DD Audio 9921a D1

Speaker Size (In): 21 Watts RMS: 1500 - 2500 Watts Peak: 10000 Impedance: D1 VCD (In): 4 Piston Diameter (In): 18.25 Fs (Hz): 26.24 Qms: 5.265 Qes: 0.517 Qts: 0.471 Vas (Liters): 161.9 Xmech (MM): 92 Xmax (MM): 22 Frame OD (In): 21.3125 Frame OD w/Gasket (In): 21.3125 Mounting Diameter (In): 19.25 Mounting Depth (In): 11.3125 Motor Diameter (In): 10.3125 Motor Depth (In): 4.5625 Woofer Displacement (CuFt): 0.55 Ported Enclosure (CuFt): 6.0 - 8.0 Shipping Weight (Lbs): 92