TENHZ P4 Pro

Intro
Neither AUDBOS nor TENHZ was known to me until now, but they already have a quite wide product range with any kind of dynamic & pure BA-In-Ears, as well as hybrids, among which there are technically some very interesting models. One of them is definitely the P4 Pro, which as the name suggests is an extended version of the P4, but which I can't compare.
I can already tell you here that the P4 Pro is a power in vocal-oriented music, as well as in spatial representation.



Handling
From the design point of view, we get a universal In-Ear in a custom look, as it can now be found in many IEMs. Synthetic resin in 3D printing and a compact design in spite of multi-drivers belong to the good manners in the Chi-Fi world (I leave out some Knowledge Zenith, CCA, or KB-EAR models), which is reflected in a very pleasant wearing comfort and good isolation.

Included are foam tips in three sizes and the same with silicone tips. In addition there is a very valuable hard leather case and a MMCX cable, which is silver coated, but qualitatively rather average.

Due to the precise 3D print, no sharp edges or unevenness are to be expected and the BA drivers, the crossover and the sound tubes can be easily recognized. Especially through the latter one notices that this is a product beyond the 100€ mark, as cheap Chi-Fi-IEMs most simply place their drivers somehow in the case without creating a clear separation. This means that the sound is then reflected unhindered in the case, which can sometimes backfire. Here the sound of the individual drivers is first bundled in the sound tube and transferred to the ear.



Sound
You like a mid-centered sound with a largely linear frequency response? Have fun with the TENHZ P4 Pro!

The P4 Pro is not an IEM that wants to score with its bass performance. The bass is clean and detailed, but not powerful enough for me, especially in the sub range, so that I find it a little harder to recommend the P4 without restrictions for some genres. The Knowles driver used can actually do more, but was apparently deliberately tamed to make the signature appear more neutral. But this causes me to lose some of the naturalness in the low frequencies, because bass drums don't sound full enough and even when the kick is present. However, it looks a bit different with electronically generated bass drums. The P4 Pro seems to cope better with this and you notice that some pressure is missing, but it can be arranged well, especially if you are used to the whole signature. All in all, the result is a solid, clean bass that emphasizes the midrange more and resolves well.

The heart of the P4 Pro is clearly the midrange. Vocal-heavy music and instrumental tracks are a real pleasure. The voices move a bit more into the foreground, which corresponds to my preferences, and in the upper midrange you should pay a little attention to the volume, since there are also small slips into the unpleasant, but this should not diminish the overall performance of the mids. The separation is very well done and the clarity and naturalness of the individual instruments and voices is remarkable. You really get lost in small details, which the P4 Pro brings to light very well due to its resolution and precision. Even though the bass doesn't play an important role in the signature, the mids don't look too thin, even in the lower range, but provide a healthy body, which makes the mids soft and warm overall, but in return also directly in the response and realistic. You shouldn't be deceived at first that the P4 Pro sounds a bit flat, this changes after a short familiarization.

The highs are bright and transparent. They spray some gloss in the upper area and have a decent extension. At the same time, they remain insensitive to sibilants due to the depression in the 6-8 kHz range. Likewise, no unpleasant peaks can be detected in the high-frequency range, which makes them pleasantly relaxed even for longer listening sessions. You have to be more careful with the mids. I appreciate this more than other pure BA-IEMs (e.g. BGVP DM6), which prefer the high frequency range almost too much. You can also uncover details without having to go to the pain threshold. This makes the difference. The P4 Pro therefore does not sound quite as airy and brilliant in the upper range, but shines with definition and texture.



Outro
If you listen to chartmusic with the P4 Pro, you could accuse it of emotionlessness and boredom! If someone describes the P4 Pro that way, I couldn't blame him either. It doesn't have the usual V- or W-signature, but rather tries to use a signature which emphasizes the midrange, for which the brain needs some time to adjust.
But if you feel at home in singer-songwriter, acoustics, jazz, or orchestral music, you'll quickly see what's special about the P4 Pro and learn to appreciate it, with its precise, warm and charming style, but also the one or other shrill slip in the upper mids.
Rock, EDM and pop music are not necessarily the strengths of the P4 Pro. The pressure and the power in the bass range are clearly missing and the emphasis of the mids could lead to fatigue. However, this music is not a No-Go either, just a pleasure with some limitations. Even those who prefer voices to be more on the same level as the rest of the mix probably won't be completely satisfied with the P4 Pro.

The P4 Pro is certainly not perfect, but I see something special in it and like to pick it up every now and then to avoid getting too used to a signature on the one hand, but on the other hand because I enjoy losing myself in details and appreciate the ingenious voice reproduction and separation, always with a squinting glance at the volume, which is enormous due to the low impedance.

https://www.linsoul.com/product-page/TENHZ-P4-PRO-EARPHONE

ALIEXPRESS
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TENHZ previously Audbos is another newcomer brand which I bet you can already guess where they have risen from, and ready to slug it out with the Magaosi’s, Shozy’s and the Kinera’s with their overall similar build silhouettes and pricing schemes. The TENHZ debut wasn’t shy and right off released 2 offerings, the TENHZ K5 and the P4Pro which was sent to by Linsoul and DD Audio in exchange of an honest review,you can check it out or grab a pair from the Linsoul Amazon site and DD Audio AliExpress site.

The TENHZ P4 Pro is spec’d out with 4 Balanced Armature drivers, one being the 22955 Knowles BA drivers for the bass and 3 TENHZ-developed BA drivers for the midrange and the highs. TheP4 Pro housing is made from 3D printed smoked resin and has a pseudo-ciem silhouette which reminded me of how the Kinera H3 got popular with. It has a10Hz-40kHz Frequency Response, 26 Ohms Impedance and an 110dB Sensitivity.


