I agree with this ^^^

I felt the need to let loose some juice and studied the Big 3, and quickly realized it isn't so much necessary. The Alternator to Starter and Battery is 1/0 --- Literally no need to replace or add to. The battery ground to chassis I added a 5 gauge. Other than that, I put new terminals and cut back the coroded ends and it helped my flickering lights quite a bit. After that I put a 1 farad CAP in and no more flickering at all. - Edit on CAP, it's a 1 farad but probably only good for .5 (you have to be careful on claim vs performance of those things.

My tweeters are 175W RMS each and my 2 ten's are 150W RMS each. So 650W continuous. I would get a good CAP and call it a day.