Power Rating Watts 200W Music Program 400W Resonance 326.38Hz Usable Frequency Range 300Hz - 4kHz Sensitivity 99.6dB Magnet Weight 34 ounce Gap Height 0.31", 7.95mm Voice Coil Diameter 2", 50.8mm THIELE and SMALL PARAMETERS Resonant Frequency (FS) 326.38Hz DC Resistance (Re) 5.68 Coil Inductance (Le) 0.48mH Mechanical Q (QMS) 7.14 Electromagnetic Q (QES) 2.27 Total Q (QTS) 1.73 Compliance Equivalent Volume (Vas) 1.7 liters / 0.06 cu.ft. Peak Diaphragm Displacement Volume (VD) 52.52cc Mechanical Compliance of Suspension (CMS) 0.01mm/N BL Product (BL) 9.5 T-M Diaphragm Mass Inc. Air load (MMs) 17.62 grams Efficiency Bandwidth Product (EBP) 143.4 Maximum Linear Excursion (XMAX) 1.5mm Surface Area of Cone (SD) 350.1 cm2 Maximum Mechanical Limit (XLIM) 3mm MOUNTING INFORMATION Recommended Enclosure Volume Sealed - liters / - cu.ft. Vented - liters / - cu.ft. Driver Volume Displaced 69.1 cu.in. / 1.1 liters Overall Diameter 10.09", 256.29mm Baffle Hole Diameter 9.18", 233.17mm Front Sealing Gasket Fitted as standard Rear Sealing Gasket Fitted as standard Mounting Holes Diameter 0.25", 6.35mm Mounting Holes B.C.D. 9.66", 245.36mm Depth 3.56", 90.42mm Net Weight 7.3 lbs., 3.31 kg Shipping Weight 8.3 lbs., 3.76 kilos MATERIALS OF CONSTRUCTION Coil Construction Aluminum voice coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Non-Vented core Basket Materials Pressed steel basket Cone Composition Paper cone Edge Composition Cloth cone edge Dust Cap Composition Solid composition paper dust cap