SeaKing Stores › 12in infinite-baffle subwoofer - 4ohm DVC - white - M2D4-12I 12in infinite-baffle subwoofer - 4ohm DVC - white - M2D4-12I £495.00 12in infinite-baffle subwoofer - 4ohm DVC - white - M2D4-12I. M2 premium Color Optix marine subwoofer for infinite-baffle mounting. 12 in; DVC 4Ω / 400 W RMS / 1,600 W peak; White grille. Add To Cart Added! 12in infinite-baffle subwoofer - 4ohm DVC - white - M2D4-12I. M2 premium Color Optix marine subwoofer for infinite-baffle mounting. 12 in; DVC 4Ω / 400 W RMS / 1,600 W peak; White grille.