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Eminence Commonwealth 12" 225W Guitar Speaker

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The Eminence Commonwealth 12" Guitar Speaker delivers warm and rich tone that is very clean and well-defined. This Eminence speaker has a very full and smooth presence. Very little cone break-up, but ... Click To Read More About This Product

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The Eminence Commonwealth 12" Guitar Speaker delivers warm and rich tone that is very clean and well-defined. This Eminence speaker has a very full and smooth presence. Very little cone break-up, but likes Overdrive. Clean, warm, full, non-distorted, unadulterated guitar tone for all genres.


  • Voice Coil Diameter: 4", 101.6mm
  • Magnet Weight: 109 oz.
  • Power Rating.: 225W
  • Sensitivity: 100
  • Specification
  • Nominal Basket Diameter: 12", 304.8mm
  • Nominal Impedance*: 8 ohms
  • Power Rating**: 225W
  • Resonance: 50Hz
  • Usable Frequency Range: 50Hz-4kHz
  • Sensitivity***: 100
  • Magnet Weight: 109 oz.
  • Gap Height: 0.29", 7.2mm
  • Voice Coil Diameter: 4", 101.6mm
  • Thiele & Small Parameters
  • Resonant Frequency (fs): 50Hz
  • DC Resistance (Re): 6.34
  • Coil Inductance (Le): 0.46mH
  • Mechanical Q (Qms): 6.61
  • Electromagnetic Q (Qes): 0.35
  • Total Q (Qts): 0.33
  • Compliance Equivalent Volume (Vas): 90 liters / 3.2 cu. ft.
  • Peak Diaphragm Displacement Volume (Vd): 36cc
  • Mechanical Compliance of Suspension (Cms): 0.24mm/N
  • BL Product (BL): 15.7 T-M
  • Diaphragm Mass inc. Airload (Mms): 43 grams
  • Efficiency Bandwidth Product (EBP): 143
  • Maximum Linear Excursion (Xmax): 0.7mm
  • Surface Area of Cone (Sd): 519.5 cm2
  • Mounting Information
  • Recommended Enclosure Volume:
  • Sealed: Acceptable
  • Vented: Acceptable
  • Overall Diameter: 12.28", 312.0mm
  • Baffle Hole Diameter: 11.08", 281.3mm
  • Front Sealing Gasket: fitted as standard
  • Rear Sealing Gasket:
  • Mounting Holes Diameter: 0.27", 6.8mm
  • Mounting Holes B.C.D.: 11.69", 297.0mm
  • Depth: 5", 127mm
  • Net Weight: 21.5 lbs., 9.8 kg
  • Shipping Weight: 23.2 lbs., 10.5 kg
  • Materials of Construction
  • Aluminum voice coil
  • Polyimide former
  • Ferrite magnet
  • Vented core
  • Die-cast aluminum basket
  • Paper Cone
  • Cloth cone edge
  • Aluminum dust cap
  • *Please inquire about alternative impedances.
  • **Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, non-temperature controlled environment.
  • ***The average output across the usable frequency range when applying 1W/1M into the nominal impedance. Ie: 2.83V/8ohms, 4V/16ohms.
  • Eminence response curves are measured under the following conditions: All speakers are tested at 1w/1m using a variety of test set-ups for the appropriate impedance | LMS using 0.25" supplied microphone (software
  • calibrated) mounted 1m from wall/baffle | 2ft. X 2ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction | Hafler P1500 Trans-Nova amplifier | 2700 cu.ft. chamber with
  • fiberglass on all six surfaces (three with custom-made wedges)
Pro Coverage
Manufacturer's Warranty
7 year parts and labor warranty against defects on all speakers sold under Eminence name.

Customer Reviews

Review Snapshot

by PowerReviews
EminenceCommonwealth 12" 225W Guitar Speaker

(based on 4 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 1 Stars



Reviewed by 4 customers

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(13 of 14 customers found this review helpful)


Commonwealth 12 or JBL E-120?

By Jboy

from Jackson, Ms

Comments about Eminence Commonwealth 12" 225W Guitar Speaker:

I was making my own Baltic Birch Cab like a Hard Truckers, and was looking for that JBL E-120 sound. This speaker delivers the goods with high sensitivity, Clear tone, no breakup, and High RMS wattage. Makes my Fender 65'Twin Reverb sing Like Jerry Garcia's. People often ask me if they are JBL E-120's, they are identical in looks and in TONE. You wont be sorry, don't bother to re-cone some 30 year old speaker with lower sensitivity and unknown outcomes. This does the job perfectly, and for less money. They are LOUD and you will NEVER BLOW THEM.

(3 of 4 customers found this review helpful)


Commonwealths are the best!

By BestFather

from Springboro, Ohio

Comments about Eminence Commonwealth 12" 225W Guitar Speaker:

My daughter and I built a 2 x 12 guitar cabinet using birch plywood (excellent cabinet work with a mandarin orange water based stain finish - superb!). We evaluated many speakers and chose the commonwealths over everything; even JBL and higher priced Celestions. We made the right choice. Very high power handling, excellent tonal range and they are beautiful. They are very heavy though, so make sure your cabinet is sturdy. We will build another cabinet in 3 weeks. We will use either two more commonwealths or the eminence BassLite CA2010. Yes, bass speakers for a guitar cabinet. These two speakers are the best kept secret out there.

(2 of 3 customers found this review helpful)


Beautiful tone


from Bakersfield

Comments about Eminence Commonwealth 12" 225W Guitar Speaker:

After being dissatisfied and unable to get the tone I wanted, I bought a pair of these to put in my Marshall 1960 cab. I removed two of the Celestion G12T-75's, and installed these in a X pattern. After breaking them for 2 hours face down, with some modulating sine waves, I plugged in my Les Paul. The depth, and musicality that I was reaching for was at last within my reach. I played all my guitars, with the variety of different pickups, and was stunned. So please, do not buy these. I don't want to share my tone with anybody.

(2 of 2 customers found this review helpful)


Guitar Center not standing up to what they sell !!!


from Paradise CA

Comments about Eminence Commonwealth 12" 225W Guitar Speaker:

I bought this speaker for a Fender Hot Rod Deluxe and it was back ordered, when it came in I picked it up at the store Chico Ca and put this in the amp, first it was very chimney and lots of over tone , then it got better and after 3 days of playing the sound got really Great lots of nice mids and bass very articulate, really was very happy then it got a buzz in the sound even at low volumes in a open low E note, I thought it needed more break in time so I played it for a week and it still has a buzz, even out of the amp on my bench it has a buzz open low E note Buzzing. Called the store , they would not accept returns and it had only been 15 days !!!! Had to call Eminence and got a Ra # and have to ship it to them, they will fix or replace and ship back to me. Guitar Center would not do anything !!!!

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