I'm currently running (2) 15" Type Arggghs. I'm using a plan I got from this site in the free designs section. http://img35.imageshack.us/my.php?im...z60sqin1ei.png 4.4 @ 35 It does beat don't get me wrong but the manual says I should have 3 cubes per sub. so would i benefit from using a bigger box? Last question, since the box wasn't designed for the subs, about how much did the tuning change?