Eminence Beta-12CX - 8 ohm 12" 250W Pro Audio Woofer (Coaxial Ready)

SKU: 550-006

Canadian Dollar Price:
Sale price$173.99
In stock (5 units)


Recommended for professional audio as a mid-bass in either vented, or sealed satellite or floor monitor enclosures. Also works nicely in vented two-way enclosures used for small coverage areas.

Manufacturer Spec Sheet

Example Cabinet Designs

Speaker Detail
Nominal Basket Diameter 12", 305 mm
Nominal Impedance* 8 Ω
Power Rating*
Program Power 500 W
Watts 250 W
Resonance 47 Hz
Usable Frequency Range 57 Hz - 4.6 kHz
Sensitivity* 97.3 dB
Magnet Weight 38 oz.
Gap Height 0.31", 7.9 mm
Voice Coil Diameter 2", 51 mm
Thiele & Small Parameters
Resonant Frequency (fs) 47 Hz
DC Resistance (Re) 5.42 Ω
Coil Inductance (Le) 0.64m H
Mechanical Q (Qms) 5.64
Electromagnetic Q (Qes) 0.52
Total Q (Qts) 0.48
Compliance Equivalent Volume (Vas) 120.94 liters / 4.27 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 188.6 cc
Mechanical Compliance of Suspension (Cms) 0.3 mm/N
BL Product (BL) 10.79 T-M
Diaphragm Mass Inc. Airload (MMs) 38 grams
Efficiency Bandwidth Product (EBP) 90
Maximum Linear Excursion (Xmax) 3.5 mm
Surface Area of Cone (Sd) 538.9 cm2
Maximum Mechanical Limit (Xlim) 10.4 mm
Mounting Information
Recommended Enclosure Volume
Sealed 26.9-70.79 liters / 0.95-2.5 cu.ft.
Vented 32.85-158.58 liters / 1.16-5.6 cu.ft.
Driver Volume Displaced 0.071 cu.ft. / 2 liters
Overall Diameter 12.03", 305.6 mm
Baffle Hole Diameter 11.07", 281.2 mm
Front Sealing Gasket Yes
Rear Sealing Gasket Yes
Mounting Holes Diameter 0.25", 6.4mm
Mounting Holes B.C.D. 11.59", 294.4mm
Depth 4.47", 113.5 mm
Net Weight 7.8 lbs, 3.54 kg
Shipping Weight 10 lbs, 4.54 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 Paper cone
Cone Edge Composition Cloth cone edge
Dust Cap Composition Screened cloth dust cap

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