Mine sure does. It's not the loud noise associated with a bad ground or switched wires on the input jack, but it does annoy the heck outta me. It's in all three switch positions, every type of cable I can find, on a Marshall AVT20 with no gain and no reverb dialed on, and on a brand new Fender Mustang III v2 in just about every preset. To top it off, if I plug in my Gibson LP Studio, I get no noise, no hum.....no nothing but sweet tone. Has anybody got an idea? I even sent one back and had a new one sent over. Same thing. No better. Thanks folks!