Very disappointed in the quality. Full disclosure I bought this "used" but it never had a sub installed, I inspected the box and made sure it was not damaged. I installed a 12" Skar SVR, a sub suggested as "popular", and it blew the box apart... twice. The box looked and sounded good at first, but within 30 seconds of turning up the sub, the box broke around the sub. I glued this, clamped and reinforced with screws. Next morning on the 30 min ride to work the box essentially blew the top off as it is separated. This box will most likely work well for small or shallow mount subs, but not anything putting out real power.