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Discussion Starter · #1 ·
Have a Marshall 8100 valvestate that's been sitting a little while..When I was connecting it up today with a Lexicon MPX G2, I noticed that there are different frequencies coming through (almost like turning the dial on an AM radio). It doesn't seem to do this with the guitar plugged straight into the amp, but when I run the guitar to the G2 and then out to the amp, it starts..It only does this on the Marshall, on all the gain channel tone knobs - contour, and volume knob, even if I switch the loop on the amp from 100% wet to dry.

Anyone have an idea on what could be happening?


Thanks
 
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