  
Application Notes
The Beta 12CX is a coaxial speaker to which a Compression driver must be attached. Eminence recommends the PSD2002S-8 Compression driver and the PXB2:1K6 2-way Crossover with this product (not included). Ideal for full-range, Near Field and monitoring applications.
Materials of Construction:
Kapton coil former for increased rigidity and thermal protection
Polyamide-imide coated two-layer, 30ga., copper Voice Coil for improved power handling and durability.
Ferrite Magnet
Extended core for increased power handling
Premium pressed steel basket for maximum strength
Paper cone
Cloth cone edge
Screened cloth dust cap
Aluminum Horn
Specifications:
Nominal Basket Diameter: 12", 304.8mm
Impedance: 8 Ohms
Power Rating: 250Wrms
Resonance: 43Hz
Usable Frequency Range: 45Hz - 20kHz
Magnet Weight: 38oz.
Gap Height: 0.312", 7.94mm
Voice Coil Diameter: 2", 50.8mm
Mounting Information:
Recommended Enclosure Volume (vented):48 - 79 liters1.7 - 2.8 cu. ft.
Overall Diameter: 12.02", 305.2mm
Baffle Hole Diameter: 10.97", 278.6mm
Front Sealing Gasket: fitted as standard
Rear Sealing Gasket: fitted as standard
Mounting Holes Diameter: 0.25", 6.4mm
Mounting Holes B.C.D.: 11.63", 295.3mm
Depth: 4.47", 113.5mm
Shipping Weight: 9.5lbs., 4.3 kg.
Thiele-Small Parameters:
Resonant Frequency (fs): 43Hz
Impedance (Re): 5.57 Ohms
Coil Inductance (Le): 1.01mH
Electromagnetic Q (Qes): 0.51
Mechanical Q (Qms): 6.69
Total Q (Qts): 0.48
Compliance Equivalent Volume (Vas):161 liters5.66 cu. ft.
Peak Diaphragm Displacement Volume (Vd): 161cc
Mechanical Compliance of Suspension (Cms): 0.40mm/N
BL Product (BL): 10.0 T-M
Diaphragm Mass inc. Airload (Mms): 34 grams
Equiv. Resistance of Mechanical Suspension Loss (RMS): 1.38N*sec/M
Efficiency Bandwidth Product (EBP): 83
Voice Coil Overhang (Xmax): 0.8mm
Surface Area of Cone (SD): 532.4cm2
Impedance at Resonance (Zmax): 78 Ohms
Maximum Mechanical Limit (Xmech): 20.83mm
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