I have a Musical Fidelity A3.2 amp which is used as the front channels in a suround setup in conjuction with a Denon AVR2802. The problem is that when I select Aux2 on the MF, which is the processor loop, I get a buzzing through the front L & R speakers. Anybody know what could be causing this please? The amp and receiver are connected with Van Den Hul interconnects, and I use QED SA Bi-wire for the speakers. Any help much appreciated.