The AK T9iE is the new joint venture between Astell & Kern and the high-end headphone manufacturer beyerdynamic. The further development of the two Tesla In-Ears AK T8iE and Xelento, the AK T9iE is the next level. With the new acoustic design, the Tesla drivers play even cleaner, more musical and less stressful. Ergonomics and comfort were already sensational. Plus the new symmetrical 2,5mm silver-copper high-end cable from AK. Chapeau!
Directly from Astell & Kern authorized distributor, the Headphone Company!