Running comps up front and 2x subs in the back off of 2 amps. This will be going in 2007 Nissan Pathinder. The amps will be in the rear close to the box. Ordering from Knuconceptz and need to know approximately how much length of speaker wire should I order for wiring up the components and subs? Also, is 12 gauge fine to run to both or should I be looking at other sizes?