SeaKing Stores › 10in car subwoofer - 4ohm SVC - P1S4-10 10in car subwoofer - 4ohm SVC - P1S4-10 £88.00 10in car subwoofer - 4ohm SVC - P1S4-10. 250W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated. Add To Cart Added! 10in car subwoofer - 4ohm SVC - P1S4-10. 250W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated.