SeaKing Stores › 8in shallow car subwoofer - 4ohm DVC - P3SD4-8 8in shallow car subwoofer - 4ohm DVC - P3SD4-8 £160.00 8in shallow car subwoofer - 4ohm DVC - P3SD4-8. 150W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated. Add To Cart Added! 8in shallow car subwoofer - 4ohm DVC - P3SD4-8. 150W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated.