for some reason,it seems like i remember big jbl subs being really efficient,10 hz has gotta be insane,i know how bad my eyeballs rattle in my truck,and my subs are cabable of 18hz but have never had it on an rta.i tuned my sealed boxes somewhere around 42 hz,but these things are going much lower,they do things my home(ported(2)) sub will not touch(rated at 22 or 25hz)!

if you can deal with metal and have no sensitive ears around the house try out DOPE:LIFE.tracks 1&6 have bass lines that would just have to be stupid loud on your system!don't stream it or use a burnt copy,the bass isn't there.trust me it would be worth the $15 just to have it 4 a demo.i used track 1 with 4 12's,in my truck,on the spl meter and hit over 150db!