Ok im pretty new to car stereo. My question is what is a crossover for? HOw exactly does it istall? Its probably a stupid question but I know you guys know your stuff so thanks in advance.

 

The question is, why do you want crossover?

A typical component crossover is designed with one purpose, to put Highs to tweeters and mid/lows to woofers.

Usually they look like this
________________________
- Tweeter
+ Tweeter
- Woofer
+ Woofer
- Input
+ Input
- -10db
+ -10db
__________________________

More info can be found here
http://en.wikipedia.org/wiki/Audio_crossover

 

i was looking to get one because my dealer had one in his xb and it hit pretty good. So i was really wondering if that had much to do with it.

 

A crossover will not hit. Component speakers, plus a 4ch amp will help. You can use the crossover with the Door speaker and the dash speaker, but why not spend the $200 and get a component 6 1/2 speaker set up with crossover .

 

ya good call.....Thanks man