Had a mooch around and can't find anything relevant.... Anyone got a AudioQuest Forest Digital Coaxial 1.5m cable? Just bought one for my Ultra and vibelink amp, no sound from main speakers... I've plugged the cable in to the single RCA next to trigger wire, plugged into the amp and set the output to coaxial... I get nothing from the main speakers, just hear the sub thudding away. Anyone got any suggestions?