The Eminence Red Fang 10" guitar speaker defines the British Invasion. Vintage tone with loads of detail, chime and grit and a nicely defined low end. You'll swear they're coming again. Specification Nominal Basket Diameter 10", 254mm Nominal Impedance* 8 ohms Power Rating** Watts 50W Music Program N/A Resonance 111Hz Usable Frequency Range 70Hz - 4.5kHz Sensitivity*** 102.1dB Magnet Weight 35 oz. Gap Height 0.31", 7.92mm Voice Coil Diameter 1.75", 44.5mm Thiele & Small Parameters Resonant Frequency (fs) 111Hz DC Resistance (Re) 5.8 Coil Inductance (Le) 0.55mH Mechanical Q (Qms) 12.64 Electromagnetic Q (Qes) 0.5 Total Q (Qts) 0.48 Compliance Equivalent Volume (Vas) 21.28 liters / 0.75 cu.ft. Peak Diaphragm Displacement Volume (Vd) 17cc Mechanical Compliance of Suspension (Cms) 0.11mm/N BL Product (BL) 12.11 T-M Diaphragm Mass Inc. Airload (MMs) 18.07 grams Efficiency Bandwidth Product (EBP) 223 Maximum Linear Excursion (Xmax) 0.47mm Surface Area of Cone (Sd) 366.1 cm2 Maximum Mechanical Limit (Xlim) N/A Mounting Information Recommended Enclosure Volume Sealed Acceptable Vented Acceptable Driver Volume Displaced 86 cu.in. / 1.41 liters Overall Diameter 10.11", 256.8mm Baffle Hole Diameter 9.13", 231.9mm Front Sealing Gasket Fitted as standard Rear Sealing Gasket Fitted as standard Mounting Holes Diameter 0.23", 5.72mm Mounting Holes B.C.D. 9.6", 243.8mm Depth 5.2", 132mm Net Weight 7.7 lbs, 3.5 kg Shipping Weight 8.5 lbs, 3.9 kgs Materials of Construction Coil Construction Copper voice coil Coil Former Nomex former Magnet Composition Alnico magnet Core Details Non-vented core Basket Materials Pressed steel basket Cone Composition Paper cone Cone Edge Composition Paper cone edge Dust Cap Composition Zurette dust cap