is where the Elua truly flexes its muscles. The mid-bass delivers a satisfying punch and impact, injecting the music with an infectious energy that makes it impossible to sit still. This is readily apparent in Daft Punk's "Around the World," where the driving bass line hits with a tight, impactful thump that compels you to tap your feet and nod your head.
  • Texture: Mid-bass texture is well-defined, allowing you to discern the nuances of different bass instruments and electronic sounds, like a skilled sculptor revealing the intricate details of their creation. This is beautifully showcased in Marcus Miller's "Run for Cover," where the intricate bass lines are rendered with clarity and precision.
  • Decay: Mid-bass decay is slightly faster than the sub-bass, striking a good balance between impact and clarity. It's like a drumbeat that resonates with authority but doesn't overstay its welcome. This is evident in Red Hot Chili Peppers' "Can't Stop," where Flea's energetic bass lines are rendered with a satisfying punch and a clean decay.
Lower Midrange:

  • Presence: The lower midrange has a warm, inviting presence that adds body and richness to vocals and instruments, like a comforting fire on a cold winter's night. This is particularly noticeable in Leonard Cohen's "Hallelujah," where his deep baritone vocals are imbued with a sense of intimacy and warmth.
  • Warmth: The warmth in the lower midrange contributes to the Elua's overall musicality, making it a joy to listen to for hours on end. It's like a favorite sweater that you never want to take off. This warmth adds a touch of nostalgia and romance to the trumpet's tone in Chet Baker's "My Funny Valentine."
Upper Midrange:

  • Clarity: The upper midrange is clear and articulate, allowing vocals and instruments to shine through with detail and precision, like a perfectly polished lens bringing the music into sharp focus. This is evident in Joni Mitchell's "Both Sides Now," where her vocals are presented with exceptional clarity, allowing you to appreciate the nuances of her phrasing and emotion.
  • Detail: The Elua reveals a good amount of detail in the upper midrange, allowing you to hear the subtle textures of instruments and the intricacies of vocal performances, like a magnifying glass revealing hidden treasures in a familiar landscape. This is exemplified in Dire Straits' "Money for Nothing," where Mark Knopfler's intricate guitar work is rendered with clarity and detail.
Lower Treble:

  • Detail: The lower treble is well-extended and detailed, adding sparkle and air to the sound without becoming harsh or fatiguing. This is like a subtle shimmer on a still lake, adding a touch of magic to the music. This is beautifully illustrated in Radiohead's "Paranoid Android," where the shimmering cymbal crashes and intricate guitar lines are rendered with clarity and precision.
  • Presence: The treble presence is well-balanced, adding a sense of openness and airiness to the soundstage without becoming overly forward or sibilant. It's like a gentle breeze carrying the music through the air. This is evident in Norah Jones' "Don't Know Why," where the delicate piano notes are rendered with a gentle touch, adding a sense of intimacy and warmth to the track.
  • Decay: Treble decay is natural and smooth, contributing to the Elua's overall non-fatiguing sound. It's like a fading echo that gently disappears into the distance. This natural decay is showcased in Dave Brubeck's "Take Five," where the vibraphone notes ring out with a pleasing resonance.
Upper Treble:

  • Extension: The upper treble extends reasonably well, providing a sense of air and sparkle to the music. However, there's a slight roll-off, preventing it from achieving the ultimate level of detail and brilliance. This is like a star that shines brightly but is slightly obscured by a thin veil of clouds. This is noticeable in Beethoven's Symphony No. 5, where the high-pitched strings and piccolo flourishes are present but lack the ultimate sparkle and air that a more resolving IEM might provide.
  • Sparkle: While not the most prominent characteristic, the Elua does offer a subtle sparkle in the upper treble that adds a touch of brilliance to the music, like a sprinkle of fairy dust on a moonlit meadow. This subtle shimmer is evident in Queen's "Bohemian Rhapsody," where the high notes in Freddie Mercury's vocal runs have a subtle shimmer that adds to the track's dramatic flair.
  • Sibilance: The Elua handles sibilance with grace, avoiding any harshness that can be fatiguing over time. This is like a smooth, flowing stream that avoids any jarring rocks or rapids. This is exemplified in Sarah McLachlan's "Angel," where her vocals are smooth and free of sibilance, even in the higher registers.

