I have just bought a Musical Fidelity A3.2 amp to use with my Yamaha E800. I connect the CD and Tuner to the MF amp for best sound quality, but want to be able to use the subwoofer connected to the E800. So I connected the Tape out of the MF to the CD in on the E800 and when both are switched on the subwoofer operates as expected. However when the E800 is on standby the CD sound quality sounds awful - worse than "boom-box". Switching the E800 on, even with an unconnected input selected cuts the interference sound. The E800 is obviously connected to the MF for front channel sound. This puzzles me because it should be no different than connecting a tape recorder which may be switched off. My subwoofer only has 1 line level input so can't be connected direct to the amp.