I plan on running 2 RF amps, a P1000-1BD @ 1.5 ohm and a P400-4. The P1000 is rated @ 140a and the P400 is rated @ 80a.
I have a stock 70a alt (99 Civic) and a new "normal" car battery.
Question 1.
Is 4-gauge enough? Or do I need 1/0?
Question 2.
Do I need a HO Alt? If so, is 120a enough...