This extra depth model provideS improved low-frequency performance of 8" commercial and professional loudspeakers. Increased volume extends bass response by allowing additional acoustic loading. Unit is perfect for cost-effective applications where enhanced audio quality is desired. Enclosure has the same features as the standard 95 and T95 Series with the addition of a 1 1/2in (38mm) thick fiberglass filling having a density of (1 1/2 lbs. per cu. ft.).