SeaKing Stores › 10in car subwoofer - 4ohm DVC - T1D4-10 10in car subwoofer - 4ohm DVC - T1D4-10 £400.00 10in car subwoofer - 4ohm DVC - T1D4-10. 600W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated. Add To Cart Added! 10in car subwoofer - 4ohm DVC - T1D4-10. 600W RMS. Standalone driver, sold individually. Car-audio product; not marine-rated.