the 6 1/2 kick very fast and hard.when the bass tone is done it stops,10 and 12s keep going.thats why i like them.for going out to make some noise i put my mtx tir-box in hooked to my 81000d.i know they are not spl woofers,but 136 from 4 is cool.i just wounder what 8 would put out in spl.i don't...