allright, i sent back my dx's and now i need to build a box for the 2 gnx's im getting back. im really stuck on the iso push pull idea, is there a plan for the gnx's in that design? also i requested DVC's so i can get 200 watts to each sub! (if that makes a difference). Also, I am running these on the rear channel of a 4 channel amp, which doesnt have a sub-sonic filter, could this be hard on the subs? also, could it be the reason my dx's blew? thanks for the help!