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Eminence Beta-12CX 12" Coaxial Driver

Eminence SpeakerPart # 290-504
Model: Beta-12CX
The Eminence Beta-12CX coaxial 12" speaker offers the coherency of a point source, while providing a form factor that requires minimal baffle space.

Key Features

  • 1-3/8"-18 TPI mount is compatable with many popular horn drivers
  • Polyamide-imide coated copper voice coil with Kapton former
  • Perfect for creating ultra compact monitors
  • Point source design delivers equal off axis response in all directions
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Overview

Eminence Beta-12CX 12" Coaxial Driver

The Eminence Beta-12CX 12" Coaxial Driver is recommended for professional audio midrange reproduction in sealed loudspeaker enclosures. Also suitable for midbass or floor monitor applications in vented 2-way speaker cabinets. The Beta-12CX's coaxial design facilitates use of an HF driver to extend frequency response. Standard 1-3/8"-18 TPI threaded insert for HF horn driver (sold separately). Made in the USA. 7-year manufacturer's warranty!

Featured in Eminence's "Using coaxial products for DIY monitors and home hi-fi applications" article.

Product Details

BrandEminence Speaker
ModelBeta-12CX
Part Number290-504
UPC876358000135
Unit of MeasureEach
Weight10.03

Product Specifications

Nominal Diameter12"
Power Handling (RMS)250 Watts
Power Handling (MAX)500 Watts
Impedance8Ω
Frequency Response57 to 4,600Hz
Sensitivity97.3dB 2.83V/1m
Voice Coil Diameter2"

Thiele-Small Parameters

Resonant Frequency (Fs)47Hz
DC Resistance (Re)5.42Ω
Voice Coil Inductance (Le)0.64mH
Mechanical Q (Qms)5.64
Electromagnetic Q (Qes)0.52
Total Q (Qts)0.48
Compliance Equivalent Volume (Vas)4.27ft³
Mechanical Compliance of Suspension (Cms)0.3mm/N
BL Product (BL)10.79T·m
Diaphragm Mass Inc. Airload (Mms)38g
Maximum Linear Excursion (Xmax)3.5mm
Surface Area of Cone (Sd)538.9cm²

Materials of Construction

Cone MaterialPaper
Surround MaterialCloth
Voice Coil Wire MaterialCopper
Voice Coil FormerKapton® / Polyimide
Basket / Frame MaterialSteel
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter12.03"
Baffle Cutout Diameter10.95"
Depth4.85"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume1.4ft³
Sealed F390Hz
Vented Volume3.6ft³
Vented F349Hz

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