I recently bought 2 12" kicker l5s (600 rms) with a hifonics brz 1200.1. Ill run the subs to the amp at 1 ohm so each gets its full 600 rms. I also have two 6x9 sony xplods which im guessing run at around 100-150 rms. My first question is will i need a ho alternator? the car is a 2000 honda civic 1.6 liter FI so that alternator is a weak 70 amps. If i do need a new alternator, how many amps will i need exactly and also how do i make sure the new alternator will match up with my car? will i need to upgrade belts as well? do i need to get a new battery to match the alt or can i just buy new terminals to fit the 0 ga wires from the big 3? i know its a ton of questions but im just trying to do this the right way

 

I have run numerous systems in my Civics without HO alts, that's not saying I should have run one, but it is not 100% necessary I would think.

The biggest system I ever installed was a 2 12" Alpine type R's at 4 ohms (maybe about ~300rms each?? - big guess) Two amps and all Sony xplod speakers. It bumped, but I could tell it was a struggle for the ALT when not driving. The headlights would definitely dim when the bass came through.

I have toned it down a little since then and I am running a 5 channel Alpine and one 10" MTX sub now (~100 rms) with Pioneer 6x9s in the back and a set of Memphis Audio component speakers up front. To me, it is a perfect balance between highs and lows.

As for an HO alt, I believe a member on here was selling one a while ago. He is big on sound systems and can help out if he still visits the forum. His user name is addiction2bass.

Let us know if you have any more questions.