The TENHZ P4 Pro came in a simple white cardboard box adorned with the P4 Pro outline, accessory set description and its FR chart. Pulling up another cardboard insert will immediately reveal a lovely brown leather case with a metallic slab of the TENHZ Audio brand, the inside of the case is black velvet and indeed had enough space to store the P4 Pro’s unlike some of the recent cases that came with some earphones that barely fits making storage of earphones a cumbersome. Underneath the case is the warranty card and manual and completely lifting up the cardboard insert will show the P4 Pro along with a set of red barrel black silicon ear tips (S, M, L)and another set of black foam ear tips(S, L) with the M being pre-installed on the P4 Pro.
The P4 Pro is made from 3D printed smoked resin which shows no weird jagged edges and the internal wiring can be discreetly observed which was done well. The BA drivers are clearly observable as well especially the 22955 Knowles BA drivers and there are also 3 tubes connecting the BA drivers directly to the nozzle covered by a metal mesh and has a lip making ear tip rolling welcome and the MMCX connection is also done well on the P4 Pro.
The stock cable comes out as silver which led me to assume that this could be another silver-plated copper due to the absent of actual cable specification from the manufacturer themselves. A touch of tension can be immediately noticed on the cable making them easy to fold and keep while still not retaining the folds. It uses a matte silver straight gold-plated 3.5mm plug with a clear strain relief, the aforementioned tension makes the strain relief somewhat a redundancy. The Y-split is a matte silver barrel type one and the MMCX housing is once again clear with a nice clear memory wire for over ear usage which did its job well. Microphonic noise is almost zero.

Being marketed as a completely transparent earphones made me wondered if it was for the overall look of the P4 Pro due to its smoked shells and the clear cables used or the sound itself, yeah whatever I think then. The P4 Pro came with foam ear tips although I chose to grab the Comply T500 for the realview, 16/44 FLAC files off the xDuoo X3ii and the Sony CAS-1 via an MSI GF62-8RE and Foobar2000 v1.4. The P4 Pro overall gave a flat signature with an emphasis on the upper frequencies which eventually gave the great synergy it had with the Comply foams ability to clean the upper end and amplify the lack luster low end.

I haven’t had the chance to try any Audbos products from where the TENHZ brand sprouted off although from the P4 Pro’s low end performance it would be safe to say they might have indeed had a hard time creating a smooth and clean low end. Anathema’s Distant Satellites provided a soft mid bass and a non-reverberating feel for the sub bass drops. Decay was a tad slow on the bass and speed suffered as well making the low end give out an overall lingering feel towards the lower midrange spectrum.

It is probably expected already for the Midrange to do some heavy lifting with how the low end performance of the P4 Pro extended towards the midrange territory. Michael Jackson’s Baby Be Mine showed how the lower midrange was able to compliment the low end bleed and render the midrange sound relaxing yet still sounding distinct and breathy with how the upper midrange was extended. Male and Female vocal and midrange oriented tracks did great on the P4 Pro, something to be retained in case TENHZ releases another IEM.

With my personal preference for the Bright signature, checking the high frequency performance is always a welcome experience. The TENHZ P4 Pro came to my party sporting an already weak low end while parading a great midrange. Daft Punk’s Beyond right off the bat highlighted the P4 Pro’s midrange strength and masking the low end although at the 0:43 mark, the sudden burst of the highs showed where the middle ground of the P4 Pro is, its highs. The intermittent delivery on the highs while still being detailed and delicate made the P4 Pro sounded flat overall and the then lackluster low end performance finally made it a welcome tuning.

Taking cue from the higher ups, I pulled out another Daft Punk track, this time the “Within”. The P4 Pro created its stage rather intimate than wide. Imaging was definite with a clear sense of its separation against the different instrumental and vocal deliveries. The intimacy created by the P4 Pro supplemented an already great midrange performer with its strong points being on the acoustic genre. I’ll be enjoying using this on some alone time, too bad alone time is rare for me.

The TENHZ P4 Pro relies heavily on its clean silhouette and great leather case with a flat signature implemented cleanly without being off tone nor off with its timbre delivery.The cable is just what you need really; stays in place, easy to store and the stellar absence of microphonic noise without giving up being looking good and not weird. The sound is easy to the ears and to like especially with its peers being either strongly implemented with a warm sound or a distinct bright performer,the P4 Pro will keep a welcome companion on the flat sound signature. Did I say that they sit comfortable on the ears too? With all those said, would I recommend the Tenhz P4 Pro? Read the realview again.

More realviews on my site, http://audiorealviews.site/

Disclaimer 1 - From which place do i talk ?

Hi! First of all, let me introduce to you, so you can evaluate my opinion better.
I am a young hobbyist who got into this world with one aim, hear music better. With time, of course the hobbie takes body and becomes a equaly fun part. I have been having experience with plenty of sub 50$ earphones untill i got myself a Tehnz p4 pro and Bgvp dmg, 100~150 Usd. So i am here to share my view at this new segment to you guys tracing the same path.

Disclaimer 2 -

This IEM was bought with my own money with a discount in exchange for a honest review, at AK AUDIO STORE in aliexpress. There wasn't any attempt to manipulate my opinion and all of the words are by my responsibility.

You can found ak store and p4 pro here: https://www.aliexpress.com/store/pr...ml?spm=2114.12010612.8148356.5.3cc521611fpauj


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Myself and tre aim of this review

A lot of the consumers of chi-fi live at the so-called third world countrys, living by the punishment of the currency, we often pay a much bigger fraction of our paid work at the same iem, it's like people in the US was paying 400$ for a shure se215 for example.

