what upgrades would i have to do to run 4 kx850.2 kickers andi kx850.4 for mid & highs i figure alt. for sure but would i need batt. too? it is a nissan pickup would not be hard to ad battery but what wuold be best
You will need HO alternator, around 180A - 200A. Upgrading of your stock wires under the hood. Battery to ground, engine to ground and alternator to battery. Use 4 gauge or lower. You don't need 2nd battery unless you plan on listening to the system with engine off.