So I finally did the big three on my 98 Honda Civic DX....and WOW, what a difference.

My Alpine MRV-F345 voltage display was reading about 12v with front 6.5" comps and rear 6x9's only (no mono block)

Now it's reading 14-14.4v....time to hook up my new MRP-M650 and see how far it dips under load.

 

That's quite a gain, nice.

 

before and after wire sizes?

 

0/1 now. Was probably 12guage off the alt and maybe 8-10 on the grounds

 

Well I added my 2nd amp and the voltage fell to 13.2-13.6 on long bass notes...still not bad considering

 

im prolly gonna do my car this weekend...it has like 8 gauge wire for everything....glad to know that it actully makes a difference

 

I did this to my 91 corolla that we are building and went from 13.9-14.1 at idle to 14.52 steady after the big 3.

I used a double run of 4ga from the neg battery post to the chassis, double runs of 4ga from the chassis to the engine block and 2ga from the alt to battery.