With that being said, we always look for the best cost benefit, also at free shipping oportunities, on this context, the chinese market of IEMs becomes perfect.

I have about 3 years since i started at this world of audio. In that time i have had KZ ATE, KZ ZST, ZSR, ED12, UiiSi CM5 and buch of other cheapos...

After that i jumped on a little bit higher bracket and had in my hands, Revonext qt2, TRN v80, Tin audio t2, Hifiman re-400s...

But i had a feeling of more of the same, so i sold many of them and jumped on the +100$ range....

With bgvp dmg and p4 pro I looked for a real upgrade, at all areas, did i got it ? Yes i got it.


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With the Tehnz p4 pro i looked for a reference sound, having the tin audio t2 in mind, and i can say that i got way more than i expected. The sound is neutral, but with weight and body throughout the whole sound, what is missiig at the tin audio t2. I have been listening to the IEM for about a month and all the "burn in" period is gone.

Specs

• Tenhz
• Color: Black
• Driver unit: 4 balanced armatures ( 1 Bass Knowles 22955)
• Frequency response range: 10 Hz–40 kHz
• Sensitivity: 110 dB +/- 2 dB
• Impedance: 26 ohms
• Connectors: ⅛ in (3.5 mm)
• Cable length: 4 ft (1.2 m)

Included

• Microphone cable
• Silicone ear tips
• Foam ear tips
• Storage case

Tehnz is a split company from the well known Magaosi, it was previously named as Audbos, this IEM is a update of the well reviewed Audbos p4. The p4 pro should have a less "cavernous" sound when compared to the audbos, having less mid bass.

The Fit: This IEM have a similat fit to "custom iems", it fits like a glove on mt ears, after some time it can bother me as they are 100% sealed, so keep that in mind, they provide the most isolation i have ever had with any iem. At noisy envirements it's awesome. These is the kind of earphone you can listen at the bus without losing quality while not necesseraly being a basshead iem. I dig the fit of this earphone. Love it. I use a small tip, usually i use medium or big, but these earphones fit so well that i can use the small one.





Accesories: The carry bag is pure luxury, i don't use that kind of thing but i can tell you, this is from a very good quality and about the best you can get at this or even bigger prices. The original cable is bealtiful, but bad... it tangles easily and can bother some people. I use them on my dmg and the Dmg cables here on the p4 pro.

The iem comes with 3 pairs of generic silicone tips and 3 pairs of foam. Decent quality. Overall with the fancy box and carriyng box, the sturdy and bealtiful IEM's, we have a very nice presentation here.

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Let's talk about what matters. SOUND.

My preferences: My perfect signature would be a neutral to a slight U signature. I like correct, thick mids. A good extension at highs. Bass needs to be present but not overly. I prefer sub-bass presence with agility than exactly a mass hiting my ears.

With that being said, the tehnz p4 pro becomes close to check all of the boxes, but at the same time it don't... lol. let me try to explain it.

Tonality: Tonaly, for me, these earphones are close to perfect, they missed the extension at the highs, altought it can be easily achieved with EQ and is the only frequency that responds easily to eq, maybe the only drivers that aren't super stressed. They are neutral with a small bump in mids wich i like very much. Bass isn't really recessed, they don't roll of like a tin audio t2 for example. Mind a Neutral to very slight inversed U signature. Warmish.

BASS: At the good enviroment, these are both tonaly and technicaly correct. I have a hifiman he4xx planar magnetic earphone, i think you should imagine that bass closer to a planar than a dynamic. First, they don't respond to eq, the drivers are stressed and with eq they distort and muddies other frequencies, just like my he4xx. But you really don't need to do that beacause the bass is present enought to drive the music. If yoi have a reference perspective. This is not a basshead earphone, at all. The bass has a pretty fast decay, doesn't color other frequencies but the earphone muddies in a whole if you source try to colour the sound aplying any gain to the bass.

The bass is technicaly and tonaly correct, full and fast. But at the same time it is the Engineering aquiles hell of the earphone. The driver is so stressed that any gain will give you a muddie and distorted low end. Actually as the earphone offer a very good amount of bass - from a reference perspective - you can even cut a little on tracks that can stress the driver and clear the room for the sound. It works

MIDS. this is where all the magic happens, the best mids implementation i have seen in any earphone. Period. The timbre is correct altought its a overall warm tonality. The mid-highs transition in perfect, far from sibilance at the same time that the voices are very close to the ear. You can hear every nuance of the vocals, sometimes you can miss yourself as you get so much information with enough body and a thickness that i like and yet sound natural. Fantastic for intimate music genres. Here, i don't have any reservations.

Highs: As the transition from mids to highs are absolutely perfect for me. The highs limits itself to be great, but not perfect. I am sensitive troughout the whole sibilance area, but i can enjoy a good extension at 12-16 khz, it gives a sparkle that i personaly like. As the overall tonality of the earphone is warm, and its unique technical flaw is the less than ideal dynamics in low end, the tuning of the earphone was aimed at the sweet spot and confort zone of the drivers. The tonal balance it neutral to warm presentation. Bass driving fast, present and in a average size, with thick mids taking the whole show. All of the "presence" - above the mids - area sounds even. The highs gives the details, with a good postioning and almost no glaring. They are precise and don't splash everywhere. They are rolled off, i never saw anyone complaining about that and this would appeal to the majority of the public, but i would like a little more extension at the +12khz area. This would make them perfect for me. You can eq that and should try

Technicalities: Soundstage is average, definitely its a "in you head" sound. This is a effect of the rolled off treble, when you eq them that effect becomes way smaller and the stage gets more tridimentional. Imaging is very good, as there aren't any thin sound, you can fell the details better and as a consequence the imaging capabilities benefit from that. Decay is fast, a BA bass that remeber a little of a planar structured sound.



