Eminence Beta-12CX 12" Coaxial Driver

Brand:| 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.
  • Kapton coil former
  • Polyamide-imide coated copper voice coil
  • Ferrite magnet
  • Extended pole piece
  • Pressed steel basket
  • Paper cone
  • Cloth accordian surround
Part # 
Weight: 10.03 lbs.  
Awaiting Updated Due Date
Your Price
Part # 290-504
Qty:  EA
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Product Details

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 Specifications
  • Nominal Diameter12"
  • Power Handling (RMS)250 Watts
  • Power Handling (max)500 Watts
  • Impedance8 ohms
  • Frequency Response66 to 3,000 Hz
  • Sensitivity96.4 dB 1W/1m
  • Voice Coil Diameter2"
  • Magnet Weight38 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)47 Hz
  • DC Resistance (Re)5.57 ohms
  • Voice Coil Inductance (Le)1.01 mH
  • Mechanical Q (Qms)6.69
  • Electromagnetic Q (Qes)0.51
  • Total Q (Qts)0.48
  • Compliance Equivalent Volume (Vas)5.7 ft.³
  • Mechanical Compliance of Suspension (Cms)0.4 mm/N
  • BL Product (BL)10 Tm
  • Diaphragm Mass Inc. Airload (Mms)34g
  • Maximum Linear Excursion (Xmax)3.5 mm
  • Surface Area of Cone (Sd)532.4 cm²
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"
  • Depth4.47"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume2.4 ft.³
  • Sealed F377 Hz
  • Vented Volume8.05 ft.³
  • Vented F340 Hz
Eminence Beta-12CX 12" Coaxial Driver
  • BrandEminence Speaker
  • ModelBeta-12CX
  • Part Number290-504
  • UPC876358000135
  • Product CategoryCoaxial Full-Range Speakers
  • Unit of MeasureEA
  • Product Rating
    (3 Reviews)
  • Weight10.03 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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View similar products to the Eminence Beta-12CX 12" Coaxial Driver
in the Coaxial Full-Range Speakers product category.


Eminence Beta-12CX 12" Coaxial Driver
Eminence Beta-12CX 12" Coaxial Driver is rated 4.6667 out of 5 by 3.
Rated 5 out of 5 by from Great Choice for compact Monitors!I purchased two of these to use in very small compact stage monitors. I used them with the Eminence ASD1001 compression driver. This combo is great for the small size monitors that I'm looking for. Great for monitoring Vocals, Guitar and some keys. Definitely make a decent L-Pad for the compression driver as it is noticeably louder than the main driver. I knocked down about -6dB off the compression driver to keep everything smooth. I'm going to continue using these in compact stage monitor cabinets! The performance for size and weight is excellent and with higher fuel prices, the more I can put in a vehicle, the better!
Date published: 2011-06-08
Rated 5 out of 5 by from The BEST!Only way to go for many applications
Date published: 2009-09-04
Rated 4 out of 5 by from Makes an excellent vocal monitor in a small boxI used the P.E. suggested box design of about 1 cu/ft.- sealed,with an Eminence PDS-2002 driver.With filters in place as described, it works very well for vocals or brass. I don't think that it would do as well with loud piano or drums.
Date published: 2007-10-14
  • 2015-05-04T06:43CST
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Product Q&A

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Eminence Beta-12CX 12" Coaxial Driver

What is the diameter of the threaded hole for mounting a HF component? It looks like 1" but I can't seem to find it listed in the Manuf. Specs

Asked by: Soundguy124
This driver has a standard 1-3/8" 18 TPI mount for the horn driver.
Answered by: MattP
Date published: 2014-03-19

How many watts(rms) is this spkr rated as? What's the resistance?

Asked by: Makkasound
This driver is rated for 250 watts RMS at 8 ohms. The specs can be found here:http://www.parts-express.com/pdf/290-504s.pdf
Answered by: MattP
Date published: 2013-05-01
  • 2015-05-04T09:01CST
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