I use the USB Xfi for taking REW readings with my laptop, the prechecks(zeroing) on the sound card with REW show it is one very stable and flat DAC. It only dips at about 5hz then is flat through to and past 20khz, perfect for music.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70