using multiple amps

First off... BAD! Yes, in all caps! While I am not necessarily a fan of Kicker stuff in any way, shape or form, if you are amplifying everything else, FORGET, PLEASE the idea of powering tweeters from the head. You are already telling us that you are going to have 6 tweeters in there, (4 in the six-bys, and two in the 6's, right?) four (?!?!?! - rediculousness, in the highest) more won't be necessary, and it's ONLY gonna make it louder, by less than 1dB, in that frequency band. If you are trying to completely forego ANYTHING resembling sound quality, go for it, but your description (the way I read it) is exclusively an SPL system, with no regard for SQ anyway. BUT, to answer your question, you could use signal processors, such as "surround" processors, (or 5.1, whatever they are calling them today) crossovers, EQs, or even just "Y" adapters... The Kicker amplifiers will also (probably) have output RCA jacks, as well. These can be used for daisy chaining to other amplifiers; basically, whatever is on the inputs will be present on the outputs, possibly crossed over, possibly not. Here is where you will need to read the owner's manual, which will describe ALL of the capabilties of your chosen electronics.It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Thank you for letting me know that it was a bad idea before i went and spent alot of money. Since my idea is not a good one then what would u recommend for an extended cab chevy xtreme? I want something that's really loud but still has good sound quality.

you're gonna need a new 200-300 amp high output alternator

aznboi3644 wrote: you're gonna need a new 200-300 amp high output alternator

Yep... There's where I'd START! Honestly, I have no idea as to the "loud" aspect. I don't build "loud" systems. My efforts are almost exclusively geared toward SQ, and I like to think I take SQ to levels far and above what most people consider adequate - I call it "Uber-SQ". While the systems I design are CERTAINLY loud enough for me, your idea of loud and my idea of loud are going to be two completely different views. As an example, I am running 1200 watts to the doors in my Civic, in a 3-way system, (150w, 150w, and 300w) with processing capabilities "out the wazoo", but I'd never consider it a "loud" system. While realistic sound pressure levels are WELL within reach for this system, 108dB to 110dB peaks are about as loud as I'd ever be able to push it, without bending something... I'll typically run about 95dB to maybe 100dB, on a continuous basis. Transients are FAR louder, due to the "excessive" power capacity, but as far as an RMS SPL, not "loud" at all... There are others on the board that can help with your "loud" quest, though. Keep checking in, I'm sure you'll get responses...It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."