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News - New IEM launches (KZ, HiBy & Fidue)

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This news article is published with permission by HifiGo, to find out more, please visit the original articles linked under each product. Acho Reviews is in no way affiliated with HifiGo or any other manufacturer/store. For more information, please see the FAQ

Over the past 10 days there have been a few new set of IEMs launched, in multiple price brackets.

For those interested in the budget end of the market, something that I like to focus on, there is a new launch from the well known players of the economic IEM market, KZ.


A couple of days ago, KZ launched the new ZAS, a 8 driver per side hybrid from the brand who popularized hybrids in the budget IEM market.

With the ZAS, they have opted for a single dynamic driver paired with 7 balanced armature drivers, in a shell that contains a new acoustic cavity structure according to KZ.


- 8 driver per side, hybrid configuration.

- 10mm Dual-magnetic Dynamic Driver.

- 7 new-generation high-performance Balanced Armature drivers.

- Newly designed Acoustic Cavity.

- Professional electronic frequency crossover.

- High-purity 200 core silver-plated cable.

- Standard 0.75mm two-pin connectors.

- Standard 3.5mm termination plug.

- Impedance: 24 ohms.

- Frequency Response Range: 10Hz-40kHz.

- Sensitivity: 109dB.

Price and availability…

The ZAS is available in two colours from $66 (for the non mic version) on HifiGo, here.

Read more about the ZAS in the orginal article here.

HiBy Crystal 4

Moving slightly up in the price bracket we have a new set of multi balanced armature IEMs from HiBy called the Crystal 4.

Using Knowles BA drivers, HiBy has opted for 4 drivers per side, as the name would suggest. There is a 22955 driver used for the low end, a 29689 driver for the mids and 2x 31736 drivers working together in the high end. 


- Knowles Quad-BA driver configuration.

- Handcrafted Inner Cavities.

- 0.78mm 2-pin connectors.

- Silver-Plated Copper cable With 3.5mm Termination Plug.

- Impedance: 26 ohms.

- Frequency Response Range: 20Hz-40kHz.

- Sensitivity: 105dB/mW.

- Two-Way Frequency Crossover.

Pricing and availability…

The HiBy Crystal 4 is available on Hifigo for $299.99, here.

Read more about the Crystal 4 in the original article here.

Fidue Gem 4

The last IEM of the three that I will name today is also the highest priced of the 3. The Fidue Gem 4 also opts for 4 Balanced armature drivers per side, although they note them, in this case, as custom tuned units.


- High-Performance 4x custom made BA drivers on each side.

- Three-way electronic frequency division.

- Independent Acoustic Cavity.

- Independent Air-Diversion A.G. module.

- High-purity Silver-plated Monocrystalline Copper cable.

- Standard 2-pin connectors.

- Medical-grade Resin shells made using 3D printing technology.

- Impedance: 50 ohms.

- Sensitivity: 112dB.

- Input Power: 50mW.

Pricing and availability…

The Fidue Gem 4 is available on Hifigo for $479.99, here.

Read more about the Gem 4 in the original article here.


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