VS BGVP DMG:

Dmg's have better sub bass and recessed mids compared to p4. Less atack and energy in the low mids and slighly softer and yet bigger mid bass(dinamic driver...) making a more confortable experience but losing some presence at the low-mids. The DMG's are warm, but not bassy, It stay in the middle of the road because the bass on DMG'S are actually soft, the sub bass are only the needed and the emphasised mid bass are very controlled, no coloration in sound or leak to the mids. Compared to p4 the mids are thinner with emphasis in the high mids-treble transition. The p4 on the other side have very thick mids. On the DMG's the overall sound seem more rounded and easy to a V shaped used ear. The p4 feels heavier. Everything on DMG'S sounds somekind of thinner in comparison. But they aren't thin, do you get it ? The p4 can sound better sometimes, less musical other times where the dynamics of dmg's do better. Transition from high mids to treble on p4 are perfect for me, as they aren't after any valley, no information is missed and treble is easy on the ear. Very energetic and natural, some people are finding the treble pronounced, not my case.


Bottom line. This is the closest that i got from a gold signature. The earphone got a very good atack at the bass departament, it never fails to deliver the drive of the music. The mids in a word: perfect. The highs are great, perfect IF you are sensitive as they deliver great dynamics and can be even eqed to achieve a gold standard. Overall this a high fidelity earphone that don't hurt anyone but fails to be perfect. A jack of all trades. But at that price, everywhere that i read more experienced people tell me that they are doing way more than they should.
As i have little experience i tried to be very critical in this review so take that filter.

At 150$ these are a good value - having the well regarded dmg in mind -, i saw them at 118$ at aliexpress at sales, wich is great. Massdrop dropped them at 79$ wich is a screw steal. So, keep you eyes on this iem.

Thank you for reading and see you later!

Greetings,

Today we're checking out the P4 Pro, a quad-balanced armature earphone from the folks at TENHZ.

TENHZ you say? Another new brand, huh. Sort of, but not quite. You might recall Audbos, a spin off brand from Magaosi marketing primarily in the North American market. Back in early 2017 I reviewed the K3 and DB-02, both hybrids and competitive offerings in their respective price ranges. I'm not sure exactly when, but Audbos shortly split off to create their own independent products and to eventually rebrand as TENHZ.

The P4 Pro is one a couple products to emerge from the re-branding. Among the budget audiophile community it is rapidly cementing itself as a worthy purchase due to a crisp, detailed, neutral-leaning signature. After spending over a month with the P4 Pro, I'm going to have to side with the community. This is a great earphone that is well worth checking out, if that's the sort of signature you're looking for. Let's take a closer look.

Disclaimer:

Thanks to Lillian with Linsoul Tech for sending over a sample of the P4 Pro for the purposes of review. The thoughts within this review are my own subjective experiences with the P4 Pro and do not represent Tenhz, Linsoul, or any other entity. No financial incentive was provided to write this review. At the time of writing it was retailed for 120 USD: https://www.linsoul.com/product-page/TENHZ-P4-PRO-EARPHONE

Source:

The P4 Pro is super easy to drive and in no way requires a amp. Phone and DAP users should be able to get the most out of the P4 Pro no problem, just be sure to feed it quality content since it is fairly revealing. I used mine straight out of the Shanling M0 or paired with my LG G6 with the iFi Audio ieMatch helping quell hiss. It was also power by my TEAC HA-501 on low damping with my Asus FX53V or one of a number of other devices sourcing music. I also used it frequently over Bluetooth (LDAC / LG G6) plugged into the Radsone Earstudio ES100 which powered it beautifully.

Personal Preferences:

I listen primarily to various EDM sub-genres (liquid drum and bass, breakbeat, drumstep, etc.), hip hop, and classic rock. While I enjoy a variety of signatures in my headphones I generally lean towards slightly warm with elevated treble and sub-bass, an even and natural mid-range response, with reduced mid-bass. The HiFiMan RE800, Brainwavz B400, and thinksound On2 offer examples of signatures I enjoy. Note that I generally listen at exceptionally low volumes.

Specifications:

• Driver: 4 balanced armatures (22955 Knowles for bass)
• Impedance: 26 ohms +/- 10%
• Sensitivity: 110 dB+/- 1dB
• Frequency Response: 10Hz – 40Khz
• Max Imput Power: 10mW
• Distortion: =/< 2%

Packaging and Accessories:

The P4 Pro's packaging is fairly simple in the exterior design. Primarily a matte white, there are some flourishes here and there on the front. Along with the usual branding, there is a glossy image of the earphones themselves with the cable attached. Also present is the statement “Completely Transparent Headphones”. Not sure if they're referring to the sound or build. A clipart-style image of a record and player arm wraps around the bottom left and onto the left panel. On the rear you find a fairly extensive specifications list and a paragraph explaining the P4 Pro and it's features via roughly translated English. You might think that by now these companies would have worked to improve the quality of translations given how popular Chinese earphones have become in primarily English speaking countries. Not that it really matters though, since most people will extend maybe a cursory glance at the package before tossing it out. Below this paragraph is a frequency response chart free of the usual stylized flourishes popularized by more mainstream brands. Lastly, there is an accessory list. One item of note is “headphone cable with microphone”. No mic here.

