the title says it all and i have no idea wat it is can u guys help me
Quote by classicrocker01
You know you're addicted to gear when you've had more guitars than girlfriends

........that would be me
The pre-amp is the something that will take your guitar's signal and amplify it, before it gets to the main circuit of the amp. Power amp then amplify the signal post circuit so that the signal can drive the speakers. It's also where most of the crunch of distortion comes from.
Fender '72 Telecaster Deluxe Reissue -> Korg Pitchblack Tuner -> Boss PS-5 -> EHX Big Muff -> MXR EVH Phase 90 -> Menatone Pleasure Trem 5000 -> Line 6 Verbzilla -> MXR Carbon Copy -> Boss RC-2 -> Peavey Classic 50
In a guitar amp, there are 2 parts of it. A preamp, and a poweramp. The preamp is what shapes your tone. When you turn a knob on most amps, you're affecting the preamp section. The gain and tone controls are in the preamp. The poweramp is what powers the speakers. That's as simple as I can put it