Daniel, as a pro auto audio and video installer, I'm curious as to why you choose to run such nice subs off of some Sony amps? Sony has an overblown reputation due to good marketing but not good product. I prefer Rockford Fosgate amplifiers (the older series). I have one 12" Pioneer flat sub in the flat mount sealed enclosure and power it with a Rockford Fosgate 500 BD monoblock Class D amp. Now I am also a big Pioneer subwoofer hater, but this flat sub fits perfectly behind the back seat and sounds super clear and deep. It's really nice. Do you have pics of your setup? Not bashing your system at all, just curious in why you decided to pick those combinations.