Pulling the interior tray from the top via a white ribbon, you find the tray is split into two sections. The top half is filled with a very premium looking and feeling, magnetically sealed leatherette carrying case proudly displaying a small metal plaque emblazoned with the Tenhz Audio name and logo. This thing is nice and a very cool inclusion. The second segment contains the earpieces and tip collection placed within a foam insert. Underneath is the cable, neatly coiled and wrapped. In all you get:

• P4 Pro earphones
• MMCX cable
• Leatherette carrying case
• Single flange silicone ear tips (s/m/l)
• Memory foam tips (s/m/l)

The foam tips are of decent quality using a fairly dense, almost rubbery foam. I have quite a few of these kicking around and find they last a lot longer than Comply equivalents. Easy to wash too, if necessary. The silicone tips are the same generic set you get with numerous other budget earphones. While they work, they didn't give me an ideal seal so I swapped them out after my initial listen for some Sony hybrids, and later on, RHA's Dual Density tips

All-in-all, this is good accessory kit. The silicone tips are not fantastic, but everything else is worth keeping around, especially that awesome case.


Build, Comfort, and Isolation:

The P4 Pro features acrylic shells in a custom-like shape that is very similar to a number of products released in the last year and bit, such as the Kinera H3 and IDUN, and HiFiBoy OSV3. The smoky black/dark grey face plates contain the TENHZ logo in a contrasting silver. It's a subtle look that shouldn't attract a ton of attention. The rest of the shell is a transparent black that allows you to check out the internals, such as the individual sound ports for the various drivers. The crossover is a high point in the design since it is on full display at the base of the housing. The MMCX port on top is well-integrated, protruding maybe 1mm above the housing. This will be good for those that like to cable roll since there won't be any risk of larger plugs rubbing against the housing. It all feels smooth and well constructed with only a few minor flaws here and there, such as a single teeny bubble above the bass driver inside the right ear piece.

The cable is pretty average in my opinion. Where most of the competition is including really high quality braided cables with their earphones, the more traditional single-strand cable here comes across somewhat basic. The clear sheath revealing the shimmery wires within looks fantastic, but it's a touch thin and on the stiff and springy side. The straight jack is very small with a flare that makes gripping it easy, but the strain relief is too stiff to provide any real protection from tugging. It also looks very similar to the jacks I've got on a few sub-10 USD earphones. The simple, relief free y-split is much the same, taking away from the subtle, premium design of the ear pieces. Things improve leading up to the MMCX plug where you find an outstanding set of preformed ear guides which oddly enough, have a slimmer section at the very end acting as extra strain relief. Cool. The plugs themselves are compact, clear sections of plastic that look pleasing to the eye and feel durable. It's a fine cable.

Like other earphones using this shell design, the P4 Pro is extremely comfortable. The acrylic material is very lightweight so you don't have to worry about something heavy dangling from your ear canal. Since the shape is custom-like, the P4 Pro conforms well to your outer ear, locking itself into place securely. Those with especially small ears or those of an oddly shaped outer ear might experience some issues achieving a good seal. I expect the majority to be very pleased with the way the P4 Pro fits.

Given the ear filling shape and lack of any ventilation, the P4 Pro has great isolation. Not uncommon for pure-BA products. With silicone tips and no music playing, the P4 Pro makes for a great set of ear plugs, dulling the noise of those around me to a murmur. I can still hear conversations fairly clearly, but they're much, much quieter than they would otherwise be. Put on some music and use the foam tips and you'll be in your own little world.


Sound:

Tips: If you want to get the most out of the P4 Pro's conservative low end, be sure to use foam tips. They also smooth out the treble and mids some, making them sound a bit more refined. Extra isolation is a pleasant side effect. Silicone tips are brighter and more textured.

The P4 Pro's treble is slightly elevated with emphasis seemingly placed in the lower treble regions (maybe around 5k?). I found this placement to give the P4 Pro a very detailed, but not particularly fatiguing sound. Upper treble is lacking sparkle giving the P4 Pro a somewhat dry presentation. This also means they're not quite as airy as other earphones. Texture is excellent though, as apparent in Rage Against The Machine's “Bombtrack” where cymbals have depth and definition in places other earphones are splashy and uncontrolled.

The mid-range is the star of the show with a clear presence and natural tonality. Aesop Rock and Rob Sonic have similar rapping styles and voices (Rob is a bit higher pitched and more nasal), yet as they banter back and forth on “Dokken Rules (feat. Rob sonic)” they each sound quite distinctive. Guitars also sound right too, with tons of texture. Weighting and note solidity in general feels...right. Not too thin and analytic, but not overly thick and soft. When it comes to sibilance, the P4 Pro tip toes along a very fine edge without toppling over. This is the type of mid-range I would be plenty happy with were it more common.

The Knowles driver handling the low end does a good job, though I wouldn't say there is anything particularly noteworthy going on down there. It's typical BA performance showing decent extension on Kavinski's “Solli” with rapid decay and attack or more mid- and upper-bass frequencies, and quite a lot of texture all throughout. If you're used to dynamic drivers, these will probably sound a little anemic, even though it's still boosted slightly above neutral. I certainly wouldn't call them bassy. If you do find them lacking low end, toss on some foam tips and make sure you give yourself time to acclimatize. You might be surprised.

I found the P4 Pro's sound stage to be fairly average with greater depth than width. Thankfully, the outstanding imaging, layering and separation qualities keep each layer and instrument on a track individual. Even on Havok's most aggressive and congested tracks on their album 'Time is Up' the P4 Pro retains composure and keeps it clean.

