JL Audio 13TW5v2-2 13.5-inch (345 mm) Subwoofer Driver, 2 ΩTW5v2 13. 5 inch Subwoofer (600 W, 2 ) We couldnt leave the ultimate thin woofer alone we had to make it even better. Our patented thin line woofer technology compresses the architecture of the 13TW5v2 using a concentric tube structure that supports the 7 inch diameter voice coil and the suspension attachments. This permits placement of the large motor structure much further forward in the speaker than with conventional designs, while allowing