Hi guys,
Wonder, has anyone experienced humming noise from USB/Firewire? This noise is there even when the DAC is not even on. It's very pronounced for low impedance headphones (~32 ohms). Unplugged these wires and the noise was gone. I use Pangea silver core USB wire and can't imagine it's badly shielded. My 192 has f/w 1.7.5, usb driver 1.34.10, and firewire driver 4.1.3.
Currently, I used optical to eliminate the noise but can't do DSD. Any help would be great!