The DAC part: PCM2906, to convert USB into a S/PDIF digital stream. (It also has the DAC function, but not good enough) CS8416, DA-revevier chip CS4398, D/A chip, one of Curris Logic&squot;s Flagship Chips.
The AMP part: OP+BUF structure, AD823+BUF.
Buildin 2A rechargeable Li-ion battery*2. PLay Time: up to 60 hours. Dimension, 78*32*120mm It has USB, optical, coaxial, and stereo input, stereo output. So, it also can work as a dedicated AMP or dedicated DAC, or external USB soundcard. -----------------------------------------------------------