JBL STAGE 82 8 SUBWOOFER. Available in three sizes-8″ (200mm), 10″ (250mm), 12 (300mm)-for every size vehicle from compact to limo. These subwoofers feature lightweight yet stiff polypropylene woofer cones with hi-roll rubber surrounds to provide high-efficiency and super durability to best interface with a variety of amplifiers. Finally, our subwoofers and loudspeakers are individually voiced by some of the world’s best transducer engineers to ensure we achieve the signature sound that is unmistakably JBL. Frequency Response 38Hz – 200Hz. Voice Coil Diameter 1.5 in. Top-mount depth: 3.9. 1 x Foam gasket. 2x two-colour brand stickers.