I feel pretty lam asking this question as I thought I knew about AVRs and well electronics in general. BUT lets start from the beginning
I have a set of polk Ts400 for my fronts, CS20 center and bose 161 rears. Powered by a Denon 790 (no sub LTE goes to fronts, its good enough for my needs)
Over the last couple years I thought my rears were sounding worse and worse, and b worse I mean almost no sound from them. Well the other day I decided that I wanted to move stuff around and unplugged my center speaker for the week-end and in the menu of the denon said no more center untill I finished shuffling stuff around. That night I watched a movie and some TV and whoa.... I figured I'd have a hard time with dialog tracks but not so much - BUT my rear surrounds were playing loud and clear! almost too much but since I havn't heard much from behind in a long time I was OK with. My wife even asked why I bought new speakers. So next day I switched the amp to have a center again - same poor volume from the rear (and yes I even jacked up the DB to the rear - a long time ago in fact)
SO I have a two part question... Can a amp "wear" out like this or is something actually wrong with the whole AVR? I've had since new so 2007 maybe? Would a new unit clear it all up?
hope this made some sense?