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Eminence Beta-12A-II 12" Driver

Brand:|Model: Beta-12A-II|Part # 290-408
The performance of the Eminence Beta-12A-II 12" speaker is optimized for sound reinforcement systems. The Beta-12A-II is also suitable for lead and bass guitar, keyboards, guitar combos club music systems and stage monitors.
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List Price$79.99
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Part # 290-408
  • Kapton coil former
  • Polyamide-imide coated copper voice coil
  • Ferrite magnet
  • Vented and pole piece
  • Pressed steel basket
  • Paper cone
  • Cloth accordian surround

Product Details

Eminence Beta-12A-II 12" Driver

The performance of the Eminence Beta-12A-II 12" speaker is optimized for sound reinforcement systems. The Beta-12A-II is also suitable for lead and bass guitar, keyboards, guitar combos club music systems and stage monitors. Made in the USA. 7-year manufacturer's warranty!

Product Specifications
  • Nominal Diameter12"
  • Power Handling (RMS)250 Watts
  • Power Handling (max)500 Watts
  • Impedance8 ohms
  • Frequency Response43 to 3,800 Hz
  • Sensitivity98 dB 1W/1m
  • Voice Coil Diameter2"
  • Magnet Weight38 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)47 Hz
  • DC Resistance (Re)5 ohms
  • Voice Coil Inductance (Le)0.64 mH
  • Mechanical Q (Qms)6
  • Electromagnetic Q (Qes)0.50
  • Total Q (Qts)0.46
  • Compliance Equivalent Volume (Vas)4.24 ft.³
  • Mechanical Compliance of Suspension (Cms)0.29 mm/N
  • BL Product (BL)10.80 Tm
  • Diaphragm Mass Inc. Airload (Mms)40g
  • Maximum Linear Excursion (Xmax)4.4 mm
  • Surface Area of Cone (Sd)538.9 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"
  • Depth4.57"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume2.36 ft.³
  • Sealed F383 Hz
  • Vented Volume7.35 ft.³
  • Vented F342 Hz
Eminence Beta-12A-II 12" Driver
  • BrandEminence Speaker
  • ModelBeta-12A-II
  • Part Number290-408
  • UPC876358000111
  • Product CategoryPro Woofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Product Rating
    (11 Reviews)
  • Weight11 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.

View similar products to the Eminence Beta-12A-II 12" Driver
in the Pro Woofers, Subwoofers & Midrange Speakers product category.


Eminence Beta-12A-II 12" Driver
Eminence Beta-12A-II 12" Driver is rated 4.5455 out of 5 by 11.
Rated 5 out of 5 by from Very HappyQuality and construction appear very good and I really appreciate the gasket on the back side of the basket for mounting on the front of the baffle. The packing from Eminence was excellent. I installed these speakers in mid sized sealed cabinets along with the 270-125 heavy duty titanium super tweeters. Over all I m very pleased. I am powering them with a 150W per channel mixer. These will play extremely loud with no hint of distortion. No rubs, buzzes, or other issues. The sound is fairly natural. Very punchy in the mid range. Vocals and guitar seem to come to the front of the mix. The bass is more subdued. Of course, this is probably due to overlap with the tweeters. At low and medium volume they still sound good. Almost as good as decent Hi-Fi speakers and better than most PA speakers on recorded music. I think they ll work really well for my indented purpose as PA vocal speakers.
Date published: 2008-07-01
Rated 5 out of 5 by from Save time AND Money!I am so glad we found this site for our speaker. We had one of our speakers blow before, and we had it repaired at the store we bought it from. What a mistake! We bought this speaker & replaced it ourselves (only a few screws to loosen & replace) and it was done in 5 minutes. The other place told us we could pick it up in a week & we had to use a crappy loaner. We saved time and literally 1/2 the money (No labor costs)! Thank you.
Date published: 2008-05-31
Rated 5 out of 5 by from good productgood
Date published: 2008-04-11
Rated 3 out of 5 by from Very well sounding driversThese are very well sounding drivers. Nice mid-bass and strong mid range. Good sensitivity and good power handling. The only thing that should be improved is the speaker terminals. The spring loaded post type should be installed in the future models. Besides that, this is a very good driver and good value for the money.
Date published: 2007-11-05
Rated 4 out of 5 by from PA replacement speakersSpeakers sound excellent. Make the PA really come alive.
Date published: 2007-10-09
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Eminence Beta-12A-II 12" Driver

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