Your box Looks really good! Here's what I built awhile back. Its 2 12" sealed enclosure. Hits really hard! I originally had JL12W0's but eventually blew them. Picked some low end Fosgate's but the diameter was bigger and thats where you can see i had to cutout/notch the lip on rhe front side of the box and I ended up blowing those too! So my amp was too strong for these so I finally found the right sub as depth wise my box was 6.5" deep. These Kicker CompR's have only a 5.75" top mount depth and can handle 500 rms which was perfect for running the bridged. I did the seat mod which gave me a clearance of 2 more inches that way when the subs are hitting they don't hit the bottom of the seat! I also used 1lb of polyfill in each chamber. think I'm gonna rebuild another box just because those 2 notches I cutout is really making my sub box look ghetto lol!