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Eminence Black Powder 12" Guitar Speaker
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Eminence Black Powder 12" Patriot Guitar Speaker The Eminence Black Powder offers a raw & bright sound with tight bass and explosive mids & highs BLACK POWDERâ„¢   SPECIFICATION   Nominal Basket Diameter 12 , 304.8mm Nominal Impedance* 8 ohms Power Rating   Watts 75W Music Program Resonance 72Hz Usable Frequency Range 70Hz-5kHz Sensitivity*** 100 Magnet Weight 30 oz. Gap Height 0.312 , 7.92mm Voice Coil Diameter 1.5 , 38.1mm     THIELE & SMALL PARAMETERS   Resonant Frequency (fs) 72Hz DC Resistance (Re) 7.1 Coil Inductance (Le) 0.37mH Mechanical Q (Qms) 14.98 Electromagnetic Q (Qes) 0.75 Total Q (Qts) 0.72 Compliance Equivalent Volume (Vas) 82.4 liters / 2.9 cu. ft. Peak Diaphragm Displacement Volume (Vd) 25cc Mechanical Compliance of Suspension (Cms) 0.22mm/N BL Product (BL) 9.9 T-M Diaphram Mass inc. Airload (Mms) 23 grams Efficiency Bandwidth Product (EBP) 96 Maximum Linear Excursion (Xmax) 0.5mm Surface Area of Cone (Sd) 519.5 cm2 Maximum Mechanical Limit (Xlim)     MOUNTING INFORMATION   Recommended Enclosure   Sealed Vented Acceptable Overall Diameter 12.23 , 310.5mm Baffle Hole Diameter 11.02 , 279.8mm Front Sealing Gasket fitted as standard Rear Sealing Gasket fitted as standard Mounting Holes Diameter 0.25 , 6.4mm Mounting Holes B.C. D. 11.67 , 296.4mm Depth 4.6 , 117mm Net Weight 7 lbs., 3.2 kg Shipping Weight 9 lbs., 4.1 kg     MATERIALS OF CONSTRUCTION   Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Non-vented core Basket Materials Pressed steel basket Cone Composition Paper Cone Cone Edge Composition Paper cone edge Dustcap Composition Zurette dust cap