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Hi everyone. I do quite a few mods but i'm not too educated on effects loops because i just haven't done any. No request for them. I just put a tube buffered effects loop in a Marshall JMP 100 watter. I based it on a schematic i got from Lee Jackson's book, "Ultimate Bench Warrior". My question, where does the effects loop get it's signal from and where does it tie back into the original signal path? Someone said break the circuit at the treble pot wiper and install the loop there but the treble pot acts like another volume control. Any other ideas,tips on this. Thanks.