Can you use kicker power wire for both the fire and ground or does it have to be specific. power wire to fire and ground wire to negative? hope this makes since

wire has copper in it. doesn't matter if it's got blue or gray insulation (or purple for that matter), copper will be copper. use whatever you have.

ummm ya. what he said

Just make sure it is a gauge that will support the required current.

thanks fellas 0/1 gauge it is

It is nice to have color to denote what is power and ground, but not required. Size matters and thats the important thing.

Remember, it's not hard to wrap a wire in black duct/electrical tape so you can remember what wire it is

Buy a spool or two of Kicker Hyperflex and you're set for a while.