So I'm putting together the rest of my audio system to install during/after my carpet replacement. PO replaced the alternator with a reman unit about 2-3 years ago (I have the receipt). It is the 94 Amp unit. Here are the two amps I will be using-

Kenwood KAC-2404S 4 Channel Amp w/ 30A Max current draw
Alpine MRP-M500 Monoblock Amp w/60A Max current draw

Obviously that totals a 90A maximum current draw. I am aware that amps do not pull that amount of current all the time. I have a Optima Redtop battery installed, and plan on upgrading my power and grounds from the battery/engine block/alternator. I will also be running a 1.5 farad capacitor, inline with my main 4GA wiring before it gets to the power distribution block and splits into two 8GA wires.

I am currently running the Kenwood amp on my interior speakers and have noticed minimal difference in the charging system. No sag or dimming, even when I'm running the blower motor, headlights, fog lights, wipers, and rear defog. I have never gone this extensive with a car audio setup, so I am hoping for some guidance from those who have gone this far and further.

Should I install a high output alternator (150A+)? RMS output of this system will be 650W total. I am looking to do this the right way the first time but I don't want to spend any extra money if what I am currently running is sufficient. I think it is also pertinent to add that I will be installing an aftermarket keyless entry system in the next few weeks as well, along with a digital sound processor and probably some LED footwell lighting in the future. Thanks for any suggestions you may have!

 

heres what I woudl do...I would get rid of the CAP kus honestly all those things do is suck...suck...suck....juice and just for an instance will ti release all its "power" and go back to sucking power form your battery.....its more strain on your battery.....and secondly I would get a HO Alternater, and possibly upgrade the battery later on if you get a dimming problem......

 

I stand by capacitors. They are just a buffer between your load and your charging system, but one I feel is necessary given my experience running high powered systems without them.

My question was more pertinent to the fact that I've never ran this high of a load with this small of an alternator, but I answered my own question last night when I hooked everything up and there was little drop in my charging system, even with A/C blowing and headlights on.