ESS AMT Woofer 689-1220

12" ESS Genuine Factory Replacement Woofer, 689-1220

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12" ESS Genuine Factory Replacement Woofer, 689-1220

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Part Number: ESS-689-1220

Availability: 0 Out of Stock

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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

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4.8

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owner

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

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Reviewed by: peter from long island n.y. on 8/13/2013

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.

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Reviewed by: Ken from Memphis on 10/19/2017

Ess replacement woofers

Great replacements and look good too.

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Reviewed by: John from Denver on 11/2/2017

Perfect Craftsmenship

Item arrived on time and in perfect condition. Nothing but praise.

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Reviewed by: oa from Seatle,WA on 10/23/2015

retired

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.

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Mark Randazzo from SAN JOSE on 5/27/2018

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: Thomas whitt from Spartanburg on 9/6/2017

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) Charles Pelosi from New Jersey on 12/5/2017

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.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: John from NM on 5/3/2018

customer

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? 1 of 1 Found Helpful

Reviewed by: Gary Schmitt from Shingle Springs, CA on 8/10/2018

Heil Air Motion re-build

The speakers and passive radiators fit perfectly and look great. Once again I have the incredible sound system I have been missing for a long time.

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Reviewed by: Joel Sparkman from Port St Lucie Fl on 7/25/2022