audio-sound @ hatena

An audio review & news blog. The volume should not exceed 80 dB is recommended. I usually adhere to the safe-listening style by WHO. Please note that my aural impressions and interpretations of measurements are also made from a safe-listening style.

(News) KZ AST Latest 24BA Driver IEM Released




Knowledge Zenith Acoustics commonly known as KZ Acoustics among the audiophiles have just dropped their latest pair of high-resolution In-Ear Monitors, the KZ AST. KZ this time has equipped its latest pair with a whooping 24 high-performance Balanced Armature drivers(12 on each side) tuned by professional audio engineers to create a professional listening experience for its users. The pair is said to have a smooth, high-detailed sound output with rich vocal clarity and smooth high-frequency response. It looks like an upgraded model for their previous 20BA driver KZ ASX earphones that was released last year. KZ AST is available to purchase starting at just 138$ for the non-mic variant.





  • Twelve High-performance BA drivers on each side.
  • 3D-Printed Balanced Armature Sound Cavity with Leading Acoustic Tube Design.
  • High-Purity Silver-Plated Cable.
  • Ultra-Low Distortion With Professional Electronics Crossover.
  • Exquisite Build With Rigorous Quality Control.
  • Premium Zinc Alloy Face Panels.
  • Comfortable Firm Fit.
  • HD Microphone(In-Line Mic Variant).
  • Easy To Power.
  • Impedance: 30 ohms.
  • Frequency Response Range: 10Hz-40kHz.
  • Sensitivity: 103dB.
  • 2-Pin 0.75mm Connectors.




Huge Driver Configuration

KZ has equipped the AST with 12 high-performance balanced armature drivers on each side, totaling to 24 BA drivers producing a high-resolution sound experience for its users. All these drivers are the latest generation BA units providing excellent dynamics and characteristics to the output. The pair features multiple units of 30017s, 30095s, 30019s, 29689s, and 22955s Balanced Armature drivers.


High-Frequency Matrix BA Combination

KZ AST features a high-frequency matrix BA combination designed and developed independently to provide a smooth, non-fatiguing, and highly detailed high-frequency response.




3D Printed Acoustic Tube Cavity

KZ has designed the AST with a 3D-printed acoustic tube cavity for multiple BA drivers. It helps in easier placement of the drivers inside the shells and also helps in reducing distortion in the output with an acoustic tube design.


Professional Designed Electronic Crossover

KZ AST features a professionally designed electronic crossover tuning each driver to respond to a particular frequency range. This results in ultra-low distortion in the output with a high level of detail retrieval and each driver achieving its best performance.




Exquisite Build With Rigorous Quality Control

The earpieces in KZ AST have rich and premium looks thanks to polished five-axis CNC machined Zinc Alloy face covers. The pair is made with utmost precision and craftsmanship. KZ AST is available in three different colors, Green, Black, and Silver.


High-Purity Silver-Plated Cable

KZ AST comes bundled with a high-purity silver-plated earphone cable with 0.75mm 2-pin connectors. 4 Strands of 200-core high-purity material retains the sound with subtle changes.


Pricing & Availability

KZ AST is available to purchase from our store starting at 138$ for the non-Mic variant. Check out more details here.