Soundstage:

The Elua paints its sonic images on a canvas that's surprisingly wide for its price point. It extends beyond the confines of your head, creating a sense of spaciousness that's particularly noticeable in well-recorded orchestral pieces like Holst's "The Planets," where the expansive orchestration breathes and unfolds with a pleasing sense of width, allowing the different sections of the orchestra to occupy their own distinct spaces. Depth is also respectable, though not as pronounced as the width. Instruments are layered with a discernible sense of front-to-back positioning, as heard in Pink Floyd's "Wish You Were Here," where the layered vocals and instruments have a sense of depth, drawing you into the song's melancholic atmosphere. Height is perhaps the least emphasized dimension, not feeling claustrophobic but not creating a towering sense of verticality either. This is noticeable in tracks like Arcade Fire's "Wake Up," where the soaring vocals and instrumentation have a sense of upward reach, but the height is somewhat limited compared to IEMs with a more pronounced vertical soundstage.

Overall, the Elua's soundstage creates a good sense of immersion, especially for its price point. It's not the most expansive or holographic presentation, but it's spacious enough to draw you into the music. This is particularly evident in Sigur Rós's "Hoppípolla," where the ethereal soundscapes are presented with a sense of space and atmosphere that envelops the listener, transporting them to another world.

Layering and Separation:

Even amidst a chaotic symphony of sounds, the Elua maintains admirable composure, deftly separating individual instruments and vocals. Instruments don't blend together into an indistinct mass; instead, they retain their individual character and position within the soundscape, like stars shining brightly against the backdrop of the night sky. This is particularly impressive in complex tracks like Dream Theater's "The Dance of Eternity," where the intricate instrumental interplay is handled with impressive clarity, allowing you to follow the individual lines even during the most frenetic passages.

Layering is also well-executed, with instruments occupying distinct planes, creating a sense of three-dimensionality, like a meticulously arranged still life painting. This is beautifully showcased in Queen's "Bohemian Rhapsody," where the layered vocals and harmonies are presented with distinct clarity, allowing you to appreciate the intricate vocal arrangements. Instrument placement is generally accurate, with instruments and vocals positioned logically within the soundstage, contributing to a cohesive and realistic presentation. This is evident in Miles Davis's "So What," where the interplay between the trumpet, saxophone, and piano is rendered with precise placement, creating a sense of natural interaction between the musicians.

Timbre:

The Elua's timbre is generally natural and realistic, with instruments and vocals sounding true to their intended character. There's no significant coloration or artificiality that detracts from the authenticity of the sound, like a clear window that allows you to see the world as it truly is. This is particularly evident in Yo-Yo Ma's performance of Bach's Cello Suite No. 1, where the cello's rich and resonant tone is reproduced with fidelity, capturing the instrument's natural timbre.

While the Elua doesn't quite reach the level of realism achieved by top-tier IEMs, it does a good job of conveying the essence of instruments and vocals. You can discern the subtle nuances of different instruments and the unique characteristics of individual voices, like a skilled impressionist capturing the essence of their subject with a few deft strokes. This is beautifully illustrated in Eva Cassidy's rendition of "Over the Rainbow," where her voice is imbued with a sense of emotion and realism that draws you into the performance.

Detail Retrieval:

The Elua is surprisingly adept at retrieving micro-details in the music. Subtle nuances in recordings, such as the texture of a bow on a violin string or the breath intake of a vocalist, are often audible, like a detective uncovering hidden clues at a crime scene. This is evident in Steely Dan's "Aja," where the intricate percussion work and subtle background vocals are revealed with impressive clarity.

The Elua also captures the nuances of musical performances, conveying the emotion and intent behind the music. You can hear the subtle variations in a singer's vibrato or the delicate touch of a pianist's fingers on the keys, like an empathetic friend understanding the unspoken language of the heart. This is beautifully showcased in Nina Simone's "Feeling Good," where the raw emotion in her voice and the subtle inflections in her phrasing are captured with remarkable detail.

Conclusion:

The 7Hz x HBB Elua IEMs offer a compelling combination of sound quality, comfort, and value. They deliver a pleasingly warm sound signature with a focus on mid-bass punch and overall clarity. While not perfect, the Elua's strengths make it a strong contender in the budget IEM market.

