The RDV12M is a dual 12" vented dual chamber subwoofer box is made in the USA. This enclosure is made for subs that require larger air space. Each chamber nets 2.0 cubic feet of air space. This enclosure is made with precision cutting machinery by industry experts that have been making these enclosures in the USA for over 20 years. All Rockville enclosures come with a customized enhanced glue that is unmatched by any other manufacturer. That means that the carpet will stay in place and not rip or tear. The ¾" USA MDF is much stronger then any type of import wood. This will keep your box performing at an optimal level by not flexing and distorting your woofers. Your woofers will thank you! EVERY Rockville enclosure is not only glued at all joints but stapled as well. If that wasn't enough we add a layer of silicon to every seam! This makes your Rockville enclosure rock even more!