Installing a full system...what wire to buy?

I've been there but all the different gauges confuse me slightly. Also, I may not have my two amps in the same location. My car came with a speaker amp under the passenger seat and I plan to place my speaker amp there to make wiring easier if it fits. Do I need to run two power wires to the battery? Can I run one and split it? I've only ever hooked up one amp before and I used a 4 gauge kit.

 
You can use a 4G for your needs. You can also run 1 wire from the battery to the back of your car and hook it up to a fuse distro block. Then run those two wires to your amp.

 
I would not suggest that you remove your factory amp, as there are a lot of things that are routed through there aside from your radio.
Such as what? This is a factory Bose system and I plan to remove the Bose amp.

A 4 gauge power wire will be enough for all the power I will need? I thought for sure I would have to go to 2 gauge.

 
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