I am experiencing some problems with my new setup, which is a O2+ODAC Combo running from a Windows desktop to a pair of Ultrasone Pro2900s. I have the amp/Dac plugged directly into a wall socket with the Australian power adaptor and USB cable supplied by JDS Labs. The USB cable runs into a USB 3.0 port on the rear of the desktop.
My issue is that the sound is very one dimensional and unexceptional, even connecting the headphones directly into my phone produces much better results.
Does anyone have any troubleshooting tips?