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Manufacturer Part Number: 290-401
Overview: Eminence's Alpha-8A 8" professional speaker features high efficiency, excellent power handling, and extended frequency response.
Kapton coil former
Polyamide-imide coated copper voice coil
Pressed steel basket
Cloth accordian surround
Solid composition paper dust cap
Product Details: Eminence Alpha-8A 8" PA Driver
The stamped-steel frame Eminence Alpha-8A 8" PA Driver is an ideal woofer for small P.A. and club speaker systems, as well as keyboard or guitar amplifier combos. Made in the USA. 7-year manufacturer's warranty!
Nominal Diameter: 8"
Power Handling (RMS): 125 Watts
Power Handling (max): 250 Watts
Impedance: 8 ohms
Frequency Response: 58 to 5,000 Hz
Sensitivity: 94 dB 1W/1m
Voice Coil Diameter: 1.5"
Magnet Weight: 20 oz.
Resonant Frequency (Fs): 73 Hz
DC Resistance (Re): 5.3 ohms
Voice Coil Inductance (Le): 0.44 mH
Mechanical Q (Qms): 4.6
Electromagnetic Q (Qes): 0.68
Total Q (Qts): 0.59
Compliance Equivalent Volume (Vas): 0.6 ft.?
Mechanical Compliance of Suspension (Cms): 0.28 mm/N
BL Product (BL): 7.8 Tm
Diaphragm Mass Inc. Airload (Mms): 17g
Maximum Linear Excursion (Xmax): 3.2 mm
Surface Area of Cone (Sd): 210 cm²
Materials of Construction
Cone Material: Paper
Surround Material: Cloth
Voice Coil Wire Material: Copper
Voice Coil Former: Kapton® / Polyimide
Basket / Frame Material: Steel
Magnet Material: Ferrite
Overall Outside Diameter: 8.24"
Baffle Cutout Diameter: 7.13"
# Mounting Holes: 8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
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