Eminence Alpha-15A 15" Driver

Brand:| Model: Alpha-15A
The Eminence Alpha-15A 15" speaker is ideal for two-way sound reinforcement systems, keyboard, and guitar combos. For all bass applications.
  • Kapton coil former
  • Polyamide-imide coated copper voice coil
  • Ferrite magnet
  • Vented and extended pole piece
  • Pressed steel basket
  • Paper cone
  • Cloth accordian surround
Part # 
Weight: 8.65 lbs.  
Your Price
Part # 290-407
Qty:  EA
Available Payment Methods

Product Details

Eminence Alpha-15A 15" Driver

The Eminence Alpha-15A 15" speaker is ideal for two-way sound reinforcement systems, keyboard, and guitar combos. For all bass applications. Made in the USA. 7-year manufacturer's warranty!

Product Specifications
  • Nominal Diameter15"
  • Power Handling (RMS)200 Watts
  • Power Handling (max)400 Watts
  • Impedance8 ohms
  • Frequency Response46 to 3,500 Hz
  • Sensitivity97 dB 1W/1m
  • Voice Coil Diameter1.5"
  • Magnet Weight25 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)41 Hz
  • DC Resistance (Re)5.88 ohms
  • Voice Coil Inductance (Le)0.84 mH
  • Mechanical Q (Qms)7.23
  • Electromagnetic Q (Qes)1.53
  • Total Q (Qts)1.26
  • Compliance Equivalent Volume (Vas)9.2 ft.³
  • Mechanical Compliance of Suspension (Cms)0.25 mm/N
  • BL Product (BL)7.7 Tm
  • Diaphragm Mass Inc. Airload (Mms)59g
  • Maximum Linear Excursion (Xmax)3.8 mm
  • Surface Area of Cone (Sd)856.3 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 Diameter15.15"
  • Baffle Cutout Diameter13.77"
  • Depth5.83"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume6.42 ft.³
  • Sealed F345 Hz
  • Vented Volume85.78 ft.³
  • Vented F323 Hz
Eminence Alpha-15A 15" Driver
  • BrandEminence Speaker
  • ModelAlpha-15A
  • Part Number290-407
  • UPC876358000050
  • Product CategoryWoofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Product Rating
    (14 Reviews)
  • Weight8.65 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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Eminence Alpha-15A 15" Driver
Eminence Alpha-15A 15" Driver is rated 4.5714 out of 5 by 14.
Rated 5 out of 5 by from Great driver!Added 15" Alphas to my open open baffles, immediately can hear sound improvement.Good low end extension even without subs. Great driver!
Date published: 2015-01-05
Rated 5 out of 5 by from An inexpensive driver with a satisfying sound.I purchased two of the Alpha 15A about a year ago. I bought them because of their price. After listening to them for 10 months, I must say that they are underrated. I use them for my backyard/garage speakers. The more I listen; the more I like them. I often crank them and find very low distortion. Their frequency response sounds almost like full range speakers. The voices sound natural. Solo pianos are very natural. I use a very cheap horn driver with them which just doesn't measure up. These speakers are good enough to add an Eminence crossover and the Eminence ASD1001 horn drivers. I expect to finish this complete Eminence system and have an impressive back yard system for those summer concerts. They also do very well with my Lepai 2020 amp.
Date published: 2014-04-25
Rated 5 out of 5 by from Excellent Open Baffle Speaker.I placed a pair of these into a pair of Martin King's Open Baffle speaker designs. I was absolutely floored with the performance. They are a great asset to the open baffle speaker builders of the world. I also run a Dayton 12" sub with them. The sound is Visceral.The only thing that would have made this project better was if Parts Express carried the Fostex drivers. Every other part on them Came from Parts Express.
Date published: 2013-06-02
Rated 5 out of 5 by from Am using it full range for nowThe Alpha 15 is a good value for a number of reasons, TheAlpha 15 has high efficiencyalso it's high QT. I tried using this driver along withmy 2 audio nirvana drivers and the result was a disasterbecause I didn't understand what I was doing, I have since read the KING worksheet on open baffels and now see the error of my ways. but I was surprised that this 15 inch woofer sounded so much more extended thanthe 3500 top end rating , I can hear cymbals. I will probably do it up right later by adding the smaller full ranger with the high and low pass crossover componentsbut for now it sounds pretty unbelievably good as a standalone full range driver. I will call it the one. My baffel is25x49x9, I used home depots pre cut 2x4 mfdyou will need 4 pieces, size them when you buy them. Itwas still nescessary to equalize the bass on these. There'sways to get more output from the alpha , one is choosinga smaller full range driver of less efficiency so when you turn up the volume to hear the less efficient full ranger you are juicing the woofer, nice plan except you give up efficiency. the otherway is to get a Y connecter and run another amp with it'sown volume control. and of course you can try some sort of bass boost like tone controls on a preamp or whatever.This set up with the singe Alpha delivers a large soundstage with fat full bass, thats what I like about the openbaffel sound. Remember acoustics and speaker placementare stlill very important. i have found the biggest problemin small rooms is standing waves. The alpha is back mounted and centered on the baffel.
Date published: 2012-05-09
Rated 5 out of 5 by from Open your BafflesIf you haven't had the pleasure of hearing an open baffle , you are missing out...Just follow Martin j King's basic plan and you will be amazed. Everyone who hears mine says the same thing, "Sounds like the band is right there". What else is there.....I talked to Eminence if they had any other speaker that works for open baffle and they said, No. The speaker is well made sounds great and not expensive. Need I say more?
Date published: 2012-03-16
Rated 5 out of 5 by from Great Replacement Speaker!Used this woofer for a replacement in one of my 1983 SP3's. Works fine, sounds great and you can't beat the price! We run a 5 piece country band trough these mains in small to medium venues and they are superb! When it's time, I'll replace the other one with this same speaker...
Date published: 2012-01-21
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Product Q&A

