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Eminence BETA8CX

Price: $74.99
  BETA 8CX  
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Recommended for professional audio mid-range reproduction in sealed enclosures. Also suitable for mid-bass or floor monitor applications in vented 2-way cabinets.
Nominal Basket Diameter: 8", 203.2mm
Nominal Impedance*: 8 ohms
Power Rating**
Watts: 250W
Music Program: 500W
Resonance: 63Hz
Usable Frequency Range: 74Hz - 20kHz
Sensitivity***: 93.3dB
Magnet Weight: 38 oz.
Gap Height: 0.31", 7.94mm
Voice Coil Diameter: 2", 50.8mm

Thiele & Small Parameters
Resonant Frequency (fs): 63Hz
DC Resistance (Re): 5.6
Coil Inductance (Le): 0.85mH
Mechanical Q (Qms): 8.82
Electromagnetic Q (Qes): 0.34
Total Q (Qts): 0.33
Compliance Equivalent Volume (Vas): 19.99 liters / 0.71 cu.ft.
Peak Diaphragm Displacement Volume (Vd): 67.2cc
Mechanical Compliance of Suspension (Cms): 0.32mm/N
BL Product (BL): 11.1 T-M
Diaphragm Mass Inc. Airload (MMs): 18.3 grams
Efficiency Bandwidth Product (EBP): 193.1
Maximum Linear Excursion (Xmax): 3.2mm
Surface Area of Cone (Sd): 210 cm2
Maximum Mechanical Limit (Xlim): 6.9mm

Mounting Information
Recommended Enclosure Volume
Sealed: 3-10 liters / 0.1-0.4 cu.ft.
Vented: 8-21 liters / 0.3-0.8 cu.ft.
Driver Volume Displaced: 48.4 / 0.79 liters
Overall Diameter: 8.24", 209.3mm
Baffle Hole Diameter: 7.13", 181.1mm
Front Sealing Gasket: Fitted as standard
Rear Sealing Gasket: Fitted as standard
Mounting Holes Diameter: 0.22", 5.6mm
Mounting Holes B.C.D.: 7.75", 196.9mm
Depth: 3.5", 88.9mm
Net Weight: 6.8 lbs, 3.1 kg
Shipping Weight: 7.5 lbs, 3.4 kgs

Materials of Construction
Coil Construction: Copper voice coil
Coil Former: Kapton former
Magnet Composition: Ferrite magnet
Core Details: Tapered Coax
Basket Materials: Pressed steel basket
Cone Composition: Treated Paper Cone
Cone Edge Composition: Sealed Cloth cone edge
Dust Cap Composition: Zurette dust cap


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