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Eminence Alpha-12A 12" 8 ohm 150W Midbass Pro Audio Woofer

Eminence Alpha-12A 12" 8 ohm 150W Midbass Pro Audio Woofer
Ship weight
3.36 kg
Priced per:
8 ohm
Specifications Sheet:
Cabinet Design:
Your price:
CDN $100.97
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Recommended for professional audio mid bass applications in a small sealed or medium vented enclosure.

Speaker Detail
Nominal Basket Diameter12", 305 mm
Nominal Impedance*8 Ω
Power Rating*
Program Power300 W
Watts150 W
Resonance49 Hz
Usable Frequency Range51 Hz - 4.3 kHz
Sensitivity*95.6 dB
Magnet Weight20 oz.
Gap Height0.25", 6.4 mm
Voice Coil Diameter1.5", 38 mm
Thiele & Small Parameters
Resonant Frequency (fs)49 Hz
DC Resistance (Re)6.3 Ω
Coil Inductance (Le)0.79m H
Mechanical Q (Qms)6.53
Electromagnetic Q (Qes)0.88
Total Q (Qts)0.77
Compliance Equivalent Volume (Vas)121.5 liters / 4.29 cu.ft.
Peak Diaphragm Displacement Volume (Vd)125 cc
Mechanical Compliance of Suspension (Cms)0.32 mm/N
BL Product (BL)8.5 T-M
Diaphragm Mass Inc. Airload (MMs)33 grams
Efficiency Bandwidth Product (EBP)56
Maximum Linear Excursion (Xmax)2.4 mm
Surface Area of Cone (Sd)519.5 cm2
Maximum Mechanical Limit (Xlim)6.6 mm
Mounting Information
Recommended Enclosure Volume
Sealed 17-22.7 liters / 0.6-0.8 cu.ft.
Vented 56.6-113.3 liters / 2-4 cu.ft.
Driver Volume Displaced0.063 cu.ft. / 1.78 liters
Overall Diameter12.26", 311.4 mm
Baffle Hole Diameter11.06", 280.9 mm
Front Sealing GasketYes
Rear Sealing GasketYes
Mounting Holes Diameter0.25", 6.4mm
Mounting Holes B.C.D.11.71", 297.4mm
Depth4.73", 120.1 mm
Net Weight5.3 lbs, 2.4 kg
Shipping Weight7.4 lbs, 3.36 kgs
Materials of Construction
Coil ConstructionCopper voice coil
Coil FormerPolyimide former
Magnet CompositionFerrite magnet
Core DetailsVented and extended core
Basket MaterialsPressed steel basket
Cone CompositionPaper cone
Cone Edge CompositionCloth cone edge
Dust Cap CompositionSolid composition felt dust cap
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