Diamond series subwoofers may be the starting point in Diamond Audio‚Äôs product line but it is definitely far from entry-level. Diamond series subwoofer models are all dual voice coil and motor parts feature an all black chemically treated coating for upgraded performance. A heavy gauge black powder coated vented stamped cross flow steel frame provides excellent thermal dissipation. A fully covered wrap-around gasket provides protection from any air leaks and gives the subwoofer a nice tight seal and finished look. Whatever your application, Diamond series subwoofers will deliver the high performance that you have come to expect from Diamond Audio at a very attainable price.