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Astell&Kern T9iE In-Ear Monitors by Beyerdynamic

The Astell&Kern T9ie is their latest collaboration with Beyerdynamic, featuring a beautiful new finish on the earpieces and an upgraded balanced cable with single-ended adapter.

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Our Take

This in-ear monitor is a perfect companion to any of the line of Astell&Kern DAPs, pair it with the SE100 or KANN Cube for a cooler, neutral sound, or with the SP2000 or SP1000m for a warmer tone.


beyerdynamic + Astell&Kern

Astell&Kern is proud to announce the all-new AK T9iE.

The AK T9iE is the third in-ear collaboration product by beyerdynamic and Astell&Kern.

Specially tuned for Astell&Kern portable music players, the AK T9iE has an extremely neutral sound signature with soft treble, linear midrange and slightly elevated bass.

The AK T9iE uses beyerdynamic's patented high-efficiency Tesla Technology and is manufactured by hand in Germany, satisfying the highest standards.

Acoustic sound signature of AK T9iE

Our target is to make the sound more natural, especially when playing back hi-res audio with Astell&Kern Players. The newly designed acoustic vent port allows for improved bass response and enhanced treble softness by specially engineered two-layer acoustic filter with integral earwax protection.

New acoustic vent port

The newly designed acoustic vent port has a slightly enlarged vent hole that is located in the middle of the cover plate which allows for a very deep bass that is extremely well controlled.

Two-layer acoustic filter

A specially engineered two-layer acoustic filter is utilized in the sound outlet, different from the AK T8iE MKII, and serves two purposes - protection from earwax and an acoustic filter element which produces very pure and neutral treble.

4N pure silver and 7N OCC copper hybrid 2.5mm 4-pole cable

The same cable used for AK T5p 2nd Generation has been utilized for AK T9iE.

It's made with 4N pure silver with silver plated 7N OCC to deliver the high in this combination; and the 7N OCC to bring the low.

This hybrid construction of pure silver, silver OCC and OCC litz creates a unique harmony.

No more sharp highs or too much bass: bring perfect balance to your music with this unique cable.


  • Model: AK T9 iE
  • Transducer type: dynamic, moving-coil
  • Operating principle: closed
  • Frequency response: 8 – 48,000 Hz
  • Impedance: 16 ohm
  • Total harmonic distortion: <0.2 %
  • Power handling capacity: 10 mW
  • Sound coupling to the ear: intra-aural
  • Cable: 4N pure silver and 7N OCC copper hybrid 2.5mm 4-pole cable

About Astell&Kern

Astell&Kern is the group responsible for some of the world's best portable music players. The latest models include a full slate of features such as Bluetooth and Wi-Fi playback with Spotify, Tidal, and Qobuz.