Hi all, My recently acquired 2nd-hand Denon AVC-A1D amp is playing up. It has worked flawlessly for about 2 weeks, but for the past few days the right-rear channel has been "crackling" randomly. I can't find a pattern: it works fine for a while, starts crackling for anything from a couple to 30 or more seconds, then stops (then starts again whenever). This happens whether I'm using the digital or analog input, when using a multi-channel mode (including DD and DTS). Varying the volume does not seem to increase/decrease the crackling Turning the volume all the way down does not stop it, but muting does. That would tend to point towards a post-amplification problem, right? I have switched the L/R speakers, then the cable, but the problem persists. I'd appreciate any suggestion.