JL Audio 8W1v3-4 8" 20cm W1 Series Car Sub Subwoofer Driver 4ohm 150w RMS8W1v3 4 8 inch (200 mm) Subwoofer Driver, 4 W1v3 8 inch Subwoofer (150 W, 4 ) The 8W1v3 is an outstanding choice when space is very tight and amplifier power is moderate. It features shallow mounting depth (3. 86 in. 98 mm) and a compact motor structure, allowing it to comfortably fit in a lot of spaces where a typical 8 inch driver will not. Lacking a pole vent, the rear of the motor structure can be placed directly against an enclosure boundary.