DD Audio 9518 18" 8000W Subwoofer

Features:

• EROM
• Non-Pressed Paper Cones
• SFB
• DD Spiders
• Laminated Spiders
• Laminated Leads
• High-Temp Aluminum Former Voice Coils
• Aluminum Shorting Ring
• Free Flow
• Back Plate Coil Gap Venting
• DD Cast Baskets
• Direct Connect

Specifications:

• Driver Size: 18"
• Watts RMS: 1000 – 2000
• Peak Power: 8000
• VCD: 3.35
• Impedance: D1/D2
• Piston Dia: in 15 1/2
• Fs: Hz 36.34
• Qms: 8.259
• Qes: 0.726
• Qts: 0.667
• Vas: liters 106.018
• Xmech: mm 100
• Xmax: mm 22
• Frame OD: in 18 1/4
• Frame OD w/Gasket: in 18 7/16
• Mounting Diameter: in 16 5/8
• Mounting Depth:in 10 11/16
• Motor Diameter: in 9 5/16
• Motor Depth: in 4 5/8
• Woofer Displacement: cu ft 0.41
• Sealed Enclosure:cu ft N/A
• Ported Enclosure: cu ft 5.0 - 6.0
• Shipping Weight: lbs 77