The one DD 9515 I had was in a custom built 4.5 tuned to 40 hz box and got pretty loud but didnt have enough power running to it. So I sold to a friend and now I am looking at other options. I want to know if you guys would choose two AQ HDC 12 inch subs or the 1 AQ HDC 15. The two 12s would be in 6 cubes (give or take a little) and the 15 would be in 4.5-5 cubes. Both set-ups will be ran off of 2 AQ 2200ds. Looking for pure loudness. Thanks
