Youre all about that optidrive stuff lately i see, whats the big deal about a sub taking 3k when you can move another sub the same amount with 1/4 the power? The new optis look just like anything else, RE SE, FI Q, etc. I heard an opti 15 one time on 1500w and wasnt impressed at all. The audiopipes are VERY efficient with their power, guess its in the motor design.
OP you may be interested in this thread.
http://caraudio.com/forum/subwoofers/435659-up-close-personal-new-audiopipe-txx-15-a.html