Hi I own a 2006 Infiniti g35x AWD and I just replaced the stereo, and added 2 amps with 1 amp to speakers and 1 amp to the subs. I have 2, 10" kicker L7's with a hifonics brx1200.1d hooked up to them @ 1 ohm, 1200 watts. The other amp is a JBL amp that was $459 on sonic electronic I don't remember the model but it's going to the stock Bose speakers. The head unit I do remember was a pioneer AVH-X5600BHS touch screen 3, 4v pream outputs. My headlights seem to dim; not a baaad bad dim but dim slightly and it's worse at idle. I wanted to know what would be better I am torn
between adding a second battery or adding an alternator with the big 3, or both. I have the alternator ready I've been wanting to upgrade the alternator, but no shop around me or dealership will install it or replace the wires because it's an Infiniti and all the parts are so damn specific to the vehicle, but I also might just install a second battery (XS power 22AH 750watt battery) to the system with an isolator between the front battery and back one. What do you guys think I should do?

 

Ttt

 

a capacitor would be the cheapest and best way to start before adding batteries