how do I get a clean electric sound on my guitar i have a harmony les paul copy with to pickups and 3 options on a pickup selecter, and two tone knobs and two volume knobs. I don't have a clean option on my amp, and I have a gain knob, a master volume knob, a treble knob, and a bass knob. what settings should I use to get a clean sound. Just so you know I want the sound of the ren and stimpy theme song.