Hey, all. I'm new here, but here is a trick one of my freinds did. He used an old Fender Stratocaster tone control, in line with the audio wire on the mic connector. Just use the center wire, and the wire soldered to a cap. You then have tons of treble/bass adjustment. You can get them cheap at a guitar store, or google "guitar tonr control" and tailor make your own. Clapton does it all of the time, and I think he knows a bit about guitars and tone. Just a thought.