DD Audio 718-D2 18" Redline 700 Series 3600 Watts Subwoofer

SERIOUS PERFORMANCE Overview 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. Any DD Audio Product bearing the Marine Grade logo incorporates water resistant features enabling it to be used in applications where moderate exposure to moisture will not result in damage to the product. Marine Grade products are not waterproof, and submersion or excessive moisture exposure may result in product failure. DD Audio Marine Grade products are not certified for saltwater environments.   Features EROM surround High-temp, 3.0”, voice coil Triple layer Deep bass, high excursion spider system Unique glass fiber and natural pulp cone Back plate coil gap venting Extended pole piece DD cast basket   Specifications MODEL -718-D2 Driver Size 18" Watts RMS 600- 1200 Peak Power 3600 VCD 3 Impedance D2  Piston Dia – in 15 1/2 Fs – Hz 26.92 Qms 6.79 Qes 0.567 Qts 0.5233 Vas – liters 170.4 Xmech – mm 80 Xmax – mm 16 Frame OD – in 18 3/8 Frame OD w/Gasket - in 18 1/2 Mounting Diameter – in 16 5/8 Mounting Depth – in 10 1/2 Motor Diameter – in 7 3/4 Motor Depth – in 3 1/2 Woofer Displacement - cu ft 0.25 Sealed Enclosure - cu ft N/A Ported Enclosure - cu ft 6.0 - 8.0 Shipping Weight – lbs 43