well i got my two 15" RE SEs hooked up off my autotek xs1600x shoving them 1500 or so watts rms. gains are about 3/4s up and no distortion. nice and loud(loudest at skool now). but i just have the urge to get louder. i dont have much space though and i dont really wanna get a new amp. the max deminsions i have is what my box is now. which is 17hX36wX19d. so thats like what 4.x cubes internally. i was thinking maybe two d2s or two 12As. what do u guys think?