Recent change to my desktop computer sound system; Removed a set of B&W MM1's and replaced them with an amp, DAC and DefTech Studio Monitor 55's. AudioEngine D1 dac connected via usb to iMac. Niles SI-2100 amp connected to D1 via RCA cable. speakers connected to amp via 14awg wires. Sounds good. Have noticed when not playing music and amp or D1 is on, a very slight rumble is heard even if volume control is at lowest setting on the DAC..I'm wondering if it's cables or....?