The Elua's ability to resolve detail and handle complex musical passages is commendable, especially given its price. Its spacious soundstage adds a welcome sense of immersion, drawing the listener into the music. Furthermore, its comfortable fit and easy driveability make it a versatile option for various listening scenarios.

While the sub-bass extension could be deeper and the upper treble more extended, these are reasonable trade-offs considering the Elua's affordability. The build quality, while generally decent, could benefit from some refinements in terms of seam visibility and cable durability.

Overall, the 7Hz x HBB Elua is a solid choice for those seeking a well-rounded and enjoyable listening experience without breaking the bank.
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Robin Kyle Datiles

New Head-Fier
7Hz x HBB Elua: Another budget contender for bass-heads
Pros: - Well executed V-shape tuning
- Amazing bass note weight
- Mid-range retains a good level of clarity
- Treble sounds lively and energetic
- Dynamic
- Comfortable
- Price
Cons: - Imaging and soundstage is pretty average
- Inclusions and cable quality (Maybe I'm being too picky)
DISCLAIMER
The review I'm about to share reflects my personal experience and provides an honest evaluation regarding this set. I am completely unaffiliated from the brands I review. I did not receive (or will receive) any financial or monetary incentives in exchange for writing this review, I wrote this review of my own free will and all of the opinions you'll read are my own.

This unit was provided by Linsoul Audio for free in exchange for an honest and detailed review. Rest assured, this does not affect my opinions about this set. Thank you, Linsoul, for the continuous support!

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INTRODUCTION
It has been a long time since I’ve listened to something truly fun in this price range. The sub-$40 category is filled with IEMs tuned to follow the Harman target, tuned very safely, or neutral-tuned to highlight details. Not that this is bad—after all, these tunings are preferred by the majority including myself—but sometimes you just can’t help but crave for something fun: a set with boomy bass and energetic high frequencies. That’s exactly what the 7Hz Elua offers, so let me share my experience with it in this review.

Here are the gears that I've used in order to write this review:

DAC/Amp: Jcally JM7l or Fiio Q3 MQA
Phone/Device: Either my iPhone XR or my laptop
Music player: Spotify and Tidal

BUILD QUALITY, DESIGN, AND COMFORT
The Elua's build quality is fairly average. Each shell houses two dynamic drivers and is made from sturdy, relatively thick plastic with a metal faceplate. The IEM is medium-sized and not physically fatiguing to wear, even during extended listening sessions. The cable, on the other hand, is thin and soft, with minimal microphonics. However, the cable’s build quality could be improved, and the same applies to the included eartips.

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SOUND IMPRESSIONS
As I mentioned earlier, this IEM features a nicely tuned V-shaped sound signature. The lower end is neither bloated nor pillowy, and the high frequencies are not overly aggressive or peaky. The Elua sounds very dynamic, with the bass, mids, and treble complementing each other seamlessly across the board. It’s a proper V-shaped IEM, striking the perfect balance between being fun and clean.

Bass
The bass is well-bodied, sounding full and satisfying with good note weight, thanks to the boosted sub-bass. The transition from sub-bass to mid-bass and into the lower mids is relatively steep, resulting in a well-controlled and rich lower end. The bass is more boomy than punchy, but the detail in this range is surprisingly good.

Mids
Despite being a bass-centric set, the midrange retains clarity. The mids are clean and balanced, avoiding both thinness and excessive thickness due to the well-tuned lower mids. While vocals are not overly forward, they may occasionally sound slightly overshadowed by the treble region in certain tracks. Nevertheless, both male and female vocals maintain a natural and pleasing tone.

Treble
The treble is lively and energetic, with a slight hint of peakiness that can occasionally come across as sharp. However, it complements the bass region well, contributing to the dynamic and engaging V-shaped tuning. The treble also provides a good amount of air, enhancing the sense of space and making the soundstage feel larger. Although the frequency graph might suggest the treble is aggressive, but when used, it is not overly so. While it can be slightly peaky at times, the robust bass helps balance it out effectively.

Details, Imaging, and Soundstage
Details, imaging, and soundstage are not the Elua's greatest strengths. However, when compared to other sets within its price range, it holds its own and remains competitive, though still fairly average overall. This is likely due to its tuning, which prioritizes a fun sound signature over meticulous detail. Achieving both fun and high detail at this price point is understandably a challenge.

