you'll also need to run atleast a single run of 0ga. with a dist block for 0ga in, 2 4ga out. Fit the largest battery you can up front so you won't need an extra in the rear.
To do this, you need to get a capasitor, this builds and stores power for things that require sudden voltage. if you run dual amps, you have to have it or you'll burn up the alternator and kill the battary! This will illuminate the need for a second battery. You wire it in line on the power wire. Use 0Ga power wire because of the power demands. for a ground wire, for those amps, i reccomend a 6Ga wire. If the amp(s) are not grounded properly, they will get hot and shut down. Capacitors start at about $30.00 Dollars (US Dollars) and go up. You can order them online or find them at a car audio store.
^^^^ dude learn sumin be4 you start posting dumb ideas, benjamin do not listen to zach fo 1 a cap sucks b8lls and do not work, 2 even if they did work lik they supposed too it still wouldnt work, your gonna be runnin a lil over 2000 wats prob so you NEED A HO ALT AND PROBABLY A BATTERY!!!!!!!!!!!