DD Audio 9921 21" 10000W 9900 Series VCS 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: 21"
• Watts RMS: 1500 - 2500
• Peak Power: 10000
• VCD: 4
• Impedance: D1 / D2
• Piston Dia: in 18 1/4
• Fs: Hz 26.24
• Qms: 5.265
• Qes: 0.517
• Qts: 0.471
• Vas liters: 161.9
• dBSPL: 89.42
• Xmech: mm 92
• Xmax: mm 22
• Frame OD: in 21 5/16
• Frame OD w/Gasket: N/a
• Mounting Diameter: in 19 1/4
• Mounting Depth: in 11 5/16
• Motor Diameter: in 10 5/16
• Motor Depth: in 4 9/16
• Woofer Displacement: cu ft 0.55
• Sealed Enclosure: cu ft N/a
• Ported Enclosure: cu ft 6.0 - 8.0
• Shipping Weight: lbs 92