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CONCLUSION
When you think of a fun-sounding V-shaped IEM, you might assume it sacrifices clarity. While this is often true, the 7Hz Elua breaks that mold. It delivers a sound profile that manages to be both exciting and clean, proving that you don’t always have to compromise between enjoyment and precision.

The Elua strikes a remarkable balance in its tuning, offering a lively and engaging experience without losing control or clarity. In a sea of Harman-tuned IEMs dominating this price range, the Elua dares to be different, providing listeners with a refreshing alternative that feels vibrant and unique.

If you’re someone who craves an energetic sound signature with just the right amount of refinement, the 7Hz Elua is hard to overlook. It’s not just another IEM in the budget category—it’s a set that invites you to rediscover what fun truly means in audio, and it does so without breaking the bank. Whether you're a seasoned audiophile or a casual listener, the Elua’s dynamic presentation is sure to leave a lasting impression.

UNAFFILIATED LINK
https://www.linsoul.com/products/7hz-x-hbb-elua?_pos=1&_psq=Elua&_ss=e&_v=1.0

Cinder

Formerly known as Res-Reviews
Price-Conscious Dual Driver
Pros: V-shaped sound signature with distinct treble
2-pin cable, flat “braid”
Neutral, well-toned midrange
Excellent sub-bass tone
Good mid-bass shaping
Cons: No carrying case
Upper treble borders on “too sharp”
Occasional treble smudging
Rotated 2-pin connectors are uncomfortable
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7hz Eula Review: Price-Conscious Dual Driver

The Eula Attempts to Bridge the Gap for Mass Appeal​


7hz is an established brand in many audiophile circles. They’re well-known for competitive IEMs like the Zero and Timeless (II) and have a history of pushing innovative techniques in low-cost products. Today we’re taking a look at the 7hz Eula: a dual-driver IEM built in collaboration with HBB and sold at a highly-competitive price point. While HBB collaborations are a dime-a-dozen in 2024, there’s good reason to not hand-wave the Eula away. Let’s take a closer look at it.
You can find the Eula for sale here, on Linsoul, for $30.

About My Preferences: This review is a subjective assessment and is therefore 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.
Testing equipment and standards can be found here.

Tech Specs​

  • Impedance: 18Ω
  • Sound Pressure Level: 107 dB/V @ 1 kHz
  • Frequency Range: 10–20,000 Hz
  • Total Harmonic Distortion (THD): <0.5% @ 1 kHz
  • Transducer Type: Dynamic

Sound Signature​

Sonic Overview:​

7hz is targeting an “analytical but fun” sound with the Eula. They’re leveraging its second driver to add some extra oomph to the lower register without compromising on bass control. I generally like this strategy, as it permits the Eula to maintain a fairly tidy V-shaped sound signature without sounding too exaggerated or bloated. Its mids are warmer than neutral, and its treble has a few peaks for added clarity and separation.

Sonic Breakdown:​

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

The Eula’s bright upper register is tuned for fans of true V-shaped sound signatures. It features a lifted treble, with an extended, emphasized upper treble. It doesn’t “sparkle” the way one might find with a high driver-count BA/EST hybrid might, but it is still articulate and well-shaped. But, unlike its hypothetical hybrid competition, the Eula has a very cohesive treble timbre that is free from tonal stiffness.

Detail retrieval and articulation is above average for this price-point. And, while the Eula’s treble is certainly not surgical or extraordinarily penetrating, it does grab enough texture and micro-detailing to deliver on its overall “fun, but still precise” vibe.

The Eula’s treble is overall fairly well-toned, but does have moments where the upper-treble sounds less-than organic. Certain styles of mastering can make this over-emphasized spike more noticeable, particularly when there are many concurrent high-hat slams or harmonized string instrumentation. This deviation from natural emphasis isn’t a deal-breaker for me — but it might be for you if you are very sensitive to treble tone.

