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Eminence - ALPHA 5-8


The Alpha 5 offers unmistakable performance with an emphasis on value. Rated at 250 watts program power, this 5" midbass features a water-resistant cone and dust cap, making it an excellent choice for line array or column array applications.

Nominal Basket Diameter 5", 127 mm
Nominal Impedance* 8 ?
Power Rating*
Program Power 250 W
Watts 125 W
Resonance 87 Hz
Usable Frequency Range 87 Hz - 3.5 kHz
Sensitivity* 89.4 dB
Magnet Weight 20 oz.
Gap Height 0.23", 5.8 mm
Voice Coil Diameter 1.5", 38 mm
Resonant Frequency (fs) 87 Hz
DC Resistance (Re) 5 ?
Coil Inductance (Le) 0.29m H
Mechanical Q (Qms) 11.81
Electromagnetic Q (Qes) 0.56
Total Q (Qts) 0.54
Compliance Equivalent Volume (Vas) 6.14 liters / 0.22 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 60.8 cc
Mechanical Compliance of Suspension (Cms) 0.42 mm/N
BL Product (BL) 6.22 T-M
Diaphragm Mass Inc. Airload (MMs) 8 grams
Efficiency Bandwidth Product (EBP) 155
Maximum Linear Excursion (Xmax) 5.92 mm
Surface Area of Cone (Sd) 102.6 cm2
Maximum Mechanical Limit (Xlim) 6.4 mm
Recommended Enclosure Volume
Sealed Acceptable
Vented Acceptable
Driver Volume Displaced 1.091 cu.ft. / 30.9 liters
Overall Diameter 5.87", 149.1 mm
Baffle Hole Diameter 4.8", 121.9 mm
Front Sealing Gasket Yes
Rear Sealing Gasket Yes
Mounting Holes Diameter 0.2", 5mm
Mounting Holes B.C.D. 5.39", 136.9mm
Depth 2.91", 73.9 mm
Net Weight 3.1 lbs, 1.41 kg
Shipping Weight 3.5 lbs, 1.59 kgs
Coil Construction Aluminum voice coil
Coil Former Polyimide former
Magnet Composition Ferrite magnet
Core Details Vented core

Basket Materials Pressed steel basket
Cone Composition Water resistant pulp
Cone Edge Composition Cloth cone edge
Dust Cap Composition Water resistant paper