Hi all. Got back in to car audio for about a year now and I love it more than I ever have. Modest system for now. 4 HDC3 18s on an Addictive Audio 500.1. 3 Kinetic 2000s and a 370 amp Mechman alt. I don't compete or anything like that. I just like a lil bass. Looking to either buy another 500.1...