also I already have a 4 in there now so I dunno
I just added up the cost of the wiring
figure I need around 25 feet of 1/0 gauge from KnuKonceptz. 20 feet for the car, 3 for ground, just say $80
distribution block $15
ground block $ 18
inline fuse $20
say $5 for terminals
thats already 138 nevermind rca cables
now if I did the same cable and length, but 4 gauge, it would total $32.20 and another $5, I'd be in for $37.20
tough decision lol
edit: if I went with the 0 gauge setup, I wouldn't have to worry about dist block to amp connections since I would already have 4 gauge tere