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Eminence Alpha-8A 8" PA Driver

Brand:|Model: Alpha-8A|Part # 290-401
Eminence's Alpha-8A 8" professional speaker features high efficiency, excellent power handling, and extended frequency response.
A restocked/refurbished, or Open Box unit of this product is available -- see it now
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List Price$54.99
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Part # 290-401
  • Cloth accordian surround
  • Polyimide voice coil former
  • Ferrite magnet
  • Pressed steel basket
  • Paper cone
  • Cloth accordian surround

Product Details

Eminence Alpha-8A 8" PA Driver

The stamped-steel frame Eminence Alpha-8A 8" PA Driver is an ideal woofer for small P.A. and club speaker systems, as well as keyboard or guitar amplifier combos. Made in the USA. 7-year manufacturer's warranty!

Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)125 Watts
  • Power Handling (max)250 Watts
  • Impedance8 ohms
  • Frequency Response58 to 5,000 Hz
  • Sensitivity94 dB 1W/1m
  • Voice Coil Diameter1.5"
  • Magnet Weight20 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)73 Hz
  • DC Resistance (Re)5.30 ohms
  • Voice Coil Inductance (Le)0.44 mH
  • Mechanical Q (Qms)4.60
  • Electromagnetic Q (Qes)0.68
  • Total Q (Qts)0.59
  • Compliance Equivalent Volume (Vas)0.63 ft.³
  • Mechanical Compliance of Suspension (Cms)0.28 mm/N
  • BL Product (BL)7.80 Tm
  • Diaphragm Mass Inc. Airload (Mms)17g
  • Maximum Linear Excursion (Xmax)3.20 mm
  • Surface Area of Cone (Sd)210 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 Diameter8.24"
  • Baffle Cutout Diameter7.13"
  • Depth3.25"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.51 ft.³
  • Sealed F3106 Hz
  • Vented Volume1.28 ft.³
  • Vented F352 Hz
Eminence Alpha-8A 8" PA Driver
  • BrandEminence Speaker
  • ModelAlpha-8A
  • Part Number290-401
  • UPC876358000012
  • Product CategoryPro Woofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Product Rating
    (16 Reviews)
  • Weight5.3 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 Alpha-8A 8" PA Driver
in the Pro Woofers, Subwoofers & Midrange Speakers product category.


Eminence Alpha-8A 8" PA Driver
Eminence Alpha-8A 8" PA Driver is rated 4.8125 out of 5 by 16.
Rated 5 out of 5 by from Eminence SpeakerThe speaker sounds great! this was a great purchase!
Date published: 2014-09-13
Rated 5 out of 5 by from SatisfiedI just bought two of these for a 9x8 guitar cab that I have and they are great. They sound like they said they would. They are very warm and to me sound as good as tens. I tend to play bass heavy music and these handle it well.
Date published: 2014-06-04
Rated 5 out of 5 by from Perfect for Yamaha Passport 300I needed replacement drivers for the Yamaha Passport 300 speakers, and after trying some alternatives these were PERFECT with superb depth and range! These may have been the originals OEM'd in the first place. Definitely recommend. Note that you will have to change the female terminal on the negative lead wire of the cabinet to the next size up. The original driver had a smaller terminal on that side.
Date published: 2014-04-04
Rated 5 out of 5 by from Perfect fit for portable boomboxAfter simulating many different 10" and 8" drivers on this site I settled on this one, and in my finished box it sounds great. It's in a 40L ported enclosure tuned to around 45 Hz (with an f3 about the same). It mated well with the dayton DC28F tweeter I used, and it is crossed at 1300 Hz but since this woofer is so clear I think I could have crossed it higher. If used in a ported box down to 45-50Hz, it runs out of excursion with less than 20 watts, but that fits what I used it for (even a small 12v amp will drive this speaker to loud levels with a sensitivity of 94dB).
Date published: 2013-10-05
Rated 5 out of 5 by from Perfect drop in replacement/upgrade for JBL MR28 Bookshelf SpeakersI had these laying around for a while until I picked up a pair of JBL MR28 bookshelf speakers with rotten surrounds for next to nothing at goodwill. Dropped these in just for fun and wowww! Tight crystal clear sound, I couldn’t believe they sounded that sharp so ran a sweep from 20 Hz to 20 KHzto see how they looked on paper and it’s like a match made in heaven, virtually flat from 250Hz up to 14 KHz. See the frequency vs THD graph in the attached picture.
Date published: 2012-05-09
Rated 5 out of 5 by from Excellent for Center Channel BuildI'm using one of these with a HiVi Sd1.1a to make a HT center channel. Woofer matches well with the tweeter, both have high sensitivity. The output level is unreal for an 8" driver, strong, clean sound w/o the cone hardly moving at all. Needs vented box to get the bass out of the speaker, but hits incredibly hard for an 8" driver. Keeps up with my 12" Hifi Woofers on all but the lowest octave. I originally tried a RS180-4 (about the same price) and the Eminence works much better in my project. Either the RS180-4 91db is exaggerated or the Eminence 94db is conservative, but the Eminence simply runs circles around the RS180-4 in sound output at the same volume setting. Maybe pro and home audio drivers are rated differently?The speaker seems a bit pricey for an 8" with a 20oz magnet, paper cone, and stamped steel frame. I suppose it's how it SOUNDS that matters, not how it's made. Also note the mechanical power capacity is only 50W when used as a midbass according to the Eminence website. Again, Pro and Home drivers may be rated differently.
Date published: 2011-04-02
  • 2016-02-14T06:52CST
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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  for a prompt reply.
Eminence Alpha-8A 8" PA Driver

I have an old Peavey Triflex pa speaker 8' that needs to be replaced -what would be the best replacement option.

Asked by: Adam Bomb
We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
Date published: 2016-01-13

Looking to replace the 8" woofers in some Bose 601's I have. It looks like the depth and diameter will work but it looks like it is 1/8" too large on the inside. Could someone confirm this and if so, is there a replacement woofer you would suggest?

Asked by: JamesHC
The best choice for this replacement would actually be our Dayton Classic 8" woofer below. This woofer requires a cutout diameter of 7.2" however. Modifications may be required for the proper fit.
Answered by: MattP
Date published: 2014-12-01

Do you need to filter out the low end?

Do you need to filter out the low end below 50 Hz for this speaker to keep it from distorting?And what would be the high frequency crossover point?
Asked by: gcou
Yes a HPF is recommended in order to get the most output from these drivers, something closer to 80 Hz will be better depending on application. These will play as high as 3.5kHz smoothly.
Answered by: MattP
Date published: 2013-02-05

What crossover to use

On the Eminence tech sheet they recommend a high pass filter at 55Hz for this driver has any one ever used this setup?I was going to use a 1st order high pass at 55Hz and a second order low pass at 3Khz for this driver.
Asked by: Bonhomme
Unless you have a lot of "basshead" music going to it, just run full range. 3khz is too high for an 8" for a hifi application, I'm running mine at 2khz. You're limited to 50W mechanically on this woofer when used as a midbass.
Answered by: Servicetech
Date published: 2012-03-03
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