Yeah my high 40's score was acieved using bottom of the line lanzar audio subs. were talkin $35 a sub cheap. I wasnt refering to everybody either because i know there are some decent people on here. 40 cubes hmmmm not for my truck personally. Biggest box that has been in there was a 32 cube box for 2 matts juggernaut 15's. Thats pretty much the biggest box to fit in my rodeo comfortably.