ESI Dr. DAC prime High Quality USB DAC

Dr. DAC prime simply has everything you need in order to listen to digital music with pristine audio quality on the road or at your home.
Dr. DAC prime works with up to 24bit/192kHz and is not only equipped with both an optical (via the included mini plug-toslink adapter) and coaxial S/PDIF input but also with a full USB audio interface (up to 24bit/96kHz) for bit-perfect audio transfer. Optionally the incoming signal can be up sampled to 192kHz, using a TI SRC4382 high-end sample rate converter.
The actual analog output signal is generated by a TI PCM1796 DAC with 123dB(a) dynamic range, featuring a full differential output with 3 LME49860NA op amps (8 pin), which are conveniently placed on sockets. The built-in headphone amplifier provides 1/8" and 1/4" connectors. The line output volume can be adjusted or fixed to send out the maximum dynamic range.
Dr. DAC prime works under Windows XP, Windows Vista, Windows 7 as well as Mac OS X even without the installation of any driver software - that's Plug & Play in perfection, it could not be simpler.