I am thinking of going with 2 sets of components for my front stage and doing away with the rears.(maybe) I have a Alpine PDX 4.150 that does 150 x 4 rms to each channel. Right now I have the fronts on the front channel rca and the rears on the rear channel RCA's. So I do not mess with imaging too bad do I just run RCA Y spitters just on the front channel from the head unit so I can use all 4 channels of this amp? I need something to keep up with two 18's and I think my current front stage would but since my rears will blocked by the huge box I might as well double up front and use all 600 of this amp