basically if it seems after a few hours of having my amp turned on then the head makes this buzzing noise as if something is vibrating quickly, if i tap it lightly on top then it goes away... It's a jcm2000 TSL 60.

This noise happens sometimes when the amp isn't even on standby , just happens when im playing, and i do think its some sort of vibrating thing because if i play a low power chord at high volume then even that can make the noise stop sometimes. The sound coming from the speaker does not change when the head is making this noise though.

Any ideas what this could be? It's abit worrying
Well,if it's a tube amp,and the problem only occours after a few hours...once the tubes are all warmed up...then you've got problems with your tubes.Maybe just check that the tubes are propery seated?
Seagulls,the chicken of the ocean.

Originally posted by Gunpowder:
Everyone just jumps on the bandwagon and gives the same advice in these situations. You know what? I'm going to be different. Call the firemen.