SeaKing Stores › 10in shallow car subwoofer - 4ohm DVC - R2SD4-10 10in shallow car subwoofer - 4ohm DVC - R2SD4-10 £110.00 10in shallow car subwoofer - 4ohm DVC - R2SD4-10. 200W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated. Add To Cart Added! 10in shallow car subwoofer - 4ohm DVC - R2SD4-10. 200W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated.