yea i could give each 10 up to about 2 cubes a peice they are smaller subs but its alot of cone surface and ive always been told more cone surface higher db's.. but i also felt powering the $hit out of an aluminum coil aq 18 hdc3 might be just as good and more simple for build.. i have untill febuary 2011 to get it done for casper so time wise im fine just need to do decision making... ive considered btl 15's sa-8's even just dont know exactly what i want...