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Eminence BETA8A

Price: $64.99
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Recommended for professional audio mid-bass applications or as a woofer in vented enclosures. Also suitable as a mid-bass speaker in sealed enclosures.
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): 16 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 / 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


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