I have 650 watt Rockford Fosgate car stereo and would like it a bit louder?

[huggl]

The sub is overkill already, but some songs I just want blasted-800 to 1000 worth. What should I do ? If u say amp, what kind?

[Bradley C]

i am assuming you dont have an amp for your speakers, you only have an amp for your sub. i would get a 4 channel amp, if you have the stock speakers, you will want to upgrade those. now the specific amp isnt going to make much of a difference since you are using the sound for everyday listening and not sound competition. so i would look at your budget and choose the best 4 channel amp and speakers you can buy for your budget. good luck