Austin Holtzapple

Would I be able to hook it up for just one of the D3400 batteries and trickle them or does it need to be hooked to alternator? (starting battery and rear battery separate so won't kill starting battery) Also how would I know if it's getting to the point where it won't start ny car if I have it as a starting battery and one for amps. Install a multimeeter Imto the circuit.

Ok where would be other people to see if they have an alternator for it?

400rms door speakers 2000rms 1ohm subs Then upgrading as some point strapping another 2000rms for subs at 1ohm And then adding 600rms to door speakers

I am running a 120a alternator. Going to be putting in the D3400. The total wattage to start I'll have is 2500rms. I will be upgrading to about a 5000w rms(if I'm spending this much on batteries want to do it right the first time) Is this an ok battery for the alternator?(i can't get a new alternator because they don't make them... Dc power and singer can't make me an alt)