I found the Drop pedal to be much quieter if I hooked it up by using the effects send and return loop on my Line 6 flextone II amp. If I tried to go from guitar to drop pedal then direct into the guitar input jack at the ront of the amp the hissing noise was really bad!! I do not know why this is the case and wish someone would chime in on rhis issue. On the other hand if I plug the Drop pedal into the front of a tube amp without using the effects loop and straight into the guitar input it's nice and queit. I don' t get it. Seems like Line ^ solid state amps do not like the drop pedl being hooked straight into the guitar inpt jack .Way too much hiss. Use the effects loop and it's quiet.