soxfan13sk8

I still don't know what amp to purchase?

I'm all new to this car audio stuff so I'm a little lost. I have a 2002 Jeep Grand Cherokee and i bought new speakers for my front and rear doors. my fronts are 6x9 Boss speakers and my rears are 6.5 Boss speakers. I wanted it to be louder and not to sound like crap when i turn up the bass and treble. It now sounds good except it's the same volume limit as the stock speakers. The rear ones are 400w a piece and the fronts are 350w a piece. Shouldn't the volume be able to go a lot louder than my stock ones? is this because I have a stock head unit? Should i get an amp? Thanx.

My 6.5's My 6,9's My headunit I bought That will be my setup once my headunit arrives. I know next to nothing about amps. All i know is that they increase the power output. Could you give me a little more insight into what they are? What model should I get, (cheaper the better)? And maybe even a good link to a description on how to install one? Thanx again.