Click Here to Download 8 ohm PDF Spec Sheet
Click Here to Download 8 ohm PDF Cabinet Design

ALPHA-8A
SPECIFICATION
Nominal Basket Diameter 8", 203.2mm
Nominal Impedance* 8 ohms
Power Rating
Watts 125W
Music Program 250W
Resonance 73Hz
Usable Frequency Range 58Hz-5kHz
Sensitivity*** 94
Magnet Weight 20 oz.
Gap Height 0.25", 6.35mm
Voice Coil Diameter 1.5", 38.1mm

THIELE & SMALL PARAMETERS
Resonant Frequency (fs) 73Hz
DC Resistance (Re) 5.3
Coil Inductance (Le) 0.44mH
Mechanical Q (Qms) 4.6
Electromagnetic Q (Qes) 0.68
Total Q (Qts) 0.59
Compliance Equivalent Volume (Vas) 17.7 liters / 0.6 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 67cc
Mechanical Compliance of Suspension (Cms) 0.28mm/N
BL Product (BL) 7.8 T-M
Diaphram Mass inc. Airload (Mms) 17 grams
Efficiency Bandwidth Product (EBP) 107
Maximum Linear Excursion (Xmax) 3.2mm
Surface Area of Cone (Sd) 210.0 cm2
Maximum Mechanical Limit (Xlim) 7.1mm

MOUNTING INFORMATION
Recommended Enclosure
Sealed 5-7 liters/0.18-0.25 cu.ft.
Vented 16.7-25.5 liters/0.59-0.90 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 3.25", 83mm
Net Weight 4.3 lbs., 1.9 kg
Shipping Weight 5.1 lbs., 2.3 kg

MATERIALS OF CONSTRUCTION
Coil Construction Copper 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