Overall I find the P4 Pro's signature quite balanced and that it provides a very satisfying listen for someone wanting a neutral leaning sound, without going all-in on that style of tune. There's still some fun to be had in the bass and treble. My main complaint, which is more of an observation that really only crops up when comparing to other products, is that the drivers sound a mite unrefined and really aren't a step up from the those used in more budget oriented sets like the KZ BA10.


Select Comparisons (volumes matched with Dayton Audio iMM-6) :

KZ BA10 (75-100 USD): The BA10 with it's 5 BA setup, in my humble opinion, is an excellent sounding product that has been overlooked because of some questionable ergonomics. Fair enough, but when comparing to the P4 Pro which has been reviewing very well, it's easy to see that the BA10 swings up the price ladder. The BA10 has a slightly warmer presentation with smoother treble and mids, and a more impactful, aggressive low end. I found it's sound more refined in nearly every instance.

Bass is one of the more notable differences with the BA10 providing greater extension and visceral feedback. It's one of only a few BA-only iems that can handle “Solli” without feeling compromised in the low end. The mid-range isn't as forward as on the P4 Pro, nor is it quite as detailed, but it is smoother and strays further from dabbling with sibilance. Treble on the BA10 isn't as prominent. It also sounds like it starts to roll off a little more at the top but it is much less tiring despite seeming to have it's spike up at a higher frequency. It has a touch more sparkle but not quite the same level of clarity of the P4 Pro, nor is it quite as tight and well controlled. The BA10 sounds huge compared to the P4 Pro without giving up anything in terms of imaging quality. Layering and separation are pretty much on par too. I'd personally take the BA10 over the P4 Pro based on sound nearly every time because 1) it's low end is much more satisfying without ever being overbearing 2) it sounds like the more refined, expensive product 3) much better sound stage. That said, the BA10 has a more colored, further from neutral signature so I can see why others would prefer the P4 Pro.

Going back to the beginning of this comparo, the P4 Pro's fit is miles better. The BA10's design works, but it never feels secure since it's shape doesn't match that of any human ear. Build on the other hand is outstanding on the BA10. The all-aluminum shells are immaculately crafted. Still, the P4 Pro looks more subtle and professional compared to the BA10 with it's Iron Man color scheme. Cables? BA10's braided option looks better to me, has improved strain relief, and I find 2-pin connectors more reliable. It's also more flexible and less noisy. The P4 Pro's preformed ear guides win back a lot of respect, though I still think KZ does memory wire better than the vast majority of manufacturers so I don't mind it on the BA10.

Whizzer Haydn A15 Pro (124.90 USD): The A15 Pro's single dynamic has a warmer, smoother sound with a greater emphasis on upper mids and treble. I personally think the Haydn's bass presentation is quite sub-par, failing to evoke the qualities usually attributed dynamic driver; impact, weight, and physical presence. Its failing in these regards are apparent when a/b'ing with the P4 Pro which has a quicker decay and hits with more authority. A15 Pro only has the edge in extension. Mids are slightly thicker and more forward on the P4 Pro. A15 Pro sounds more open and spacious with a deeper, wider stage. P4 Pro's imaging is tighter and more accurate but the A15 Pro nearly matches it in layering and separation. P4 Pro is more crisp and detailed top to bottom. Primarily due to the low end presentation, I prefer the P4 Pro. The A15 Pro's low end is weedy and anemic, and completely unsatisfying.

The A15 Pro's well-machined metal shells evoke a great sense of quality and premium feel, though ergonomics go to the P4 Pro which fit my ears more naturally. Neither has a particularly nice cable, but the edge will go to the P4 Pro. 1) The A15 Pro's fabric section kinks easily. 2) The P4 Pro's MMCX connectors do not display the same intermittent connection issues, and do not detach during regular movement. The A15 Pro's packaging and accessories are more plentiful and of higher quality, save for the included carrying case. Tenhz's is essentially just a larger version of Whizzer's and uses nicer materials.

Kinera IDUN (139.00 USD): IDUN's hybrid setup has a notably more v-shaped signature with sharper, more shimmery treble and more thumpy, punchy bass. Mid-range de-emphasis definitely takes the attention off it when compared to the bass and treble, and listening to it back-to-back with the Tenhz. P4 Pro is a little more detailed, but not much, though low end texture is much better than on the IDUN. IDUN's vocals are set further back on the stage giving it a smaller presentation than the P4 Pro. P4 Pro's imaging, layering, and separation all feel more accurate and spacious. IDUN is slightly congested in comparison. I appreciate the extra bass of the IDUN's dynamic but overall prefer the sound of the P4 Pro.

I didn't receive any official packaging with the IDUN so I can't comment on that, but I will say that they go tit for tat on accessories. The IDUN's less generous tip set is of much higher quality being that they use Sony hybrids, or a nigh identical third party alternative. The IDUN's branded metal case is lovely and essentially the same thing you get with the 2000 USD HiFiMAN RE2000, but, I think Tenhz's leatherette case is just as nice and possibly even more premium looking. That said, you can't deny the extra protection a metal case gives over a semi-hard leatherette case. While they are similarly built, the P4 Pro's acrylic has a cloudiness to it not present in the IDUN, though you'd never really notice it unless setting them side-by-side. IDUN's braided cable is a masterpiece. 'Nough said.

Final Thoughts:

The Tenhz P4 Pro doesn't wow me like some other earphones, but I consider that a good thing. Products that blow me away out of the box tend to lose their luster quickly. Those like the Tenhz P4 Pro seem to just get better over time. It's consistent and reliable and doesn't do anything to turn me off when I just want to sit and listen to music, either as a primary focus or in the background.

