Oh, that's howIn the front I am running 6.5" Infinity Kappa Reference coaxials off the amp. I think I payed $40 for them. The rear doors have Sony Xplod 5.25" coaxials running off the rear channel of the HU. Then I have 5"x7" Cerwin Vega coaxials in the rear deck running off the amp.
I also have some Kenwood tweeters installed in the front doors, but I unhooked them because they're just too harsh with that much power running to them.
And the good ol Boss Audio BASS600 installed under the driver's seat. It was great when I was running everything off of HU power, but with the amp hooked up to the other speakers it just can't keep up.
I'm planning on putting a set of Hybrid Audio Imagine series components in the front doors and building custom mounts to put the Infinity's in the rear deck when I've got the time/money. Of course that'll be after I dyno mat the entire car.. so who knows when I'll actually get around to it.