Midrange: Songs used: Flagpole Sitta, Jacked Up, I Am The Highway, Dreams, Too Close, Little Black Submarines, Bohemian Rhapsody, Cash Machine, Chasm

Unlike its treble, the Eula’s midrange is well toned in its entirety. It is largely uncolored, with only a minor warm tint in its lower mids. This clean, but weighty, implementation makes the Eula well-suited to staging vocals. Male vocals, such as those in I am The Highway, are reproduced with a satisfying depth. Texture and vocal nuance and reasonably well-captured, with the Eula only smudging very fine details. Female vocals are portrayed with a similar competence — Chasm’s desperate lyrics ring out with a familiar and natural timbre.

Guitars, particularly acoustic ones, sound excellent through the Eula. Its drivers capture a ton of detail from them and weight the plucking of strings with a gratifying tactility befitting a dual-dynamic-driver IEM. Electric guitars sound good as well, especially when distorted. The Black Keys’ low-fi solo in Little Black Submarines is well-articulated, dynamic, and energetic.

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

The Eula’s dual-dynamic driver setup yields pretty great bass performance, particularly for an IEM in this price range. Its midbass is well-controlled and robust, while its sub-bass has an organic and satisfying depth. Sub-bass is a little less controlled than the mid-bass, but not to the point that it detracts from most songs. General articulation in the Eula’s lower register is good — again, especially when you consider how cheap the Eula is.

In terms of bass quantity, the Eula ranks a little above average. It has less bass than some of 7hz’s other budget IEMs, but this is more of a tuning choice than an indictment of the Eula’s ability to move air. The Eula’s sub-bass comes on strong and is often a little more pronounced than its mid-bass. This is a very “I have a big subwoofer” kind of sound that you might get in a full-speaker setup — its a charming characteristic that makes electronic and rock music alike engaging and dynamic. This type of tuning trades absolute control and shape for a more relaxed presentation of sub-bass depth. If you’re a fan of speaker-driven audio, the Eula’s bass will feel familiar to you.

Packaging / Unboxing​

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The Eula’s packaging is compact and basic — but the IEMs appear to be well protected. At this price-point, I’m surprised that IEMs even have real packaging, so I’m not complaining.

Build​

Construction Quality​

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7hz went with clear plastic shells for the Eula. The shells’ faceplates are plastic as well with a contrasting set of textures.

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The Eula’s nozzles are also plastic. Beneath the lip of the nozzle rests a metal flower-patterned debris filter.

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On the top of shells you’ll find the 0.78mm 2-pin sockets. A red dot of paint sits next to the rear socket denoting pin orientation. The sockets appear to be similar to the ones used in the 7hz G1.

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I usually dislike the cables that come with budget IEMs, but the Eula’s cable is actually pretty decent. It is terminated with a 3.5mm jack and features a simple flat-braid design. The Y-splitter, shell, and 2-pin connectors are all housed in a clear plastic.

The cable is thin, but not particularly cheap-feeling. Sure, if you compare it to a custom cable from Plussound or Effect Audio, it will be tangibly worse-constructed — but a single cable from those companies costs more than five or six copies of the Eula. The cable’s flat form-factor makes it easy to coil and resistant to tangles. A thicker cable would be welcomed, but is certainly not necessary.

Comfort​

Disclaimer: comfort is a highly individual metric — no two people will have the same experience.

I found the Eula to be of average comfort. It has a decent passive seal in my ears with the included eartips, and can be worn for around an hour without any major discomfort. It is worth noting that 7hz designed the Eula’s 2-pin cables to sit at a pretty steep angle relative to the center line of the shell, meaning its earguides are rotated to face the wearer’s head. Usually, that angle is softer, and for me, more comfortable.

Accessories​

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Inside the box you’ll find:
  • 1x 3.5mm cable
  • 6x pairs of silicone eartips
This is a fairly sparse accessory package, but is certainly better than nothing. SIX sets of eartips in a $30 IEM is a welcomed surprise and should let buyers find a good seal without resorting to third-party eartips.

The absence of a carrying case is worth noting — if you don’t already have one lying around, consider the Eula to be $5–15 more than its MSRP — you can’t just shove these in your pocket after all.