The P4 Pro is nicely built, outputs a quality sound signature, is plenty comfortable, isolates well, and overall feels like a decent value, though the forgettable cable and generic tips pull from the presentation somewhat. Driver refinement is a touch behind that of similarly priced competition, but even so it doesn't really take away too much from the overall experience. This is a rock solid earphone in a competitive segment that shouldn't disappoint many, as long as you know what you're looking for. I have no issues recommending this one to someone wanting a neutral-leaning earphone with outstanding mids and an attractive but subtle design, one that doesn't cost a bundle. Well done Tenhz.

Thanks for reading!

- B9Scrambler


Some Test Tunes:

Aesop Rock – The Impossible Kid (Album)
Hail Mary Mallon – Are You Going to Eat That? (Album)
King Crimson – Lark’s Tongues in Aspic (Album)
King Crimson – Starless and Bible Black (Track)
Supertramp – Crime of the Century (Album)
Infected Mushroom – Legend of the Black Shawarma (Album)
Gorillaz – Plastic Beach (Album)
Massive Attack – Mezzanine (Album)
Fleetwood Mac – Rumors (Album)
Run the Jewels – Run the Jewels (Album)
The Prodigy – The Day is My Enemy (Album)
Tobacco – screw*d Up Friends (Album)
Felt – Felt 2 (A Tribute to Lisa Bonet) (Album)
Michael Jackson – Thriller (Album)
The Crystal Method – Grace (feat. LeAnn Rimes) (Track)
Jidenna – Long Live the Chief (Track)
Skrillex – Ragga Bomb (Track)
Big Grams – Run for Your Life (Track)
Funkadelic – Maggot Brain (Track)
Aesop Rock – Fishtales (Track)

TenHz is another one of these new Chinese companies I’ve never heard of before until I started hearing the hype of forums and then getting my own set of these to try out. From what I understand, they recently re-branded from another name, Audbos, who I admittedly had never head of before either.

Linsoul provided me the companies’ latest 4-BA IEM, the P4 Pro, for review purposes. As usual, no compensation was given to me for this review. They have been very good about allowing me full freedom to write honest and fair reviews during our partnership.

The P4 Pro Specs are as follows:
Drivers: 4 Balanced Armature (1xbass, 1xmids, 2xtreble)
Impedance: 26 Ohm
Sensitivity: 110 dB

With all that out of the way, let’s get to the details, shall we?





Presentation, Accessories, Build Quality, and Comfort

The P4 Pro comes in a large white box with a pull-out tray that displays all the accessories and the earphone itself. The presentation is clean and well put together. The first item in the box is a distinctively brown leather carrying case. I assume this case is made of PU Leather and not the real stuff, but it is a nice addition. It’s large enough to carry the IEMs with cable attached, as well as extra sets of tips and a small portable USB amp or Bluetooth adapter. In my case, I can easily fit the P4 Pro along with the Radsone ES100 bluetooth amp in this case, which makes a perfect portable solution.





Just below the case, is are the P4 Pro IEMs and two types of tips. The tip selection comes with standard silicone and memory foam tips, both of which coming in small, medium and large pairs.

Below this insert, you’ll find the silver mmcx cable. This cable is lightweight and very attractive. The IEM ends of the cable have molded hooks that do not contain memory wire, which to me, is a bonus. The cable is a bit springy and therefore does retain some of its coiled shape.

The P4 Pro I received has a black acrylic faceplate with the TenHz logo in a reflective silver on it. Behind the plate is a smoked translucent acrylic housing that reveals the internal components and wiring of the P4 Pro. Overall, the IEM is extremely lightweight due to lack of metals and other heavier materials, but the acrylic body feels well made and durable.

In actual use, the IEM is as lightweight feeling in my ears as they are in my hands. The comfort level of the shape and design is excellent, fitting perfectly into my ear shape without any discomfort over long listening sessions. This is actually one of the most comfortable earphones I think I’ve ever worn. The seal is also excellent.




With the stock ear tips, the actual seal was too much. With them on, I could not hear anything in my surroundings. When I was chewing on food while listening to it, my music would be interrupted with every bite or chew. I was cleaning the dishes, when my fiancée came by and tapped my shoulder and it scared the heck out of me because I didn’t expect her coming. That’s about how good the seal was for me, and I actually didn’t like it for those flaws.

I ended up switching to SpinFit C155 tips and have found them to give a good proper seal, while not hearing every little bite I make or any noise in the cable – no microphonic issues. The remainder of my review will be covered using those specific tips.

Sound

The P4 Pro advertises itself as “completely transparent headphones” on its box and for the most part, I agree with this sentiment. The headphone is probably best described as a tame, neutral sound. I call it tame because it doesn’t accentuate any specific area, and is generally a smooth sounding ear phone. There are no significant peaks in the treble to worry about and the bass is relatively linear but does roll off a little more than some competing BA IEMs in sub-bass region, with less low-end rumble around 45Hz and below than others.

During my time with the P4 Pro leading up to this review, I used the the P4 Pro with the C155 Spinfit tips, along with balanced 2.5mm cables. My primary source was the Pioneer XDP-300R Digital Audio Player, however I also spent some time using it with the Topping DX7 DAC/Amp and the Monolith x Cavalli Liquid Spark amp.





My music selection for this review consisted of tracks from the following records:

The Roots – Phrenology and The Tipping Point
Tegan and Sara - Heart Break
Vince Guaraldi – Live Recordings
Olafur Arnalds – Re:member
Radiohead – OK Computer
Real Estate – Atlas
Common – Be
Chris Stapleton – Traveler

Bass
The bass is lean, and slight but very clean. It does get audibly quieter in the sub-bass region, so those expecting a bit of a rumble may be disappointed. Instead, the bass does provide good detail and does not ever muddy up the lower-mids and provide any bloat.

