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Professional AudioSpeakersRaw Frame Speakers → Eminence BETA-12CX 12"
Eminence BETA-12CX 12"

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BETA-12CX    
SPECIFICATION
Nominal Basket Diameter 12", 304.8mm
Nominal Impedance* 8 ohms
Power Rating  
Watts 250W
Music Program 500W
Resonance 43Hz
Usable Frequency Range 66Hz-20kHz*
Sensitivity*** 96.7
Magnet Weight 38 oz.
Gap Height 0.312", 7.92mm
Voice Coil Diameter 2", 50.8mm

THIELE & SMALL PARAMETERS  
Resonant Frequency (fs) 43Hz
DC Resistance (Re) 5.57
Coil Inductance (Le) 1.01mH
Mechanical Q (Qms) 6.69
Electromagnetic Q (Qes) 0.51
Total Q (Qts) 0.48
Compliance Equivalent Volume (Vas) 161 liters / 5.7 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 186cc
Mechanical Compliance of Suspension (Cms) 0.40mm/N
BL Product (BL) 10.0 T-M
Diaphram Mass inc. Airload (Mms) 34 grams
Efficiency Bandwidth Product (EBP) 84
Maximum Linear Excursion (Xmax) 3.5mm
Surface Area of Cone (Sd) 532.4 cm2  
Maximum Mechanical Limit (Xlim) 10.4mm  
     
MOUNTING INFORMATION    
Recommended Enclosure    
Sealed 42.5-28 liters/1-1.5 cu.ft.  
Vented 37-71 liters/1.3-2.5 cu.ft.  
Overall Diameter 12.03", 305.5mm  
Baffle Hole Diameter 10.95", 278.1mm  
Front Sealing Gasket fitted as standard  
Rear Sealing Gasket fitted as standard  
Mounting Holes Diameter 0.25", 6.4mm  
Mounting Holes B.C. D. 11.59", 294.3mm  
Depth 4.47", 114mm  
Net Weight 7.8 lbs., 3.5 kg  
Shipping Weight 10 lbs., 4.5 kg  
     
MATERIALS OF CONSTRUCTION    
Coil Construction Copper voice coil  
Coil Former Polyimide former  
Magnet Composition Ferrite magnet  
Core Details Extended core  
Basket Materials Pressed steel basket  
Cone Composition Paper Cone  
Cone Edge Composition Cloth cone edge  
Dustcap Composition Screened cloth dust cap  
 




 
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