So I got the new Kenwood head unit installed with thicker 12 awg shielded wire. Sounds better than the old aftermarket head. https://www.crutchfield.com/p_113KDCX701/Kenwood-Excelon-KDC-X701.html
Now I just have to install the 100 amp fuse inline of a 4 awg cable, yeesh, I need to get some...