FEATURES:SPECIFICATION [ Nominal Basket Diameter 15"", 381mm [ Nominal Impedance* 8 ohms [ Power Rating: Watts 450; Music Program: 900 Watt[ Resonance: 33Hz [ Usable Frequency Range: 52Hz-2.3kHz [ Sensitivity: 100.5[ Magnet Weight: 80 oz. [ Gap Height 0.375"", 9.53mm [ Voice Coil Diameter 3"", 76.2mm THIELE & SMALL PARAMETERS [ Resonant Frequency (fs): 33Hz [ DC Resistance (Re): 5.22 [ Coil Inductance (Le): 1.05mH [ Mechanical Q (Qms): 8.90[ Electromagnetic Q (Qes): 0.33[ Total Q (Qts) 0.32[ Compliance Equivalent Volume (Vas): 278 liters / 11.35 cu. ft.[ Peak Diaphragm Displacement Volume (Vd): 131cc [ Mechanical Compliance of Suspension (Cms): 0.27mm/N [ BL Product (BL): 16.7 T-M [ Diaphragm Mass inc. Airload (Mms): 74 grams [ Efficiency Bandwidth Product (EBP): 161 [ Maximum Linear Excursion (Xmax) 31.6mm [ Surface Area of Cone (Sd): 823.7 cm² [ Maximum Mechanical Limit (Xlim): 11.6mm MOUNTING INFORMATION [ Recommended Enclosure: Sealed: /Vented: 64-06 liters/1.2-2.2 cu.ft.[ Overall Diameter: 15.16"", 384.9mm[ Baffle Hole Diameter: 13.77"", 349.6mm[ Front Sealing Gasket: fitted as standard [ Rear Sealing Gasket: fitted as standard [ Mounting Holes Diameter: 0.25"", 6.4mm[ Mounting Holes B.C. D.: 14.56"", 369.9mm[ Depth: 6.13"", 156mm[ Net Weight: 17.6 lbs., 8 kg[ Shipping Weight: 19.8 lbs., 9 kg MATERIALS OF CONSTRUCTION [ Coil Construction: Aluminium voice coil [ Coil Former: Polyimide former [ Magnet Composition: Ferrite magnet [ Core Details: Vented core [ Basket Materials: Pressed steel basket[ Cone Composition Paper Cone [ Cone Edge Composition: Cloth cone edge [ Dustcap Composition: Solid composition paper dust cap ";
