Could it be that one of your cables going to the amplifier or preamplifier
is bad? A buzzing sound usually comes from a bad line level cable (RCA type
plug). Changing the speaker to that output wouldn't reveal that the amp is
bad, a buzz in the speaker is usually not (I wouldn't say never, but almost
never) caused by a speaker anyway. One way to troubleshoot it is to unhook
everything but the speakers from the amp, agitate all switches on the front
and back of the amp a few times, turn the volume all the way down and check
if the buzz is still there. If it's not, then something else, most likely a
bad connection or cable, causes the buzz. If it's still there, try to tap on
the amp in a few places to check if the buzz changes or goes away. If it
does, you may have a cold solder joint somewhere in the amp, that might be
worth to get fixed.

"Rob" wrote in message
...
Today my rear channel started buzzing real badly. I changed it to
another speaker to make sure it wasn't the speaker. I got the buzz off
another speaker, so I know the channel is bad. Is that something I
should try to get fixed or would it be cheaper to buy a new one. It's
a JVC 8000 VBK, which has all I need, DTS, Dolby Digital, plenty of
inputs...