Ok my amp buzzes even when it is not hooked up to my guitar, so I assume something is wrong with my amp.
I've tried turning my gain, and every other setting all the way down, and it is still buzzing.
Does anyone know what is wrong with it?

Thanks for any help.
if that is happening without guitar plugged in then I would check a few things:

when did this start and did it come out of no where?
did you move the amp or plug something new into same power feed?
does a dummy jack or different guitar have any affect?
is everything bolted down good (unplug first)....what kind of buzzing?

last resort...take it in
I have this amp and I think I know what you're talking about. Try using the noise reduction feature. If you don't know what I'm talking about, just turn bypass on and hold down tap and turn the EDIT button to the adjusted level to remove the buzz.
Gear List:
'97 Gibson Explorer w/ Duncan SH-4 and SH-2
Fender Jazz Bass 'Crafted in Japan'
Yamaha Acoustic Guitar
Vox AD30VT w/ VFS2
Roland Cube 30 Bass
Modded "St. Louis" Wah
Dunlop .88 Tortex picks
Thank you Wolfy!
I hardly ever paid any attention to those buttons but after fiddling around with it for awhile the buzzing is gone