TenHz P4 Pro IEM Review – Equilibrium

TenHz P4 Pro feat
Tested at $150

Hey there fam. Today we’re checking out an earphone from a manufacturer formerly known as Audbos, the TenHz P4 Pro. This IEM has 4 balanced armature drivers per side, sounds excellent and is one of the most comfortable earphones I’ve ever used. Shall we proceed?

  • Good carrying case included
  • Excellent build quality and comfort
  • Clarity and balanced signature
  • Cable is a bit stiff

Buy on:

Linsoul Audio

  • Color: Black
  • Driver unit: 4 balanced armatures
  • Frequency response range: 10 Hz–40 kHz
  • Sensitivity: 110 dB +/- 2 dB
  • Impedance: 26 ohms
  • Connectors: 3.5 mm
  • Cable length: 1.2 m

This sample was provided for the purpose of an honest review. All observations and opinions here are my own based on my experience with the product.

Package and Accessories

The P4 Pro comes in a white box that has a colour image of the IEM on the front. Over on the back are the specifications, a fairly detailed description of the earphones and a frequency response graph.

Opening up the box reveals the beautiful faux leather carrying case that is provided. The case has a magnetic seal and a small metal plaque with the brand name and logo on it. This is a superb case and is a little bit larger than average. Sure, it does mean it isn’t really pocket friendly but there’s ample room to fit the IEMs without having to stuff them in like you have to do with smaller cases.

Right next to the carrying case are the earphones and eartips seated in a foam insert. Underneath the foam, you’ll find the cable. Let’s take a look at all the contents:

  • TenHz P4 Pro earphones
  • MMCX cable
  • 3 pairs of silicone eartips (S, M, L)
  • 3 pairs of foam eartips (S, M, L)
  • Faux leather carrying case
  • User manual/warranty card

This is a great bundle for something in this price range. Everything included is useful and practical and the great carrying case really adds a touch of premium to it all.

Build Quality and Design

Sporting a 3D-printed resin housing, the TenHz P4 Pro is a beautifully crafted IEM. It can match anything in this price range when it comes to build quality and looks.

The shells are very smooth all over and the transparent resin allows you to see the balanced armature drivers within. The black faceplates have a silver TenHz logo and are joined seamlessly to the shells.

Being a multi-BA driven earphone, the P4 Pro does not require any venting so there are no ports anywhere. The nozzles have a ridge on the end to hold eartips securely and the usual mesh cover is there too to prevent ear wax and other debris from penetrating the housings.


While the provided cable is of good quality, it’s not the most aesthetically pleasing you will see for something in this price range. Its twisted strands are covered by a single transparent sheath which looks quite nice but is a bit stiff and bouncy.

At the top are some transparent MMCX connectors and heat-shrunk pre-formed ear guides. There is a small, cylindrical, metal Y-split that is small and unobtrusive. The cable terminates in a small, straight 3.5 mm plug.

TenHz P4 Pro cable
Comfort and Noise Isolation

The TenHz P4 Pro is an exceptionally comfortable earphone. Its housings just melts into your ears and you can easily forget that they’re there. The resin shells are silky smooth and contoured to fit naturally into the outer ear.

Noise isolation is above average. This all BA earphone is not vented so you’ve basically got a solid piece of resin filling the ear’s conchae. Even with the volume down low, you’ll hear very little outside noise while there’s music playing. Similarly, the noise leak is practically non-existent. You can wear the P4 pro anywhere (unless you need to hear the outside world!)


Gear used for testing includes the Shanling M0 and Acoustic Research AR-M20 DAPs. On the desktop, I was running JRiver Media Center from my PC to the FiiO K3 DAC.

The P4 Pro is super easy to drive and gets plenty loud from any source, including my Android phone

Text on the box describes the sound of the TenHz P4 Pro as being transparent and I agree with that statement. It has a balanced presentation and doesn’t emphasize any particular frequency over the others. The sound is detailed and clean with a touch of warmth.


The bass is fairly light with a slight emphasis on the mid and upper-mid bass. Its sub-bass extends well well but the level is very conservative so don’t be expecting any earth-shaking rumble. Instead, you get accurate tonality, tight control and texture.

