give me an opinion on this system

I have a gmc s15 extended cab truck. and i am thinking about putting three 15"s in the extended cab part.

I have one extreme 15" from wal mart cheap i know.

And i am going to buy two legacy red series 15"s

And then buy a 2400 watt amp 2 channell legacy red series to push it all.

what is your opinion on it.

I may make my box like this
____
\ _ /

I would make sure they each have their own airspace. There's a guy with a cherokee around here that has 4 Powerbass 15s, but since they are all in the same air space with 2 firing up and 2 firing toward the rear, my 2 10s outbump him. He'd have an awesome system if he'd just rebuild his box.

that seems like overkill. 3 tens maybe

Spend the money on something that's actually worth it

Beer, women, a real sub, etc.
I guarantee you a single good 15 could kill those 3 POSs in every way imaginable, and take up less air space as well.

Legacy, Walmart Xtreme shit, Pyramid, Pyle, Lightning Audio, etc = crap

Well here is the thing. got a box for 2 15s i had some jd audios givin to me. so i had them in there one went bad so i had to get a new speaker didnt have the money for some big high money speaker so i bought the extreme one. would take it back and get my money back but lost the receipt. i am trying to sell the extreme and jd audio speaker.

and also trying to sell my 500 watt amp and get started over again.

Well if you want to start fresh don't go out and get the same crap you have in there now. I don't mean to be rude (I know I'm coming off like an asshole, lol), but IMO if you're going to do a system then do it right.

I don't really know what you're looking for in a system (sound quality, SPL, etc), but if you plan on using 15's you aren't going to get anything that even sounds decent unless you cough up the $$$ for something good.

If it were me I would ditch the idea of multiple 15's. If you get any 15" worth its weight in dog shit then just one of them will have enough output to make your hair stand on end, but it will cost you. Personally I would ditch the box, sell off the subs, sell the amp, and start fresh. Build a box for dual 12" or a single 15". Research everywhere before you pick your sub and amp, there are plenty of places to hear opinions (soundillusions, caraudioforum, here). It all depends on your budget really, but anything made by Elemental Designs, Resonant Engineering, Adire Audio, Image Dynamics, Crystal, and a few others will suit you great.

www.ikesound.com has about the cheapest prices I've seen so far, so you might want to look around there if you want something cheaper. The shipping on a 15 is going to be killer though. I haven't ordered from them yet though, so I'm not sure how reliable they are.

Well guys i dont think you really understood what i was talking about with my triple box. it will work if i close off each section like this

<img src="http://www.boomspeed.com/alexrep/box.jpg">;

im in no way an artist just trying to get my point across

and if picture doesnt come up then go here

http://www.boomspeed.com/alexrep/box.jpg

What are some good brands to look for in 15" s and i will find them.

Hey what about some emerson mobile or mtx's???

http://www.infinitecaraudio.com

www.caraudiodeals.com

www.carstereodiscounts.com

these are some top sites i have found

Never heard of Emersion Mobile and I've heard of just about every sub manufacturer there is (atleast all the decent ones), which makes me pretty cautious. Not that they're bad, they could be kickass and just came out, but I don't know. The upper lines of MTX get loud but don't have the greatest sound quality, the rest of the lines (the stuff they sell at Best Buy) is crap.

www.edesignaudio.com
www.adireaudio.com
www.respl.com
www.imagedynamicsusa.com
www.crystalmobilesound.com
www.stereointegrity.com