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Pro Audio ProductsSpeakersRaw Frame Speakers → Eminence ALPHA-15A 15"
Eminence ALPHA-15A 15"

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Dimensions: 15.0"x15.0"x6.0"
Weight: 8.00
MSRP: $69.99
 Farralane Price: $59.99
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ALPHA-15A    
SPECIFICATION
Nominal Basket Diameter 15", 381mm
Nominal Impedance* 8 ohms
Power Rating  
Watts 200W
Music Program 400W
Resonance 41Hz
Usable Frequency Range 46Hz-3.5kHz
Sensitivity*** 97
Magnet Weight 25 oz.
Gap Height 0.25", 6.35mm
Voice Coil Diameter 1.5", 38.1mm

THIELE & SMALL PARAMETERS  
Resonant Frequency (fs) 41Hz
DC Resistance (Re) 5.88
Coil Inductance (Le) 0.84mH
Mechanical Q (Qms) 7.23
Electromagnetic Q (Qes) 1.53
Total Q (Qts) 1.26
Compliance Equivalent Volume (Vas) 260.0 liters / 9.2 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 325cc
Mechanical Compliance of Suspension (Cms) 0.25mm/N
BL Product (BL) 7.7 T-M
Diaphram Mass inc. Airload (Mms) 59 grams
Efficiency Bandwidth Product (EBP) 27
Maximum Linear Excursion (Xmax) 3.8mm
Surface Area of Cone (Sd) 856.3 cm2  
Maximum Mechanical Limit (Xlim) 8.4mm  
     
MOUNTING INFORMATION    
Recommended Enclosure    
Sealed 71-85 liters/2.5-3 cu.ft.  
Vented 106-177 liters/3.75-6.25 cu.ft.  
Overall Diameter 15.15", 384.8mm  
Baffle Hole Diameter 13.77", 349.6mm  
Front Sealing Gasket fitted as standard  
Rear Sealing Gasket fitted as standard  
Mounting Holes Diameter 0.25", 6.4mm  
Mounting Holes B.C. D. 14.56", 369.9mm  
Depth 5.83", 148mm  
Net Weight 6.7 lbs., 3 kg  
Shipping Weight 8.8 lbs., 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 paper dust cap  
   


 
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