Attack and decay are both slightly slower which give bass notes a fullness and some extra body. I found the P4 Pro’s bass to be suitable for all genres but it’s definitely not an IEM for bassheads.


The P4’s midrange is simply delightful. It’s smooth and has great articulation at the same time. Vocals have a nice density which makes them sound solid but not uncomfortably intimate. Acoustic and electric guitars sound great on this IEM and are loaded with texture.

Male and female vocals both sound very natural and accurate. The P4 Pro’s balanced presentation really gives the mids all the room they need to shine.


Continuing with its balanced presentation, the P4 Pro’s treble is neither recessed nor forward. There are no nasty peaks or harshness present and there is no sibilance either.

The treble extension is reasonable and note timbre is good. It’s crisp, lively and light and has enough presence to reveal detail but at no time does it become too aggressive either.


The stage is well-defined and average in size. There is a greater sense of depth than width or height. What the stage lacks in size it makes up for with very good instrument separation and black background.

TenHz P4 Pro with case


TenHz P4 Pro vs BGVP DMG ($139 USD)

The most notable difference between these 2 earphones is undoubtedly the bass. The DMG (review here) has a healthy boost of bass and a powerful sub-bass rumble. The P4 Pro bass is much more neutral but it is also more textured and layered.

The DMG’s midrange is more recessed but it’s similar in tonality to the P4 Pro apart from some extra warmth in the lower midrange as a result of the more aggressive bass.

There’s a little more air and slightly better decay in the DMG treble which gives it a larger soundstage. In contrast, the P4 Pro has more solidity in the treble where the DMG sounds more diffuse.

When it comes to build and comfort these are both really good. However, I would give the P4 Pro a slight edge in comfort as it feels more natural in my ears. The build quality is equally as good on both IEMs but the DMG definitely has the nicer cable.

TenHz P4 Pro vs Hifi Boy OS V3 ($159 USD)

The OS V3’s bass carries more weight, most notably in the sub-bass. Mid-bass is punchier on the P4 Pro but doesn’t have the same impact as the OS V3’s dynamic bass driver.

Female vocals are a bit more vibrant on the P4 Pro as the OS V3 has a similarly forward but warmer midrange. The P4 Pro is more resolving in the midrange with the OS V3 sounding more earthy and rich.

The OS V3 treble is smoother and has better extension. It has an airier sound than the P4 Pro which opens up the soundstage a bit more, making it feel wider and deeper. These 2 earphones have an almost identical shape so the comfort is equally good on both, as is the build quality.

Whizzer A-HE03 ($155 USD)

The A-HE03 has a much more analogue sound and is significantly less resolving. In many ways, it sounds more like a single dynamic IEM than a hybrid.

Sub-bass on the Whizzer is huge compared to the P4 Pro. The bass on the A-HE03 is less defined and textured in general. One thing the Whizzer has in spades is cohesion although on some occasions the sub-bass does get out of hand.

In the midrange, the P4 Pro has more clarity and better separation. The Whizzer, on the other hand, does at times become a wall of sound, particularly if a track has a lot of bass action below 60Hz.

There’s better extension in the Whizzer’s treble but it’s more conservative and sits further back than the P4 Pro. Both earphones have a similar treble quality but the A-HE04 treble sounds more laid back because of the weighty bass response.

Comfort is superior on the P4 Pro and it feels more natural in my ears. When it comes to build quality these are both great – metal housings on the Whizzer vs the resin of the TenHz P4 Pro, although the Whizzer’s cable is definitely superior.

TenHz P4 Pro comparisons
From left to right: Whizzer A-HE01, TenHz P4 Pro, Hifi Boy OS V3 and BGVP DMG.


The TenHz P4 Pro was a bit of a surprise for me. As I had never tried any Audbos products I didn’t really know what to expect. Seeing the refinement in the build quality and sound presentation shows the new company’s previous experience coming through.

This is a resolving and very capable IEM that I feel is well worth the asking price. It’s got a well-rounded accessory set, although the stock cable is a little disappointing.

If you’re looking for a multi-BA IEM to compliment your existing collection this is definitely one to consider, especially if you are after something less V-shaped and more linear.

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