Sounds like 60-cycle hum . . .

foo

Active member
I have a Mk IV Boogie with a 1 x 12 EV extension cab.

There is a hum that I can't seem to get rid of. For live playing, it's not a problem as I can't hear it over the ambient noise, but a mic on it in bedroom #3 and it's really bothering me.

I've checked the mics, the mic cables, the speaker cable, turned off the fan in the amp, unplugged the footswitch, unplugged the guitar, tried the ground switch in all three positions, plugged it in to a different circuit - all to no avail.

Suggestions, gentlemen?

Thank you thank you

foo
 
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