[Urban_Squrill]

A crossover just seperates Frequency's, hi's go to tweeters lows go to 6.5 mids. For speakers logic 6*9's are the bomb. But the problem is that u have to put a spacer in. Audiopipe conponets(6.5 mid and 1'' tweeter) are good. For subs Rockford Fosgate. The old skool rockford fosgate amps are the best for subs IMO and kenwood's are the shit for mids and highs. For sub boxes the depends on what kind of music you like. Loud ass rap and really deep base go with a ported. For really fast metal and shit like that go sealed. For a little of each go bandpass. Ebay stores are ur friends.