Clearance Item

ESS 689-1012 10" Cast Frame Woofer Speaker

Brand:| Model: 689-1012
The ESS 689-1012 10" woofer mates perfectly with the ESS AMT-1 Air Motion Transformer, as well as offering great performance in almost any high-quality audio application.
  • Treated and reinforced paper cone with rubber half-roll surround
  • Attractive, sturdy cast aluminum frame keeps components in alignment
  • Pure copper 1-1/2" voice coil wound on black aluminum former provides high power handling
  • Linear suspension system and bumped back plate for maximum bass
  • Highly conductive/fatigue resistant woven tinsel leads
  • Superior transient response guarantees highly accurate sound reproduction
  • Drop-in replacement for the ESS AMT Monitor speaker system
Part # 
Weight: 7 lbs.  
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Product Details

ESS 689-1012 10" Cast Frame Woofer Speaker

Famous for the superb Air Motion Transformer mid/high transducer, ESS also manufactures woofers that match the AMT's quality and performance. The ESS 689-1012 10" woofer features a specially coated and reinforced paper cone with half-roll rubber surround, the combination of which provides a perfect balance of mass, rigidity, and good linear excursion capabilities.

A cast aluminum frame protects and aligns the woofer's critical moving components, as well as avoiding the diversion or dissipation of the 35 oz. ceramic magnet's high motor strength. Highly conductive and fatigue resistant woven tinsel leads establish a reliable connection between the high-power 1-1/2" copper voice coil and the oxidation resistant gold-plated input terminals.

Product Specifications
  • Nominal Diameter10"
  • Power Handling (RMS)80 Watts
  • Power Handling (max)160 Watts
  • Impedance4 ohms
  • Frequency Response43 to 2,000 Hz
  • Sensitivity90.6 dB 1W/1m
  • Voice Coil Diameter1.5"
Thiele-Small Parameters
  • Resonant Frequency (Fs)27 Hz
  • DC Resistance (Re)3.4 ohms
  • Voice Coil Inductance (Le)1.2 mH
  • Mechanical Q (Qms)4.1
  • Electromagnetic Q (Qes)0.54
  • Total Q (Qts)0.48
  • Compliance Equivalent Volume (Vas)1.75 ft.³
  • Maximum Linear Excursion (Xmax)4 mm
Materials of Construction
  • Cone MaterialCoated Paper
  • Surround MaterialRubber
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerAluminum
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter10.625"
  • Baffle Cutout Diameter9.375"
  • Depth4.5"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.93 ft.³
  • Sealed F345 Hz
  • Vented Volume2.51 ft.³
  • Vented F322 Hz
ESS 689-1012 10" Cast Frame Woofer Speaker
  • BrandESS Labs Inc.
  • Model689-1012
  • Part Number264-620
  • UPC844632092695
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (3 Reviews)
  • Weight7 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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ESS 689-1012 10" Cast Frame Woofer Speaker
ESS 689-1012 10" Cast Frame Woofer Speaker is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Get LowI have matched these up with my 811 ALTEC HORNS. Crossover @ about 800. I built a 2.5 cubic ft box with a 15" long 4"Dia.port. They sound great in my 15x15 room.
Date published: 2013-08-22
Rated 5 out of 5 by from even better then the original factory speakerBought these to repair a pair of 30 year old ESS AMT Towers where woofers were completely deteriorated. These replacements wer much better build quality and components then the original factory. It was an easy replacement however, the original cutout was round while the replacements had bump outs on the 4 corners. I had to chisel away some of the wood to make the replacements fit. Also, new woofers stick out a bit further then the originals - the surrounds are thicker and screw heads we not recessed into the frame so I had to set the grill cover out a bit. Overall a bit more work that I anticipated but well worth it. Shipping was very fast - I got the product within 3 days of placing the order.
Date published: 2012-03-02
Rated 5 out of 5 by from Best choice for my speakersBought the speakers instead of glueing the old chassies and centering them.You'll get a gilded terminals, coated membrane and casted aluminium chassie.No trouble at all - just change and enjoy.Btw.: don't forget to change the capacitors (10µF and 2,2µF) to high quality ones and you're done.Roland
Date published: 2012-01-02
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Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
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please email  for a prompt reply.
ESS 689-1012 10" Cast Frame Woofer Speaker

Hi is this price $139.80 per pair or a single woofer only?

Asked by: Em05
Yes they are sold individually.
Answered by: TomI
Date published: 2014-12-30

.95 sealed?

Asked by: dave3850
Yes, you can use this driver in that volume. That is close to the predicted "optimal" sealed enclosure for this driver.
Answered by: DaytonAudio_Rory
Date published: 2014-12-16

Whose equations were used to arrive at a vented volume of 2.51 ft.³?

The Thiele-Small specs I measured on my pair are QTS= .51, VAS= 2.38, FS= 40hz. The resulting cabinet size (using the equation Vb = Qts 2.87 x 15 x Vas) is 5.2ft.³. I am very disappointed.
Asked by: clintonforsythe
This volume was determined using the manufacture specs from our website and BassBox 6 Pro. When I punch in the parameters and hit "Suggest" I get a volume of 2.516 cubic feet with a tuning frequency of 21 Hz and F3 of 22 Hz. Your Vas is much higher than the manufacturer, how did you calculate this number?
Answered by: MattP
Date published: 2013-11-01

i need the xmax specification for the ESS 689-1012 please.

Asked by: clintonforsythe
The Xmax on this driver is 4mm.
Answered by: MattP
Date published: 2013-07-29

Are these the correct replacement for ESS AMT 10 b monitor woofers?

Asked by: mark58
Yes these will work well as replacements in those speakers.
Answered by: MattP
Date published: 2013-07-27

Proper Replacement For AMT-4 ?

I need replacement woofers for ESS Heil AMT-4's, are these a good choice ?Thank you !
Asked by: Skittorius
Yes these will work well for that application.
Answered by: MattP
Date published: 2013-03-20
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