SeaKing Stores › 12in subwoofer - 2ohm DVC - black - M1D2-12B 12in subwoofer - 2ohm DVC - black - M1D2-12B £370.00 12in subwoofer - 2ohm DVC - black - M1D2-12B. M1 Color Optix marine subwoofer with 12 in cone, DVC 2Ω / 300 W RMS / 1,200 W peak; Black grille. Add To Cart Added! 12in subwoofer - 2ohm DVC - black - M1D2-12B. M1 Color Optix marine subwoofer with 12 in cone, DVC 2Ω / 300 W RMS / 1,200 W peak; Black grille.