Comparisons​

1: 7hz G1 ($35)

The G1 is a warmer, bassier IEM. It leans heavier on its lower register to provide maximum fun while turning down treble, relative to the Eula. The Eula’s bass is better-controlled and a little better balanced overall, with a much more realistic “woofer” style tuning.
The G1’s shell’s are much nicer, since it is made out of metal. They’re also more comfortable for me, particularly on long listening sessions. Both IEMs get an decent seal for me, though the G1 has slightly improved passive isolation. The G1’s cable is much worse than the Eula’s though — it looks and feels cheaper.
Which IEM is better? Well, they’re both cheap dynamic-driver IEMs aimed at an exciting-but-affordable sound signature. The G1 will better-suit you if you are ergonomically sensitive (or require the IEM to come with a case). The Eula has a more balanced overall presentation with a brighter treble and more solid bass. Preference is key here — and my preference leans towards the Eula.

2: Tripowin Vivace ($29.90)

The Viviace is a good 1-to-1 comparison with the Eula. It has a very similar MSRP, no included carry case, and a similar target audience. The Vivace has a cooler midrange with a more emphasized upper-midrange. It has a less-peaky treble that pulls a little more detail and texture than the Eula. The Eula has a less emphasized mid-bass with a similar emphasis on sub-bass.

The Eula is essentially an inverted-emphasis Vivace, with both IEMs tuning towards each-others weaknesses. This is a much more difficult assessment than the Eula vs G1, as the Viviace’s technical chops contrast against my personal preference for the Eula’s warmer lower-midrange. The Viviace does have a little more top-end resolution — and that’s what strikes me the most. The Vivace is never sharp (the Eula is, on occasion) and still sounds a bit more textured in the upper-register.
Bass-lovers might find the Eula’s second driver gives them the open-air sub-woofer feel that they crave — and that’s fine. My partiality towards the Vivace’s ability to pull texture makes it my personal choice.

3: ivipQ Shanhai ($46-$60)

In spite of having an entire extra driver, the ivipQ Shanhai actually has a less-dramatic tuning than the Eula. Its bass is less emphasized, its upper mids don’t peak as hard, and its treble isn’t so far forward. The Shanhai’s more-mature tuning is aimed at discerning listeners, while the Eula prioritizes overall dynamics and “fun”. The ivipQ Shanhai doesn’t come with 3.5mm cable (it has a 4.4mm standard), but does include a rather spacious carrying case.

The increased cost with the Shanhai does get you a higher-resolution, more balanced IEM — but again, its 1.5–2x the cost. The Shanhai’s treble is cleaner, less peaky, and more extended, while its upper midrange has a more linear, less recessed presentation. The Eula’s bass, however, is a lot more enjoyable for “party music” and other fun-first genres.

Listeners seeking a more analytical IEM will definitely prefer the Shanhai. Those who are budget-sensitive or preffer V-shaped / bassy sound signatures might still prefer the Eula, in spite of its less-mature tuning.

Conclusion​

The Eula is competent Chi-Fi budget IEM. It doesn’t stand out too much from the crowd, but its budget pricing makes it a low-risk purchase for those who are curious about it. It’s not a giant-killer, but that doesn’t mean its not worth listening to.

Who This is For​

  • Listeners on a budget who want excellent sub-bass quality
  • Buyers who want a V-shaped IEM isn’t too dramatic
  • Customers who enjoy bright IEMs

Who This isn’t For​

  • Those who are sensitive to treble
  • Listeners who are particular about ergonomics
  • Listeners who want an all-out bass-head IEM
As always, happy listening!
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Ianbanz

New Head-Fier
7Hz x HBB Elua IEM : Budget Bass Bliss
Pros: 1. Deep, Powerful Bass: Subbass delivers a rumbling, immersive experience without overwhelming the overall sound.

2. Treble Clarity: Elevated treble adds detail and prevents the sound from becoming too dark or muddy.

3. Comfortable Design: Lightweight, ergonomic shell ensures fatigue-free listening even during extended sessions.

4. Solid Imaging: Accurate instrument placement and directional audio make it great for music and gaming.

5. Dynamic Performance: Handles soft and loud passages with ease, enhancing the listening experience.

6. Budget-Friendly: Excellent value for the price, especially for bass lovers.

7. Gaming-Friendly: Precise audio cues make it a great choice for immersive gaming experiences.
Cons: 1. Amp-Dependent: Requires proper amplification to achieve balanced mids and optimal performance.

