I have a 2006 Double cab. So my brother ordered a box from supercrew sound for his 2008 silverado 1500 rcsb. He didnt like the feel of having both a sub box behind his seat as well as the passenger seat so he cut one of the sub boxes off. Now before everyone goes crazy, the box was like this.. a sealed box, then an amp rack, then a seperate sealed box. So the box he cut off is still sealed. It has .8 cu ft of airspace and the cutout is for a 12. The box fits perfectly between the rear cupholders and the back seat. I am contemplating sitting the box here and screwing on two "arms" so that i can bolt it into the center console so that it does not move. The box has a mouting depth of 5.5 inches and I will be powering it with a crunch Powerzone 2 channel 1400 watt amp(i know not the best amp, but i already have it). What sub will be the best to get? I was thinking possibly the memphis 12" shallow mount, or the rockford p3 shallow mount? I am open to all ideas. Thanks.