DD Audio DD-712D-D4 12" 3600 Watts 700 Series Power Tuned Subwoofer cabin filter controlled bass output within the

controlled bass output within the sealed shallow enclosure alignment it is designed for

Speed Triple

Application: Midrange / Midbass

What does the "C" in the SKU mean

DD Audio DD-712D-D4 12" 3600 Watts 700 Series Power Tuned Subwoofer cabin filter controlled bass output within theHand Built with the Same High Energy Design Philosophy as their Hi Def & Power Tuned Subwoofers! 700 Series Power Tuned Subwoofer The 700 series is designed for serious performance. It features a DD cast basket supporting a triple stack magnet motor, heavy duty suspension, and a high strength cone coupled to a massive EROM surround, making them best suited for duty in vented or multi order enclosures. DD Audio Marine Grade products are not certified