Hi Miles, I posted this in a seperate thread a few days ago, and I've been told I should ask you, as you are the amp guy...
I have a problem with my friends AC30 that we can't seem to pin down.
Basicly, there is a very loud and intrusive mechanical rattle that happens whenever we turn the amp up loud. It does not come thru the speakers, but it is loud enough to be picked up by any microphone we place on the cab, no matter the positioning. We've looked the amp over for any loose screws or anything that could be rattling, and no luck. We also just had the amp overhauled, replaced the tubes, etc., and altho we told the guy about the rattling, when we brought it back to the studio, it was still there.
Anyone have this happen before, or could make and suggestions? We are going to start recording soon, and we really need to use this amp, but as it is now, it's useless. We are taking the amp back this friday, but the tech seemed perplexed as to what may be causeing this. I figured I'd stop by here and see if anybody has any words of wisdom for us. Thanks!
P.S.
I should also state that this happens even at "respectable" levels, not just when it's turned to "11". Clean tones are also affected by this rattle, and it appears that the level of the rattle does not change when the amp is turned up...the rattle is constant no matter the amp settings.
Thanks for any help you can give Miles!
Marty