On hip hop songs like the popular Seed 2.0 from The Roots or the trip hop classic Unfinished Symphony by Massive Attack – the bass doesn’t have the slam and emphasis I’d expect and enjoy, and may sound light and lacking. On jazz songs where the acoustic bass is highly prevalent, the instrument is detailed and easily discernable, though lacking some oomph that some tracks need to carry the song.
When the volume is raised, the bass slam comes back, but other issues arise, which I will discuss more later.

Mids
The mids are very smooth on the P4 Pro. They have a small dip around 600-800Hz in the lower mids but quickly rises again in 1-2KHz range where vocals are very important. I never have any sense of shoutiness based on this and I find vocals to sound natural though with a slightly nasal sheen to it. Overall though, the mids are very coherent and transition very smoothly into the treble.

Treble
On my initial listen with the stock tips, I found the treble to be a bit harsh, but I was also coming directly from the Campfire Comet which doesn’t excel in its treble response. After listening for a little more time and switching tips, I found that the P4 Pro’s treble to be actually tame yet full of detail and air. It does lack some zing and sparkle compared to some other headphones and earphones that have more boosts in this region, but I do not find the P4 Pro lacking at all. It actually provides a very listenable experience that will not become fatiguing in long listening sessions.

Soundstage/Imaging
The P4 Pro does imaging from left to right very well. Depth and height separation are average, while the soundstage is also medium in width. It is not as wide as the recently popular BGVP DMG, but not as intimate as the Campfire Comet.




Power Handling/EQ
One of the things I noticed in this IEM is that it is sensitive to both volume and equalizer changes. This IEM works very well at lower to medium volumes, but once you increase power and add more gain, the P4 Pro starts to become less coherent and grainy.

Slight adjustments to EQ seem to also impact the quality as well. Adjusting frequencies in bass and lower mids quickly muddies up songs and makes them sound bloated. Some people may like the snap changes that the EQ makes – it is very easily distinguishable when a small boost is made, however, for me, subtle changes is usually all I am looking and distortion is not.

For reference, I have tried equalizing the IEMs using Equalizer APO on PC and using the built-in equalizer in the Pioneer XDP-300R, and both have similar sensitivity effects on the P4 Pro. That said, I do not believe the IEM requires much adjustment at all.

This may be explained by looking at the distortion numbers measured by MiniDSP. They are a bit higher than expected across the board. The box even displays a 2% THD value so take that into consideration.




Comparisons
Two IEMs I will write a quick comparison to are the similarly priced BGVP DMG and the slightly higher priced Campfire Comets.



BGVP DMG
The BGVP DMG has an aluminum metal housing that is well designed and simple, compared to the acrylic lighter weight design of the P4 Pro. Both are extremely comfortable to wear for long periods of time.

The DMG offers a more V-shaped sound signature that has recessed mids but more emphasis in bass and treble. That does give more of that bass presence to songs that need it and gives the upper end more energy and spark. Sometimes that does make the mids a little less coherent overall than the P4 Pro though. The P4 Pro is generally more coherent and smooth sounding, and still provides great detail, though will sound leaner in comparison. The DMG gets better with volume gain, while the P4 Pro is the complete opposite.




Campfire Comet
The Comet is the entry level offering from Portland-based Campfire Audio. They feature stainless steel shells that are intricately designed with a reflective finish that is prone to fingerprints. The shape and design is tiny in comparison and can be worn either up or down, while the P4 Pro must be worn over-ears.

While I mentioned in the main review that the P4 Pro sounds a little tame, the Comets sound even tamer. The Comet has a much more fuller body sound to it with a warm, intimate presentation, whereas the P4 Pro has more extension on both ends of the spectrum but will sound leaner and more neutral in comparison.






Overall
The TenHz P4 Pro is a very solid contender in the ever-growing IEM market. It’s one of those ear phones that really makes you appreciate how fast the advancement of low cost, high quality sounding headphones is becoming. Not too long ago, a 4-BA driver IEM was going to cost you at least $100 per BA, and now you can get 4 quality ones for $150 or less.

The P4 Pro does sound like that magical Frequency Response displayed on the back of its box, where it is close to neutral. It offers a good lean sound that is highly detailed at its price point, and will provide a good IEM for long, lengthy listening sessions without any sonic fatigue or physical ear fatigue, at least for me, as long as you like listening at lower volumes.

When volume is raised, or when EQ is used, things can start to sound a little distorted quickly. I do not recommend this IEM if you plan to use extensive EQ or like listening to music loud. If this isn’t you, then you may find this a very good value. The additional accessories are very nice quality and add to the value of this IEM.

Credits/Disclaimers
As mentioned above, the P4 Pro by TenHz was provided to me by Linsoul for review purposes with the expectation that I provide an unbiased and honest review of the headphone. If you are interested in this headphone please check out the links below:

Amazon:
https://smile.amazon.com/TENHZ-P4-PRO-Balanced-Detachable/dp/B07HLZW5NM

Ali Express:
https://www.aliexpress.com/item/TENHZ-P4-PRO-4BA-Balanced-Armature-HIFI-In-Ear-Earphone-In-Ear-Monitor-with-MMCX-Detachable/32932428994.html


Measurement Disclaimers
The measurements in this review were taken from the MiniDSP EARS measurement rig. This rig is not an industry standard method for measuring however it is very useful as a comparison tool with other headphones measured on the same rig. Compensation curves, if used, are supplied directly from MiniDSP. IEMs use a Diffuse Field correction which is based off of measurements from the Etymotics ER4 IEM.