SeaKing Stores › 10in car subwoofer - 4ohm DVC - R2D4-10 10in car subwoofer - 4ohm DVC - R2D4-10 £280.00 10in car subwoofer - 4ohm DVC - R2D4-10. 250W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated. Add To Cart Added! 10in car subwoofer - 4ohm DVC - R2D4-10. 250W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated.