Eminence Beta-8A 8" Midrange/PA Driver

Brand:| Model: Beta-8A
Eminence's durable and efficient Beta-8A 8" speaker features extremely smooth frequency response and high power handling. Its performance rivals that of speakers costing much more!
  • Kapton coil former
  • Polyamide-imide coated copper voice coil
  • Ferrite magnet
  • Pressed steel basket
  • Paper cone
  • Cloth accordian surround
  • Solid composition paper dust cap
Part # 
Weight: 7 lbs.  
List Price$69.99
You Save14%
Your Price
Part # 290-404
Qty:  EA
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Product Details

Eminence Beta-8A 8" Midrange/PA Driver

The Eminence Beta-8A 8" Midrange/PA Driver's performance is optimized for midrange use between 400 Hz and 4 kHz in multiway systems. The Beta-8A is also suitable for vocal PA, keyboards, stage monitors, and bass guitar.

Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)225 Watts
  • Power Handling (max)450 Watts
  • Impedance8 ohms
  • Frequency Response78 to 4,500 Hz
  • Sensitivity95.1 dB 1W/1m
  • Voice Coil Diameter2"
  • Magnet Weight34 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)65 Hz
  • DC Resistance (Re)5.99 ohms
  • Voice Coil Inductance (Le)0.49 mH
  • Mechanical Q (Qms)4.95
  • Electromagnetic Q (Qes)0.42
  • Total Q (Qts)0.38
  • Compliance Equivalent Volume (Vas)0.82 ft.³
  • Mechanical Compliance of Suspension (Cms)0.37 mm/N
  • BL Product (BL)9.6 Tm
  • Diaphragm Mass Inc. Airload (Mms)16g
  • Maximum Linear Excursion (Xmax)3 mm
  • Surface Area of Cone (Sd)210 cm²
Materials of Construction
  • Cone MaterialPaper
  • Surround MaterialCloth
  • Voice Coil Wire MaterialAluminum
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialSteel
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter8.24"
  • Baffle Cutout Diameter7.13"
  • Depth3.5"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.22 ft.³
  • Sealed F3146 Hz
  • Vented Volume0.55 ft.³
  • Vented F387 Hz
Eminence Beta-8A 8" Midrange/PA Driver
  • BrandEminence Speaker
  • ModelBeta-8A
  • Part Number290-404
  • UPC876358000067
  • Product CategoryWoofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Product Rating
    (15 Reviews)
  • Weight7 lbs.
  • California Prop 65

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

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in the Woofers, Subwoofers & Midrange Speakers product category.


Eminence Beta-8A 8" Midrange/PA Driver
Eminence Beta-8A 8" Midrange/PA Driver is rated 4.1333 out of 5 by 15.
Rated 5 out of 5 by from Great power handling!I build all of my own PA speakers and this 8 has the most midrange detail and power handling of anything I have tried.
Date published: 2014-06-27
Rated 4 out of 5 by from Eminence = Quality & ValueI have been designing, building, installing & running Pro Sound cabinets for 13 yrs using only Eminence products. I have had 1 failure in 13 yrs! Under-powering a speaker is what blows them. If you wire & power an Eminence woofer as they recommend, they will run like the ever-ready bunny!
Date published: 2010-04-19
Rated 4 out of 5 by from loud and clearGreat for loud vocals put in my truck with some eminence horns and you need them under the seat to calm the sound down running 100 watts alphasonik class a amp. very happy
Date published: 2010-02-11
Rated 4 out of 5 by from Eminence Rules!If Eminence had a high failure rate I doubt seriously that world reknown Klipsch speakers would have been using them for decades!Love my Klipsch!
Date published: 2009-12-17
Rated 1 out of 5 by from Unless you are replacing a failed Eminence drive uI have had a 100% failure rate for Eminence cones in my 9 years of installing speakers. Two 400 Watt 4 ohms cones failed at the first use, and two Beta-8A in other speakers which both failed one after 1.5 years, the second after 3.5 years. None of the speakers were being over driven or fed distorted signals. They are just not reliable.I replaced the 400 Watt cones with Colossus cones. Cost twice as much, but still working after 6 years.
Date published: 2009-05-11
Rated 5 out of 5 by from Bang for the buckI used this baby to upgrade the 8" woofer in an EVSX80 cabinet and it worked out great. Clear, powerful, perfect for a compact vocal floor monitor or up on a stand as a side fill. Best price was here at Parts Express. They always have what I need at a great price.
Date published: 2009-03-08

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
Eminence Beta-8A 8" Midrange/PA Driver

does anyone know of an eminence 8 in midrange with an impedance of 16 ohms

Asked by: peteyboy
The only 8" 16 ohm speaker available from Eminence is the Delta Pro below.http://www.parts-express.com/eminence-delta-pro-8b-8-midrange-16-ohm--290-508
Answered by: MattP
Date published: 2014-08-11

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