Eminence Alpha 2 - 8 ohm 2" Fullrange Line Array Speaker (Single)

SKU: 587-011

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Ideal for tight fitting column and line array applications, the Alpha 2 features a 0.64" copper voice coil and 2.7 oz. ferrite magnet. With under spider venting and a flux source cap, this 8 ohm driver lets the heat out while containing the magnetic flux, which is critical for multi-unit designs packed tightly together. Rated at 30 watts program power, the Alpha 2 has a wide usable frequency range of 200 Hz – 20 kHz.

Manufacturer Spec Sheet

Example Cabinet Designs


Nominal Basket Diameter 2", 51 mm
Nominal Impedance* 8 Ω
Power Rating*
Program Power 30 W
Watts 20 W
Resonance 186 Hz
Usable Frequency Range 200 Hz - 20 kHz
Sensitivity* 83.8 dB
Magnet Weight 3 oz.
Gap Height 0.12", 3.1 mm
Voice Coil Diameter 0.64", 16 mm

T/S Parameters

Resonant Frequency (fs) 186 Hz
DC Resistance (Re) 6.4 Ω
Coil Inductance (Le) 0.13m H
Mechanical Q (Qms) 3.06
Electromagnetic Q (Qes) 0.94
Total Q (Qts) 0.72
Compliance Equivalent Volume (Vas) 0.18 liters / 0.01 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 2.1 cc
Mechanical Compliance of Suspension (Cms) 0.84 mm/N
BL Product (BL) 2.64 T-M
Diaphragm Mass Inc. Airload (MMs) 1 grams
Efficiency Bandwidth Product (EBP) 198
Maximum Linear Excursion (Xmax) 1.7 mm
Surface Area of Cone (Sd) 12.37 cm2
Maximum Mechanical Limit (Xlim) 2.2 mm


Recommended Enclosure Volume
Sealed 0.42-0.54 liters / .015-.019 cu.ft.
Vented 0.37-0.57 liters / .013-.02 cu.ft.
Driver Volume Displaced 0.001 cu.ft. / 0.03 liters
Overall Diameter 2.75", 69.9 mm
Baffle Hole Diameter 2", 50.8 mm
Front Sealing Gasket Yes
Rear Sealing Gasket N/A
Mounting Holes Diameter 0.15", 3.8mm
Mounting Holes B.C.D. 2.36", 50.8mm
Depth 1.63", 41.4 mm
Net Weight 0.4 lbs, 0.18 kg
Shipping Weight 2 lbs, 0.91 kgs


Coil Construction Copper
Coil Former Polyimide 
Magnet Composition Ferrite 
Core Details Solid with flux source cap
Basket Materials Pressed Steel
Cone Composition Paper/Poly Sandwich
Cone Edge Composition Cloth
Dust Cap Composition Poly

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