Nominal Specifications Nominal Diameter 15", 380 mm Overall Diameter 15.47", 393 mm Bolt Circle Diameter 14.72", 374 mm Baffle Cutout Diameter 13.94", 354 mm Depth 7.14", 181.3 mm Flange and Gasket Thickness 0.54", 13.7 mm Electrical Specifications Minimum Impedance 6.9 Ohm Nominal Impedance 8 Ohm Nominal Power Handling*** 700 W Maximum Power Handling**** 1, 400 W Sensitivity (1W/1m) 99 dB Frequency Range 40 - 3150 Hz Voice Coil Diameter 4", 100 mm Winding Material Aluminium Former Material Glass Fiber Winding Depth 0.9", 23 mm Magnetic Gap Depth 0.47", 12 mm Flux Density 1.3 T THIELE & SMALL Parameters Resonant Frequency (fs) 40 Hz DC Resistance (Re) 5.5 Ohm BL Product (BL) 24.2 N/A Diaphragm Mass inc. Airload (Mms) 118 grams Mechanical Compliance of Suspension (Cms) 0.13 mm/N Rms 2.69 Kg/s Electromagnetic Q (Qes) 0.28 Mechanical Q (Qms) 10.20 Total Q (Qts) 0.27 Compliance Equivalent Volume (Vas) 3.85 ft³, 109 dm³ Surface Area of Cone (Sd) 117.2"², 756.2 cm² Maximum Linear Excursion (Xmax)* 9.5 mm Xdamage** 16 mm Coil Inductance (Le) 1.2 mH Diaphragm mass (Mmd) 106.2 g Eta Zero 2.43 % Notes *Xmax = [(winding depth - magnetic gap depth) / 2] + (magnetic gap depth / 3) **Maximum excursion before permanent damage ***2 Hours Test According to AES 2-1984 Rev. 2003 ****Maximum power is defined as 3dB greater than nominal power