... '' car subwoofer 2. Dual 4 ohm 3. 65.5mm Voice Coil 4. Max Power : 450W + 450W 12'' Car Subwoofer , Die-Cast Frame Car Subwoofer ... , Car Audio Subwoofer 12'' Car Subwoofer Rubber edge , Die- cast frame Nominal Impedance : dual 4 ΩFo ... .5mm TSV 4 Layer Max. Power : 450W + 450W 12'' Car Subwoofer , Die-Cast Frame Car Subwoofer , Car Audio ...