OLD SCHOOLback in the mid 90's orion put out a newsletter every few months with box designs and stuff in them. they had a 4th order alot like this for their xtr 15's. was freakin awesome.i had 4 15's in them cut thru the bed of a reg cab truck on 4 250 hccas. sounded great for it's time. you guys now probably have 2-8's hitting harder lol. but back then there were no local shows or anywhere to meter systems here.