Or perhaps not, I'm not sure as yet. See, last night I had quite a few friends round and everything went pretty well - nothing too significant broken I thought - UNTIL I tried to switch my music / HC system on. As I turned the amp and sub on I started to hear a deep hum coming out of it and following that a noise started coming out the right rear speaker, which I can only compare to that of an old cassete tape rewinding. This was in the middle of last night and being rather slashed out the time I went to bed and decided to worry about it in the morning. Well here I am and it's not good news. The sub continues to hum constantly if it is on and the amp is off, whereas the right speaker, far from being broken, now appears to be the only one working. Sound from any AV source is now played through just 2 speakers - the sub and this right rear. A far from ideal situation , especially as today was meant to be a DVD extravaganza! Does anyone know what could be causing this problem. I have not knowingly changed any of the system settings and it was all working fine before last night. Water (or rather beer) damage seemed a possibility though I can't imagine when it happened. However, would this explain why 2 of the speakers work perfectly on any mode (5.1, DPL2 etc) and I can't hear a peep from the others? I checked all the connections this morning and they're fine - all as before. Anyone got any ideas then: this is my setup: AMP : Marantz SR4200 SPK : Mission FS2-AV set with active subwoofer. Cheers in advance.