JL Audio 12TW1-2 12-inch (300 mm) Subwoofer Driver, 2 ΩTW1 12 inch Subwoofer (300 W, 2 ) Built on JL Audio's patented thin line subwoofer technology, the 12TW1 delivers a powerful combination of shallow mounting depth and excursion capability, while operating in insanely small enclosures (0. 65 cu. ft. 18. 4 liters). This, combined with a special cast alloy frame design, makes the 12TW1 capable of operating in extremely tight spaces. These include under seat installations in trucks, 2 seat sports cars and