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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 Alpha-15A 15" Driver

Hello.  I'm trying to upgrade the speaker of my SWR LA15 Bass amp combo, which I was told is an Eminence Alpha 15.  Can you please tell me an upgrade replacement speaker as I dont want to get the same stock as my SWR...hoping to make it sound better.

Asked by: Jessie
Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-05-01

I noticed fs is 41hz, but overall range is 46-3500Hz. Should I have a problem if I low passed these at 80Hz, say in a 3-way system, or do these roll off sharply enough where fs is a non-issue?

Asked by: whatthe
This requires a bit more information in order to proceed. Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-01-06

Hola, which 15"  for LF will be your best recomendation TO replace at a electro voice DL15 BFH  (Electro Voice SX250)

Asked by: teeven
Eminence Kappa-15A would be a good choice. If you need a cast aluminum frame like the original driver, you will need to step up to the Kappa Pro-15A. That's my recommendation.
Answered by: DaytonAudio_Rory
Date published: 2014-12-03

Would you recommend this speaker for a Bass Guitar cab where the Bass head is a Traynor 45watt tube. YBA-1 8 ohm ?

Asked by: Blade
This requires a bit more information in order to proceed. Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2014-10-09

2 12 inch nirvana full rangers on a 24x48 in baffel, one nirvana in the center, the other above that with the alpha on the bottom, 3 drivers per side,

the audio nirvana drivers are 95.8 db efficient and the response is something like 38 hrtz to 20 k hrtz. the alpha would be a goodmatch with it's efficiency at 97 db, should be able to get away without an extra amp, as it is now I just have one audio nirvanaper baffle in the center. I would have to rout an additional 4 holes. it sounds pretty good with just the one nirvana but is of course bass shy, iv'e compensated by turning the bass tone control all the way, I guess one nirvana could be enough but Iv'e had them in a ported box and then an open box and the 2sounded smoother than the one plus 3 db more efficient , theefficiency in an open baffel with one driver is allready awsome.but anyway I think the alpha with it's high efficiency and highQt makes it a perfect driver for open baffel. I believe the 2 nirvanas instead of one would increase the bass but would bebetter with the alpha to give it foundation.
Asked by: spunky
I am sorry but I don't understand the question. It sounds like you are building a stacked box 3 or 4 way PA system. Your speaker selections are good so if the cabinets are right and you have good crossovers, EQ and power the arrangement presented should yield good lows and punchy low-mids.Stack some horn lenses, good drivers and tweeters to this and you could handle mid sized outdoor venues.
Answered by: Nitnub
Date published: 2012-04-30

designing an open baffel with 2 12 inch full rangers, would a low pass xover at 80 htrz on the alpha be a good point to crossover

Asked by: spunky
Please, explain your open baffle layout more . Is the alpha 15a going to be in the same baffle? You say 2, 12" full range speakers, is that per speaker or for both?
Answered by: milo
Date published: 2012-04-27
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