I've had my Dcon 10 d4 for about 3 years and I love it. First was a ported box at 33hz. Very impressive, sounded like 2 12's but I wanted more sq so I built a sealed box. Still impressive volume, much better sq for my type of music (pop) but I kinda want more... If course lol.
I would love to find a used sub to match this one, the older version. My amp is 1 ohm stable. I would just need to build a new box and I'd have the volume I want without sacrificing sq. I have looked but not had any luck yet.
But is there another option with a ported box? Maybe tuned to a different frequency that would get more volume but better sq than before at 33hz? All this in a shallow box behind the back seat of my 2006 Sierra Crew Cab. I had to use a little fiberglass to make the subs fit depth wise but it was very worth it.