Watts 150W Music Program 300W (when proper midrange crossover is used) Resonance 460Hz Usable Frequency Range 500Hz-5.4kHz Sensitivity 97.8 Magnet Weight 38 ounce Gap Height 0.31", 7.92mm Voice Coil Diameter 1.5", 38.1mm THIELE and SMALL PARAMETERS Resonant Frequency (FS) 460Hz DC Resistance (Re) 6.3 Coil Inductance (Le) 0.33mH Mechanical Q (QMS) 3.13 Electromagnetic Q (QES) 1.24 Total Q (QTS) 0.89 Compliance Equivalent Volume (Vas) 0.4 liters / 0.01 cu.ft. Peak Diaphragm Displacement Volume (VD) 2.7cc Mechanical Compliance of Suspension (CMS) 0.01mm/N BL Product (BL) 11.1 T-M Diaphragm Mass Inc. Air load (Mms) 9 grams Efficiency Bandwidth Product (EBP) 371 Maximum Linear Excursion (XMAX) 0.2mm Surface Area of Cone (SD) 133.1 cm2 Maximum Mechanical Limit (XLIM) 0.8mm MOUNTING INFORMATION Recommended Enclosure Sealed Vented Overall Diameter 6.59", 167mm/Width across flats: 6", 152mm Baffle Hole Diameter 5.65", 143.5mm Front Sealing Gasket fitted as standard Rear Sealing Gasket Mounting Holes Diameter 0.23", 5.7mm Mounting Holes B.C. D. 6.06", 154mm Depth 2.77", 70mm Net Weight 6.7 lbs., 3 kg Shipping Weight 7.2 lbs., 3.3 kg MATERIALS OF CONSTRUCTION Coil Construction Copper voice coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented and extended core Basket Materials Pressed steel basket with truncated sides Cone Composition Paper Cone Edge Composition Cloth cone edge Dust cap Composition Solid composition paper dust cap