It looks a little bigger than most of the other Pro-Ject 'Box Design' items, and the efficiency is properly substantial. The Head Box DS earphone amp with integrated DAC from Pro-Ject is a completely new design that provides uncompromising sound quality. It's tailor made for computers and other digital sources, however it stands out with analog sources, too.
1x analogue output (use unit as D/A converter) ; 1x analogue input ; 1x USB input (24bit/96 kHz asyn
1x digital coax input ; 1x digital optic input ; 1x 6,3mm headphone output
Big elegant control display ; Ultra low-noise semiconductors from Burr-Brown
SMD technology for short signal paths ; Signal to noice ratio -120dB
THD < 0.0014%