Eminence American Standard Beta 12A 12 Inch Speaker 250 Watts 8 Ohm

Shop Eminence American Standard Beta 12A 12 Inch Speaker 250 Watts 8 Ohm from AMS with 0% Interest Payment Plans and Free Shipping.

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MSRP: $114.99
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Product Description

The Eminence Beta 12A Speaker features optimized frequency response and power handling for use as a replacement speaker for two and three way speakers systems, bass and keyboard combo amps, guitar combo amps, and stage monitors. 8 ohms, 500W Program.

Performance optimized for sound reinforcement systems. Also suitable for lead and bass guitar, keyboards, guitar combos, club music systems and stage monitors.

Materials of Construction

  • Kapton coil former
  • Ferrite magnet
  • Pressed steel basket
  • Polyamide-imide coated copper voice coil
  • Paper cone/cloth cone edge
  • Solid composition paper dust cap

See all items from Eminence
Helpful Info about the Manufacturer
Phone:  502-845-5622 Warranty:  Warranty: 7 years

Product Specifications

Product Specifications


  • Nominal Basket Diameter: 12 inches, 304.8mm
  • Impedance: 8 Ohms
  • Power Rating:
    • Music Program: 500 W
    • Watts: 250 W
  • Resonance: 50Hz
  • Usable Frequency Range: 43Hz - 3.8kHz
  • Average Sensitivity 1W @ 1m: 100 dB
  • Magnet Weight: 34oz.
  • Gap Height: 0.312 inches, 7.94mm
  • Voice Coil Diameter: 2 inches, 50.8mm

Mounting Information

  • Overall Diameter: 12.02 inches, 305.2mm
  • Baffle Hole Diameter: 10.97 inches, 278.6mm
  • Front Sealing Gasket: fitted as standard
  • Rear Sealing Gasket: fitted as standard
  • Mounting Holes Diameter: 0.25 inches, 6.4mm
  • Mounting Hole B.C.D.: 11.63 inches, 295.3mm
  • Depth: 4.47 inches, 113.5mm
  • Shipping Weight: 9.2 lbs., 4.2 kg

Thiele-Small Parameters

  • Resonant Frequency: 50Hz
  • Impedance (RE): 7.07 ohm
  • Coil Inductance (Le): 0.84mH
  • Electromagnetic Q (Qes): 0.57
  • Mechanical Q (Qms): 5.82
  • Total Q (Qts): 0.52
  • Compliance Equivalent Volume (Vas): 114.7 liters, 4.05 cu.ft.
  • Peak Diaphragm Displacement Volume (Vd): 42cc
  • Mechanical Compliance of suspension (Cms): 0.29mm/N
  • BL Product (BL): 11.6 T-M
  • Diaphragm Mass inc. Airload (Mms): 35 grams
  • Equiv. Resistance of mechanical suspension loss (Rms): 1.88N*sec/M
  • Efficiency Bandwidth Product (EBP): 88
  • Voice Coil Overhang (Xmax): 0.8mm
  • Surface Area of Cone (Sd): 532.4cm2
  • Impedance at Resonance (Zmax): 79 ohm

Customer Reviews

Michael B. Submitted: 1/16/2018
Product Rating
Money Well Spent
Product Rating
What is your opinion of this product?
These Will be my second pair of Beta's. I match these to my Fender Super Sonic Tube Amp. My Strat. Sounds Awesome ! Deep Rich Lows, Clear Highs, All this At a Fair Price. Why spend more money. And there made by Eminence ! Enough Said.
Dave Morris Submitted: 7/29/2016
Product Rating
Good price, very good product and great delivery usual!
What is your opinion of this product?
I needed some 12" speakers for our practice room wedge monitors. These were affordable and I received them in 2 days. The sound quality is very good and I consider these a good "bang for the buck" speaker.
nathan webster Submitted: 4/11/2016
Product Rating
Awesome product
What is your opinion of this product?
Great sound but police dont like how loud they are in a peavey amp with 2 of these lol
HHansen from R.I. Submitted: 4/5/2013
Product Rating

All around performer
Industry standard for this price range, well made.
At home in a bass rig, PA or guitar cabinet.
Deep bass with very good highs. I use 2 in a '68 Bassman cabinet and play bass and guitar as required.
Your general opinion of this product.
With 250 watts per speaker your covered for most any amp when used in tandum.
Jimmy from NY, USA, Submitted: 8/27/2010
Product Rating

Great for a custom cab
So far, no complaints. It has handled everything I thrown at it. Plenty of gasket on the front.. the back has less, but no matter.
I put this into a custom built cabinet that I built. The specs for the price present an amazing value. Not too heavy weight wise, low resonant frequency, good frequency response and SPL sensitivity.
Very easy to use. I didn't have a manual of course, but Eminence has cabinet designs on their website that helped tremendously. After balancing several speakers, from basslite to Kappa, I settled on this speaker. Eminence only gives a volume of space required.. the rest is up to you.
I thought a bass speaker was only good for bass.. WRONG.. it sounds great for guitar.. doesn't require a horn for slap. My cabinet design no doubt contributes to this, but none the less.. very shocking. Everyone I've demo'd it for has been absolutely floored.
Shawn Meister--Guitar for Blackmass Mafia & UNDERBELLY from Pocono Lake, PA. / Philadelphia, PA. U.S.A., Submitted: 7/18/2009
Product Rating

Eminence is the best hands down
Top Quality, I won't ever buy another brand ever.
250W What more could you want & I'm not electrical savvy in any way. but installing them is very simple.
The Manual was of little help but the way they are laid out when you replace a speaker it's self explanatory what goes where. It took me 1/2 Hour to swap out all 4 of my speakers.
I custom modified my Marshall 1960A Lead cab with these speakers. The vintage 30's were ok but if your playing down tuned guitars or like me 7-string or 8-string Guitars through a POD XT pro Rack Mount with a 500 watt Power amp, your golden, amazing bottom end, very tight sounding & they never break up or crackle on you. I set my cab up for stereo, left channel, right channel & these speakers are 250w a piece, that means my Left channel handles 500w and my Right channel handles 500w, a thousand watt cab with a 500w Crown Power amp. It's a Beast that sounds better than any custom guitar cabs on the market today. I dare anyone to say different, if you are going for extreme modern heavy guitar tone, these are the speakers you need & want.


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