Good explanation Guitarlynn. It's scary that you know all this stuff. You must be an acoustics engineer or something. I don't understand about that harmonics stuff though. Why must amplifiers add sounds to the original? That's probably the only thing I didn't understand. Why can't they simply amplify without altering? Granted a slight loss in fidelity and slight noise are expected (though usually not enough for the human ear to tell) but adding tones? What's up with that?