JL Audio 12W6V3-D4 W6 Series 12 Inch 30cm Dual 4 ohm Car Sub Subwoofer 600w RMS
The 12W6v3 is best used with amplifier power in the 200W - 600W range and is optimized to operate in a sealed enclosure with only 1.0 cu. ft. (28.3 l) of air space, or a 1.3 cu. ft (36.8 l) ported enclosure.