I installed the Deflex panels in a pair of sub woofers manufactured by Fosgate. These units employed the LE14 JBL drivers, and were designed to be downward firing. I was using these with two separate transistor mono amps, rated at 200 watts each. I took the woofer apart and installed the Deflex sheets on (as I remember) three of the five walls, and closed it up. The gain in performance at the frequencies that this sub woofer worked at was absolutely NOT worth the investment in materials and time. I should say at this point, that small reference monitor speakers are a better candidate for this mod.