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12" ESS Genuine Factory Replacement Woofer, 689-1220

Part Number:ESS-689-1220
12" ESS Genuine Factory Replacement Woofer, 689-1220
ESS AMT Woofer 689-1220
12" ESS Genuine Factory Replacement Woofer, 689-1220
Your Price:$139.00


In Stock: 7

ESS Factory AMT Series 12" Woofer Part # 689-1220
  • ESS AMT Speaker 12" Woofer Part # 689-1220
  • Original ESS AMT design, treated paper cone, rubber surround
  • Factory new direct replacement woofer
  • Cast aluminum frame 
  • Size: 12.375"
  • Cut-out: 11.125"
  • Depth: 5.6"
  • Voice coil: 2", 4 layer
  • Magnet: 40 oz
  • Impedance: 4 ohms, Re: 3.9 ohms
  • Power: 200 watts RMS, 300 watts max
  • Sensitivity: 91.5 dB, 1 watt, 1 meter
  • Le: .73 mH, Fs: 24 Hz, Vas: 6.69 cu. ft., Qms: 4.9, Qes: .52, Qts: .47, Xmax: 6mm 

5 Stars
I purchased the EssAmt1A speakers new in 1976 and I still have not found a speaker to replace the quality and sound of these superb speakers. I had them in storage in my HOT attic for 12 yrs. and found the the cone suspension rings deteriorated, I ordered a new replacement 12" woofer, installed it and the speaker sound just as good now as it did when new. Thank you, Thank you
Did you find this helpful?  10 of 10 Found Helpful
Reviewed by:  from long island n.y.. on 8/13/2013
5 Stars
Replacement speaker
Purchased an ESS replacement speaker for a 1970’s era ESS AMT Monitor speaker. The speaker was a perfect fit and sound matches beautifully with the other original speaker. Simply Speaker provided a great price and quick shipping.
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from Memphis . on 10/19/2017
5 Stars
Ess replacement woofers
Great replacements and look good too.
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from Denver . on 11/2/2017
5 Stars
Perfect Craftsmenship
Item arrived on time and in perfect condition. Nothing but praise.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Seatle,WA. on 10/23/2015
5 Stars
Computer tec
The speakers are really amazing guality. Well pleased. I would call and talk to a person to make sure you understand what's getting shipped out to you
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Spartanburg . on 9/6/2017
5 Stars
I have had the cabinets for about 20 years with some cheap replacement speakers. I found that the quality of the customer service and the woofer to be of top quality! The price was most reasonable (less than I expected for kind of speaker)! Thanks to the staff at simply speakers for your help and advice. Greg Blalock
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Reviewed by:  from Kentucky. on 4/23/2015
4 Stars
Quality Item
Great replacement speaker at a reasonable price. Better quality than the original. Has slightly higher DB output and a durable rubber surround (instead of foam) and a treated cone surface. I also love the ESS lettering on the cone. I really only needed one replacement but liked the replacement so much I bought the other. Now my ESS AMT 1a Bookshelf's are exactly matched and are better than new.
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Reviewed by: (Verified Buyer)  from New Jersey. on 12/5/2017
4 Stars
Rec'd factory replacement woofer well packed, undamaged, and on time. Worked well once installed. Slight problem was the metal cage around the woofer was slightly different than the cast outline of an AMT-1A original woofer. I had to modify the face of the speaker box to slightly enlarge the recessed form fit pocket which the woofer fits into. Not a major issue, fixed with a dremel tool, just a slight annoyance. My speaker system is greater than 40 yrs old, and I suspect that ESS changed their design somewhere over the years.
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Reviewed by:  from NM. on 5/3/2018
5 Stars
I've had my ESS AMT monitors since the 70s but the cones were bad and the passive radiators too. Decided to purchase new woofers and redo the radiators. So glad I did. They sound just like new and man do they sound good.
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Reviewed by:  from SAN JOSE. on 5/27/2018
5 Stars
Hearing some disturbing distortion coming from one of my ESS AMT 1D woofers, I was very worried about finding a replacement for these twenty something year old speakers. . After looking through other choices, I couldn't be more pleased that I chose Simply Speakers. They promptly answered my questions and the delivery was as promised. The replacement speaker works perfect and I've returned to my "as clear as light" sound. A VERY satisfied customer.
Did you find this helpful? 
Reviewed by:  from Shingle Springs, CA. on 8/10/2018



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