I'm pretty sure this is the wrong forum, but I can't think of where else to ask. Feel free to move. I'm interested in finding out how hard it is to alter an amp's input impedance. I've seen that some companies use 10m ohm inputs to accomodate piezo pickups. Is it reasonably easy to modify a standard input jack to do this? Could it be within reason for a local amp tech to swing this? Thanks.