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Pro Audio ProductsSpeakersRaw Frame Speakers → Eminence ALPHA-12A 12"
Eminence ALPHA-12A 12"

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Dimensions: 12.0"x12.0"x6.0"
Weight: 7.00
MSRP: $59.99
 Farralane Price: $49.99
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ALPHA-12A    
SPECIFICATION

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*** 95.6
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
Diaphram 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    
Sealed 17-22.7 liters/0.6-0.8 cu.ft.  
Vented 56.6-113.3 liters/2-4 cu.ft.  
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 kg  
     
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  
Dustcap Composition Solid composition felt dust cap  
   


 
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