I know NOTHING about amps and pre-amps. I grew up playing Upright, and only messed around a bit with electric. Now its really all I do... BUT... I know NOTHING about amps and pre-amps. What is a good amp? How powerful does it need to be? What the hell does 2x100 or 8x10 or whatever mean? What is a pre-amp? How does it work? Is it necessary? What are some good ones? I know its seems hard to believe that I am this ignorant after playing EB for 10 years... but its true. I never knew anyone who knew about amps and pre-amps, who could show me the ropes, so to speak. I bought a Behringer 600BX not too long ago (60 watt, 12"). Is it crap? Would a pre-amp like the SansAmp help? To reiterate... I know NOTHING about amps and pre-amps. A short primer would be most appreciated. I play mostly at church and in small bar-like spaces, where loudness tends not to be such a factor.