Hi Everyone:

I have a couple of questions about pre-amps and amps that I hope someone will answer.

I have a Denon avr3311ci, M80s, vp180, qs8s, and a crappy sony sub from and old HTIB.

My questions are what is the purpose of a pre-amp?
2) will an external amp make my speakers sound better?
3) if I were to buy an external amp what would I buy a mono, stereo, etc?

I have looked at this and other forums and there is lots of information, however I have not found a simple dumbed down answer. any information will be greatly apreciated.