Just bought one of these beasties, but every time I change the source on the remote or do anything with one of the sources - such as stop/start/ffwd/rew/play etc a cd or dvd, I get a really loud thump through my sub - I have a Mission FS1 set. Now with my last receiver - Denon 1603 this did not happen. I unplugged all sources to try to isolate the prob - still happens when i changes sources between tv/dvd/tuner etc. Even with nothing but the speakers plugged in. If I unplug the sub and leave everything else in, it does not happen. So it seems that some kind of noise/spike whatever is being sent to the sub output when anything switches in the unit. Does this sound like a fault to you? (it does to me) - I cant live with it, as it is really loud - muting does stop it happening but thats a bit of a bind - to mute everytime i want to pause a film! So back to the shop for a swap then? Input would be appreciated! Thanks, Steve.