JL Audio 12TW3-D4 12 Inch TW3 Series Shallow Mount Subwoofer Dual 4 ohm 400w RMS12TW3 D4 Shallow Mount 12 inch (300 mm) Subwoofer Driver, Dual 4 TW3 12 inch Subwoofer (400 W, dual 4 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