The setting on my amp (15w) is about as important as playing a tuned bass, so far as I can tell. I know **** about the amp, so here goes: 1) whats "treble"? 2) whats "middle"? 3) whats "bass"? 4) whats "presence"? 5) what settings should I keep it at? 6) do bass and trable need to be at equal settings? 7) is it ok that I keep middle completely off and presence nearly off? 8) I like to keep my treble at about twice the setting of bass. is this ok? what are the results. 9) aparantly, after reading through some threads, its possible to destroy your amp. how do I keep from doing this? 10) Any tips and 'must knows' youd like to share? thanks.