2. Recessed Mids Without Power: Mids can feel distant with weaker sources, emphasizing the V-shaped tuning.

3. Peaky Treble Pre-Burn-In: Treble may sound sharp initially and smooth out only after burn-in.

4. Moderate Soundstage: While natural and intimate, it lacks the expansiveness of higher-tier options.
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Collaborations between brands and audio reviewers often generate a buzz, and the 7Hz x HBB Elua is no exception. This partnership combines 7Hz's proven technical prowess and with the tuning of Bad Guy Good Audio Reviews (HBB), promising a sound profile that's both accessible and fun.

That said, it’s hard not to feel a bit overwhelmed by the sheer number of HBB collaborations this year. Has it been three or five in just the last couple of months? Honestly, it’s starting to feel like HBB might be spreading himself a little too thin. While his signature style delivers hits more often than misses, a bit more selectivity might preserve the excitement for each new release.

That being said, I can't deny that I’ve enjoyed most of HBB’s collaborations. Sometimes, I just want a hefty dose of bass to shake things up, and his tunings often deliver on that craving. True to form, the Elua stays on brand, with bass taking the spotlight—a hallmark of HBB’s tuning philosophy. Here’s hoping it lands firmly in the “hit” category!

What is in the Box:



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Build and Design

The Elua strikes a fine balance between elegant looking and simplicity, with an understated design that prioritizes comfort and practicality over flashy aesthetics. Its shell, made from lightweight yet durable plastic, features a shape that closely resembles the 7Hz Five—a personal favorite of mine. This familiar design offers a snug and secure fit, making it perfect for long listening sessions without causing fatigue. While the Elua may not turn heads with flamboyant styling, its minimalist approach is a win for those who value function and subtle sophistication.

The nozzle is well-designed, with a length and angle that is just right, that also provide an excellent seal with most ear tips, enhancing both comfort and passive noise isolation. This design ensures a consistent listening experience regardless of tip choice.

The included cable is serviceable—basic but reliable. It exhibits no microphonics and feels., durable enough for regular use. While it doesn’t push boundaries in terms of design or material quality, its 2-pin connector offers versatility, allowing users to upgrade or customize as needed. For this review, I swapped the stock cable with the flat design cable from the 7Hz Five. The combination not only enhanced the aesthetic but also provided a tactile improvement, proving how small tweaks can personalize the listening experience.

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Here is a graph comparing the Elua and Legato, as you can see the prominence of the subbass on the Elua compared to its more expensive sibling the Legato. personally i really like the Elua better, its much more detailed and have better treble extension, but the Legatos tonality and timbre have better quality and more natural sounding.

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Sound Performance

The 7Hz x HBB Elua delivers a sound signature that leans heavily toward the low frequencies, with a strong emphasis on subbass. This is balanced by elevated treble, which adds clarity and detail, thanks to its well-extended range. However, the treble can sound a bit peaky if the Elua hasn’t been properly burned in.

It’s important to note that the Elua requires proper amplification to achieve its intended tonal balance and dynamic sound. While you don’t need to crank up the volume to enjoy it, having enough volume headroom is essential. When adequately powered, the midrange becomes more forward and lush, blending smoothly with the lows and highs for a cohesive listening experience.

Without proper amplification, the Elua tends to sound very V-shaped, with recessed mids. In this case, the focus shifts predominantly to the bass and treble, leaving the midrange less prominent. To unlock its full potential and to truly enjoy the Elua, pairing it with a capable amp is highly recommended.

Bass

The Elua’s low end is where the fun begins, delivering a performance that feels akin to having a compact subwoofer nestled in your ears. The subbass reaches impressive depths, offering a generous rumble that adds weight and excitement to your music. It’s the kind of bass that doesn’t just play — it resonates, creating a visceral, immersive experience.

The midbass, though not particularly punchy, compensates with its cleanliness and well-defined texture. It doesn’t overshadow the subbass but complements it, adding body without bloating the overall sound. This tuning makes the Elua versatile across genres. While it’s a delight for bass-heavy tracks like hip-hop, EDM, and techno, i also enjoy it with genres like jazz and accoustics, where clarity and precision in the low end are crucial.

What truly sets the Elua apart is its ability to strike a balance between fun and fidelity. The dominant subbass provides the thrill, yet it never overwhelms. This balance allows it to adapt seamlessly to a wide range of musical styles, making it not just a basshead’s delight but a somewhat well-rounded performer.

