JL AUDIO 12TW3-D4JL AUDIO (12TW3 D4) 12 INCH THIN LINE SUBWOOFER DRIVER (400W, DUAL 4 OHM VOICE COILS) Building on the core technology of our TW5 thin line subwoofers, the TW3s deliver a powerful combination of shallow mounting depth and excursion capability. In fact, they are capable of greater excursion than the W3v3s. To allow this remarkable feat to be achieved, JL Audios patented thin line woofer technology compresses the architecture of the TW3s using a