I just picked up a DD 2515b with the supercharged option and I'm beginning to design a box for it. What size boxes and tuning have you guys used for these? I'd like to retain as much low end capability as possible while being able to throw up a good spl score. Is it worth it to build the "DD box" ? The suspension is super stiff, it was just reconed by DD according to the guy I got it from and has less than 20 hours of play time. Power will be 1400rms before rise until I can upgrade to an MBQ 2k. I don't know much about these subs, but I know the price was too good to pass up.