[Reumster]

I don't know if I missed it in all the replies. But the most important thing in building a good clear sounding car audio system is crossing all your speakers right. You don't need high dollar amps, or really high dollar speakers either.

A cheap way to go is a good head unit. And buy seperates(tweeter, and mid seperate) with passive X-over. Then bet a amp with built in low pass X-over for your subs. This will make sure all your speakers are getting the right frequincy.

The next method and best allround is to use a 3-way electric X-over and 2 4 channel amps 1 for 4 tweeters, and 1 for 4 mids, and one for subs. Or for only one set of speaker get 2 2 channel amps.

The important thing is X-ing every thing over right. The best method for 3way speakers is 1 keeping the bass turned all the way down on head unit, or 2 putting inline caps on the 3-ways.