As part of the process changing my nav to non nav 100 I am upgrading the sound system. My sub was blown and frankly incompatible with the new amp so took a stab at upgrading to an 8" driver. I'm not done yet but thought I could post some progress pictures. Retro Sound has a really shallow <2" deep 8" sub that I thought would be a great fit. At first I thought that a couple MDF spacers was the best fit until mocking things up with panel in place and it would stick out way too far.