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Eminence Beta-8A 8" Mid-Range Speaker, 8 Ohm
USD 99.99
Performance Audio
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8" Midrange/Mid-Bass Driver, 8 Ohm, 225 Watt The Eminence Beta-8A 8" Midrange/PA Driver's performance is optimized for midrange use between 400 Hz and 4 kHz in multiway systems. Th
e Beta-8A is also suitable for vocal PA, keyboards, stage monitors, and bass guitar.Features: Kapton coil former Polyamide-imide coated copper voice coil Ferrite magnet Pressed steel basket Paper cone Cloth accordian surround Solid composition paper dust cap Specifications: SPECIFICATION Nominal Basket Diameter: 8", 203.2mm Nominal Impedance*: 8 ohms Power Rating** Watts: 225W Music Program: 450W Resonance: 65Hz Usable Frequency Range: 78Hz - 4.5kHz Sensitivity***: 95.1dB Magnet Weight: 34 oz. Gap Height: 0.31", 7.92mm Voice Coil Diameter: 2", 50.8mm THIELE & 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. Airload (MMs): 15.8 grams Efficiency Bandwidth Product (EBP): 156 Maximum Linear Excursion (Xmax): 3mm Surface Area of Cone (Sd): 210 cm2 Maximum Mechanical Limit (Xlim): 7.4mm 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: 46.3 cu.in. / 0.76 liters 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 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
