39 WIDTH 39 LENGTH 19.5 HEIGHT finally wired up the rockford fosgate and was utterly impressed with the bass but I WANT MORE!! gave the box to my brother as a birthday present just recently bought these subwoofers http://www.sonicelectronix.com/item_3981_Audiobahn-ALUM10N.html reasonably priced if you as me 800 RMS??? thats a big improvement over 150 rms cant wait should be here by friday what size box would you suggest yhall? thanks again