okay so here's my projected setup for my 2000 Civic EX coupe

(have) pioneer 6800MP h/u
6.5" 125w-RMS Polk MMC6500 components (front doors) (190$ shipped via pricegrabber)
(have) 6x9 70w-RMS Kenwood 6903ie 3-way Co-Axials (rearDeck) (55$ bestbuy)
(have) Amp- Profile HA1040 (105shipped via amazon)
Subwoofers- Eclipse sw6124BXD From CircuitCity (400 +tx @ cc)
Amp- Alpine mrp-m650 400w-RMS x 1@ 4ohms (206$ shipped via pricegrabber)

How should i wire this setup? 16/18g wire for speakers to amp?
-can i run 1 4g and split it to 8g to both amps?
-is the small battery in my civic going to be able to handle this?
-anything else i need to know/should know?

are those good prices any better prices for what i can buy? is there any other amps that are cheaper.

giveme some input & advice basically thats what i really need.

 

Not necessary, but try and use the largest gauge possible. Might seem overkill, but you don't want your "power wire" not providing enough power.

Unless your max your gains, your stock battery should be ok. Highly recommend a capacitor and if your willing, rewiring the alternator for more amp output.


*hint*
The biggest thing to consider is power. Amps, need power and if you can't provide the power then the amp suffers, making the audio suffer. So in short do what you think is plausible to make sure your amps have plenty of juice.

Also, source needs to be away from any "power" wires. Running source near or on your power wires will create noise. Run "power" wires on one side of the car and source on the other side of the car.

 

okay so that whole seutp is compatible? do i need a better amp/sub or is that too much?

also will the coaxials be sufficient or should i run adapter plates + 6.5" polk mmc6500 in rears also?