Eminence American Standard Beta-8A 8" Pro Audio Speaker, 225 Watts at 8 Ohms, Black

Power Rating Watts 225W Music Program 450W Resonance 65Hz Usable Frequency Range 78Hz-4.5kHz Sensitivity 95.1 Magnet Weight 34 ounce Gap Height 0.312", 7.92mm Voice Coil Diameter 2", 50.8mm THIELE and SMALL PARAMETERS Resonant Frequency (FS) 65Hz DC Resistance (Re) 5.99 Coil Inductance (Le) 0.49mH Mechanical Q (QMS) 4.95 Electromagnetic Q (QES) 0.42 Total Q (QTS) 0.38 Compliance Equivalent Volume (Vas) 23.3 liters / 0.82 cu.ft. Peak Diaphragm Displacement Volume (VD) 63cc Mechanical Compliance of Suspension (CMS) 0.37mm/N BL Product (BL) 9.6 T-M Diaphragm Mass Inc. Air load (Mms) 16 grams Efficiency Bandwidth Product (EBP) 156 Maximum Linear Excursion (XMAX) 3.0mm Surface Area of Cone (SD) 210.0 cm2 Maximum Mechanical Limit (XLIM) 7.4mm MOUNTING INFORMATION Recommended Enclosure Sealed 5.7-9.9 liters/0.2-0.35 cu.ft. Vented 8.5-19 liters/0.3-0.67 cu.ft. Overall Diameter 8.24", 209.2mm Baffle Hole Diameter 7.13", 181mm Front Sealing Gasket fitted as standard Rear Sealing Gasket fitted as standard Mounting Holes Diameter 0.22", 5.5mm Mounting Holes B.C. D. 7.75", 196.9mm Depth 3.5", 89mm Net Weight 6.6 lbs., 3 kg Shipping Weight 7.4 lbs., 3.4 kg MATERIALS OF CONSTRUCTION Coil Construction Aluminum voice coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented core Basket Materials Pressed steel basket Cone Composition Paper Cone Edge Composition Cloth cone edge Dust cap Composition Solid composition paper dust cap