Mids

When paired with a weaker source, the midrange can sound recessed, causing vocals to feel distant. This imbalance often makes the treble seem sharper and the subbass overly dominant, overshadowing the mids. However, with sufficient amplification or a more powerful source, the midrange truly shines. Vocals gain clarity and natural tonality, moving to a more forward and prominent position in the mix. This enhanced presence also smooths out any potential harshness in the upper mids, resulting in a more balanced and enjoyable listening experience. Instruments within the midrange exhibit average separation but with an organic timbre, delivering a natural, effortless sound that feels lifelike.

Treble

The treble of the Elua is thoughtfully tuned to counterbalance its bass-heavy tendencies, ensuring the overall sound doesn't veer into overly dark or muddy territory. By incorporating a deliberate peakiness, the treble introduces much-needed clarity, detail, and a sense of spaciousness to the soundstage. This clever tuning choice enhances the cohesiveness of the Elua's sonic profile, preventing it from becoming overly bass-dominant.

The treble even though its design to be more prominent it still manages to be smooth and non-fatiguing, so you can enjoy the Elua for extended listening sessions without causing ear fatigue—a boon for those who enjoy long hours of music. While it doesn't exhibit the shimmering sparkle or airy extension characteristic of more treble-forward IEMs, it makes up for this with excellent control.

Technical Performance

Soundstage: Moderately wide with a natural sense of depth. While it doesn’t create a grandiose sense of space, it feels realistic and intimate.

Imaging:
For an IEM with a bass-forward tuning, the imaging on the Elua is impressively precise. Instrument placement is accurate, allowing for easy identification of elements in well-mixed tracks. When i use this with my Meta Quest VR goggles for FPS shooter games, the Elua's accuracy rivaled that of many popular gaming IEMs or headphones currently on the market. The ability to locate directional audio cues with such precision enhances gameplay significantly. This makes the Elua not just a great option for music but also a fantastic choice for immersive gaming experiences. I can confidently recommend it for gamers seeking excellent audio performance.

Resolution:
The Elua provides solid detail retrieval for its price range, though it prioritizes a smooth and enjoyable listening experience over analytical precision. While it may not expose every micro-detail in your music, it strikes a great balance by delivering clarity without harshness, making it easy to enjoy extended listening sessions.

Dynamics:
The Elua handles dynamic shifts exceptionally well, showcasing a commendable contrast between softer and louder sections in complex tracks.

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Conclusion and Final Thoughts

The 7Hz x HBB Elua is a bass lover’s dream wrapped in an unassuming yet practical design. It delivers a sound signature that boldly emphasizes subbass while maintaining a sense of clarity and balance across the frequency spectrum—when properly powered. Its approachable price point and versatile performance make it a standout choice for those looking for a budget-friendly IEM with a fun, engaging sound.

The Elua’s strengths lie in its ability to seamlessly blend a commanding low end with treble clarity, creating a sonic experience that’s both immersive and fun. The subbass provides a deep, rumbling foundation that complements bass-heavy genres, while the treble ensures that the overall sound doesn’t become overly warm or congested. However, the mids can take a backseat with weaker sources, so proper amplification is crucial to unlocking the Elua’s full potential.

Build quality and comfort are equally impressive for its price, with a lightweight and ergonomic design that ensures fatigue-free listening during extended sessions. While the included cable is serviceable, swapping it out can enhance both aesthetics and tactile experience, allowing for some level of personalization.

On the technical side, the Elua punches above its weight. The moderately wide soundstage and precise imaging make it not only a solid option for music but also an excellent companion for gaming, where accurate audio cues are paramount. Its smooth tuning and dynamic handling ensure that listening remains enjoyable without venturing into harsh or fatiguing territory.

Final Verdict:

The 7Hz x HBB Elua is a budget IEM that knows its audience. It’s tailored for bass enthusiasts who want a thrilling yet controlled low-end experience without compromising on treble clarity. While it might not be the most neutral or analytical option, it excels in delivering fun and energy, making it a great choice for casual listeners and gamers alike. If you’re seeking a bass cannon that doesn’t sacrifice overall cohesion, the Elua is a worthy contender that delivers impressive value for its price.

Link: https://www.linsoul.com/products/7h...0UXfKnNCfIzrR--d3t_IEi5kIM0XwHultS_xAnSNWeqPD
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