Eminence BETA-8A Midrange 8″ Speaker

SPECIFICATION Nominal Basket Diameter 8″, 203 mm Nominal Impedance* 8 Ω Power Rating* Program Power 450 W Watts 225 W Resonance 65 Hz Usable Frequency Range 78 Hz – 4.5 kHz Sensitivity* 95.1 dB Magnet Weight 34 oz. Gap Height 0.312″, 7.9 mm Voice Coil Diameter 2″, 51 mm THIELE & SMALL PARAMETERS Resonant Frequency (fs) 65 Hz DC Resistance (Re) 5.99 Ω Coil Inductance (Le) 0.49m H 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) 63 cc Mechanical Compliance of Suspension (Cms) 0.37 mm/N BL Product (BL) 9.6 T-M Diaphragm Mass Inc. Airload (MMs) 16 grams Efficiency Bandwidth Product (EBP) 156 Maximum Linear Excursion (Xmax) 3 mm Surface Area of Cone (Sd) 210 cm2 Maximum Mechanical Limit (Xlim) 7.4 mm MOUNTING INFORMATION Recommended Enclosure Volume Sealed 5.7-9.9 liters / 0.2-0.35 cu.ft. Vented 8.5-19 liters / 0.3-0.67 cu.ft. Driver Volume Displaced 0.027 cu.ft. / 0.76 liters Overall Diameter 8.24″, 209.3 mm Baffle Hole Diameter 7.13″, 181.1 mm Front Sealing Gasket Yes Rear Sealing Gasket Yes Mounting Holes Diameter 0.22″, 5.6mm Mounting Holes B.C.D. 7.75″, 196.9mm Depth 3.5″, 88.9 mm Net Weight 6.6 lbs, 2.99 kg Shipping Weight 7.4 lbs, 3.36 kgs MATERIALS OF CONSTRUCTION Coil Construction Aluminum voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented core Basket Materials Pressed steel basket Cone Composition Paper cone Cone Edge Composition Cloth cone edge Dust Cap Composition Solid composition paper dust cap