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BETA-8A
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*** 95.1
Magnet Weight 34 oz.
Gap Height 0.312", 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
Diaphram Mass inc. Airload (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
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
Dustcap Composition Solid composition paper dust cap