ACZ KR06-6 – Review

ACZ KR06-6

ACZ KR06-6

| 2 Balanced Armatures | Dynamic Driver |

? ACZ KR06-6, a triple hybrid driver headphone from ACZ.

We got the ACZ KR06-6 without much information about the brand, in fact this is the first time that we ever heard about the brand but the advanced configuration and friendly price made us take the risk.

The ACZ KR06-6 features 2 balanced armatures, 1 dynamic driver, detachable MMCX cables and braided cables.

The ACZ KR06-6 are triple driver earphones, configuration similar to other very popular and well-performing models such as:

You can buy the ACZ KR06-6 in:

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ACZ KR06-6 Review

Tests & Scores



ACZ KR06-6 weight in Ounces and ACZ KR06-6 weight in grams.

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Accessories & Packaging

The ACZ KR06-6 unboxing results in 3 pair of eartips and a semi-hard carrying case. Everything is packed inside a simple and small cardboard box.



Bass & Sub Bass

The ACZ KR06-6 bass offers punch to cover many genres but does not get very deep. The ACZ KR06 provide enough mid-bass to not sound “bassless” but might sound a bit dry to some. To their benefit, they will welcome listeners with bass response that is not invasive and that leaves space for mids and highs without interfering.

Applying an EQ can be useful to add depth and some extra punch to their bass. The additional depth is noticeable, still do not expect a bassy makeover.

During our extreme bass tests the ACZ KR06-6 were able to handle 32% of the maximum power of a Fiio E12 amplifier while being set to high gain and with bass boost turned on; a custom basshead EQ was used.

This amplification and equalization gave the ACZ KR06-6 an important increment of mid-bass punch and sub-bass depth but were miles away from the baseline level of the KZ ATE, Xiaomi Mi Pro HD or  the Monoprice 8320Elecom EHP-CA3580, Xiaomi Mi In-Ear Headphones Pro or the Sony MDR-EX650, Pioneer SE-CX7 and Pioneer SE-CX8.


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Mids & Vocals

The ACZ KR06-6 mids present nearly zero mid-bass bleed, lower mids do not sound congested at all. Instead, their mids are clear from lower mids up to upper mids but lower vocals can sound a bit overpowered by their highs. Higher mids usually do not get too harsh unless their peaks are very near to highs/treble ranges.

An EQ can spice up their vocals gaining much more presence in the sound signature. If wanted, their mids can also be slightly warmed up by a custom EQ. No harshness is added to their higher mids.


ACZ KR06-6
ACZ KR06-6


Highs & Treble

The ACZ KR06-6 highs are crazy bright and resolve some detail, something that tends a bit to a Senfer 4in1 and Senfer EN900 style.

As usually, this highs-emphasized tuning can lead to some piercing highs and/or sibilance. In the specific case of the ACZ KR06, the most noticeable peaks are perceived with sibilance.

The ACZ KR06 are certainly not for treble sensitive people but for “trebleheads” or people enjoying very bright highs.

An EQ makes their highs monumentally bright but please beware to tune up only frequencies above 6.5kHz or you will be overpowering their 5kHz peak. Of course, an EQ to boost highs will feed up their sibilance.




Sound Leak

The sounds that leaks out of the ACZ KR06-6 will be hearable in less noisy situations and when you crank up the volume. In normally noisy environments and while choosing a moderate volume setting, they will blend in.


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Sound Isolation

Noise isolation of the ACZ KR06 is slightly less efficient than most average earphones – not by a big margin, though. What you should expect is partial isolation when listening to music at low volume settings and much stronger when dialing up over moderate levels.


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The ACZ KR06-6 have particularly light earpieces, this gives them a good starting point regarding comfort but they also have some pointy edges and deep nozzles that could add some discomfort to people with small ears – this will depend on each one and their ears size/shape.


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Response to Equalization

The response to EQ of the ACZ KR06-6 was very efficient regarding brightness and vocals and less drastic with lower frequencies.


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Scores Scores

ACZ KR06-6 Scores

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Frequency Response (raw)

ACZ KR06-6 Frequency Response Curve

ACZ KR06-6 Frequency Response Curve
ACZ KR06-6 Frequency Response Curve

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ACZ KR06-6 Technical Specifications

TypeDynamic / Hybrid
Driver Unit2xBA + DD
Power CapacityN/A
Impedance8 ohm
Frequency Response20-40,000Hz
CordY-type, round cord
Cord Length1.2m
PlugStereo mini plug
WeightApprox. 8g
Supplied Accessories3x Earphone tips; MMCX cable

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How many drivers does the ACZ KR06-6 have?

The ACZ KR06-6 is a triple driver headphone. Which means that the ACZ KR06-6 has 3 drivers per side.

What type of headphone is the ACZ KR06-6?

The ACZ KR06-6 is an in-ear headphone.

Does the ACZ KR06-6 have a microphone?

The ACZ KR06-6 have a microphone and a remote.

Which ACZ KR06-6 colors are available?

The colors available for the ACZ KR06-6 are: blue & red.

What is the price of the ACZ KR06-6?

You can check the most up-to-date price of the ACZ KR06-6 by following THIS LINK.

Where can I buy the ACZ KR06-6?

You can buy the ACZ KR06-6 HERE

How many eartips does the ACZ KR06-6 include?

The ACZ KR06-6 includes 3 pair of eartips.

What cable do the ACZ KR06-6 have?

The ACZ KR06-6 have a detachable, Y-type, braided cable.

What cable connection does the ACZ KR06-6 have?

The ACZ KR06-6 cable connection has a MMCX interface with a 3.5mm mini stereo plug.

Are there replacement cables for the ACZ KR06-6 ?

The ACZ KR06-6 cables can be replaced with compatible MMCX replacement cables.

Are there upgrade cables for the ACZ KR06-6 ?

The ACZ KR06-6 uses MMCX cables which are very popular standard cables. You can buy any cable with an MMCX connector to upgrade the cable.

Does the ACZ KR06-6 have Bluetooth / The ACZ KR06-6 is a wireless headphone?

The ACZ KR06-6 does not have Bluetooth but you can buy MMCX Bluetooth cables to make the ACZ KR06-6 Bluetooth-enabled headphones.

Is the ACZ KR06-6 compatible with Apple devices?

The ACZ KR06-6 is fully compatible with Apple devices.

Is the ACZ KR06-6 compatible with Android devices?

The ACZ KR06-6 is fully compatible with Android devices.


ACZ KR06-6 Photos

We highly discourage anyone from trying to apply our testings to your own earphones, the risk of damaging or permanently breaking your iems is absolutely probable to happen. With our standardized equalization and amplification tests we push the limits of the earphones to the extreme. If anyway you decide to do so, we cannot be held responsible of the damage done to your equipment. Do it at your own risk.

ACZ KR06-6