NEW! NICE VINTAGE STYLE 15" SPEAKER. GOOD FOR B15N, B15S, B15R AND MANY OTHERS. SPECIFICATION Nominal Basket Diameter 15", 381mm Nominal Impedance* 8 ohms Power Rating Watts 300W Music Program 600W Resonance 34Hz Usable Frequency Range 47Hz-3kHz Sensitivity*** 98 Magnet Weight 80 oz. Gap Height 0.375", 9.53mm Voice Coil Diameter 2.5", 63.5mm THIELE & SMALL PARAMETERS Resonant Frequency (fs) 34Hz DC Resistance (Re) 6.15 Coil Inductance (Le) 0.33mH Download PDF Spec Sheet Mechanical Q (Qms) 5.9 Electromagnetic Q (Qes) 0.36 Total Q (Qts) 0.34 Compliance Equivalent Volume (Vas) 336 liters / 11.9 cu.ft. Mechanical Compliance of Suspension (Cms) 0.31mm/N BL Product (BL) 16.0 T-M Diaphram Mass inc. Airload (Mms) 70 grams Efficiency Bandwidth Product (EBP) 95 Maximum Linear Excursion (Xmax) 4.8mm Surface Area of Cone (Sd) 856.3 cm2 Maximum Mechanical Limit (Xlim) 9.5mm MOUNTING INFORMATION Recommended Enclosure Sealed 54-65 liters/ 1.9-2.3 cu.ft. Vented 54-159 liters/ 1.9-5.6 cu.ft. Overall Diameter 15.21", 386.4mm Baffle Hole Diameter 14.0", 355.3mm Front Sealing Gasket Fitted as standard Rear Sealing Gasket Fitted as standard Mounting Holes Diameter 0.28", 7.1mm Mounting Holes B.C. D. 14.56", 369.9mm Depth 6.5", 165mm Net Weight 17.3 lbs., 7.9 kg Shipping Weight 19.4 lbs., 8.8 kg