hey guys im getting a system and i wont huge spl !! so i have basically decided to get dd audio. but the big question is what would be louder getting two of their lower range subs, 2 x dd 512's or getting one of there higher range 12 or 15? cheers, and im sure ur gonna ask tempends on amp etc... im prob going to ahve them running on a 1000 rms amp.. cheers