So i've recently purchased another kx600.1 amplifier and will be upgrading my subwoofers to 2 12" kicker L7's. also i've got a kx650.4 amplifier but needed to know what speakers/size/how many to buy. i'd like to go with kicker speakers but since they're hidden it doesnt really matter. any good component sets out there avaliable? and also with having now 3 amplifiers will i need a new battery? or perhaps just a capacitor?