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Eminence ALPHA12A

Price: $59.99
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Recommended for professional audio mid-bass applications in a small sealed or medium vented enclosure.
Nominal Basket Diameter: 12", 304.8mm
Nominal Impedance*: 8 ohms
Power Rating**
Watts: 150W
Music Program: 300W
Resonance: 49Hz
Usable Frequency Range: 51Hz - 4.3kHz
Sensitivity***: 95.6dB
Magnet Weight: 20 oz.
Gap Height: 0.25", 6.35mm
Voice Coil Diameter: 1.5", 38.1mm

Thiele & Small Parameters
Resonant Frequency (fs): 49Hz
DC Resistance (Re): 6.3
Coil Inductance (Le): 0.79mH
Mechanical Q (Qms): 6.53
Electromagnetic Q (Qes): 0.88
Total Q (Qts): 0.77
Compliance Equivalent Volume (Vas): 121.5 liters / 4.3 cu.ft.
Peak Diaphragm Displacement Volume (Vd): 125cc
Mechanical Compliance of Suspension (Cms): 0.32mm/N
BL Product (BL): 8.5 T-M
Diaphragm Mass Inc. Airload (MMs): 33 grams
Efficiency Bandwidth Product (EBP): 56
Maximum Linear Excursion (Xmax): 2.4mm
Surface Area of Cone (Sd): 519.5 cm2
Maximum Mechanical Limit (Xlim): 6.6mm

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 Displaced: 108.9 / 1.78 liters
Overall Diameter: 12.26", 311.4mm
Baffle Hole Diameter: 11", 279.5mm
Front Sealing Gasket: Fitted as standard
Rear Sealing Gasket: Fitted as standard
Mounting Holes Diameter: 0.25", 6.4mm
Mounting Holes B.C.D.: 11.71", 297.5mm
Depth: 4.73", 120mm
Net Weight: 5.3 lbs, 2.4 kg
Shipping Weight: 7.4 lbs, 3.4 kgs

Materials of Construction
Coil Construction: Copper voice coil
Coil Former: Polyimide former
Magnet Composition: Ferrite magnet
Core Details: Vented and extended core
Basket Materials: Pressed steel basket
Cone Composition: Paper Cone
Cone Edge Composition: Cloth cone edge
Dust Cap Composition: Solid composition felt dust cap


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