Authentic Eminence Beta-8A 8" 225 Watt RMS 8 Ohm Mid-Bass Speaker

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Nominal Basket Diameter: 8", 203 mm<br>Nominal Impedance*: 8 Ω<br>Power Rating**<br>Watts: 225 W<br>Music Program: 450 W<br>Resonance: 65 Hz<br>Usable Frequency Range: 78 Hz - 4.5 kHz<br>Sensitivity***: 95.1 dB<br>Magnet Weight: 34 oz.<br>Gap Height: 0.312", 7.9 mm<br>Voice Coil Diameter: 2", 51 mm<br>Thiele & Small Parameters<br>Resonant Frequency (fs): 65 Hz<br>DC Resistance (Re): 5.99 Ω<br>Coil Inductance (Le): 0.49m H<br>Mechanical Q (Qms): 4.95<br>Electromagnetic Q (Qes): 0.42<br>Total Q (Qts): 0.38<br>Compliance Equivalent Volume (Vas): 23.3 liters / 0.82 cu.ft.<br>Peak Diaphragm Displacement Volume (Vd): 63 cc<br>Mechanical Compliance of Suspension (Cms): 0.37 mm/N<br>BL Product (BL): 9.6 T-M<br>Diaphragm Mass Inc. Airload (MMs): 16 grams<br>Efficiency Bandwidth Product (EBP): 156<br>Maximum Linear Excursion (Xmax): 3 mm<br>Surface Area of Cone (Sd): 210 cm2<br>Maximum Mechanical Limit (Xlim): 7.4 mm.<br>Mounting Information<br>Recommended Enclosure Volume<br>Sealed: 5.7-9.9 liters / 0.2-0.35 cu.ft.<br>Vented: 8.5-19 liters / 0.3-0.67 cu.ft.<br>Driver Volume Displaced: 0.027 cu.ft. / 0.76 liters<br>Overall Diameter: 8.24", 209.3 mm<br>Baffle Hole Diameter: 7.13", 181.1 mm<br>Front Sealing Gasket: Yes<br>Rear Sealing Gasket: Yes<br>Mounting Holes Diameter: 0.22", 5.6mm<br>Mounting Holes B.C.D.: 7.75", 196.9mm<br>Depth: 3.5", 88.9 mm<br>Net Weight: 6.6 lbs, 2.99 kg<br>Shipping Weight: 7.4 lbs, 3.36 kgs<br>Materials of Construction<br>Coil Construction: Aluminum voice coil<br>Coil Former: Polyimide former<br>Magnet Composition: Ferrite magnet<br>Core Details: Vented core<br>Basket Materials: Pressed steel basket<br>Cone Composition: Paper cone<br>Cone Edge Composition: Cloth cone edge<br>Dust Cap Composition: Solid composition paper dust cap<br>