Clearance Item

ESS 689-12P 12" Cast Frame Passive Radiator

Brand:| Model: 689-12P
The ESS 689-12P 12" passive radiator augments a loudspeaker system's bass response, and is an exact cosmetic match for ESS active woofers.
  • Treated and reinforced paper cone with rubber half-roll surround
  • Attractive, sturdy cast aluminum frame keeps components in alignment
  • Linear suspension system for maximum bass and minimum distortion
  • Superior transient response guarantees highly accurate sound reproduction
  • Engineered to match ESS active woofers
Part # 
Weight: 3.2 lbs.  
Order Soon - Only 1 Left In Stock
List Price$114.00
Regular Price$109.85
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Part # 264-626
Qty:  EA
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Product Details

ESS 689-12P 12" Cast Frame Passive Radiator

The ESS 689-12P 12" passive radiator is engineered to match ESS active woofers cosmetically while helping the speaker system achieve excellent bass response. A treated paper cone with half-roll rubber surround provides a fast, well-damped structure that offers an extended lifetime of service.

Passive radiators are a viable alternative to traditional ducted ports. Their paper diaphragm is a mechanical substitute for a port's air load, and tuning is achieved by adding mass instead of adjusting port diameter and length. Passive radiators are especially useful when a speaker's projected optimum port length exceeds available cabinet depth.

ESS – Sound as Clear as Light

Specifications: • Fs: 18 Hz • Vas: 4.44 cu. ft. • Qms: 2.30 • Cms: 0.31 mm/N • Mms: 250 g • Rms: 12.4 kg/s • Sd: 535.8 sq. cm. • Xmax: 11 mm • Dimensions: Overall diameter: 12-3/8", Cutout diameter: 11-1/8", Depth: 3-1/2".

Product Specifications
  • Nominal Diameter12"
ESS 689-12P 12" Cast Frame Passive Radiator
  • BrandESS Labs Inc.
  • Model689-12P
  • Part Number264-626
  • UPC844632007927
  • Product CategoryPassive Radiators
  • Unit of MeasureEA
  • Product Rating
    (1 Reviews)
  • Weight3.2 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 689-12P 12" Cast Frame Passive Radiator
ESS 689-12P 12" Cast Frame Passive Radiator is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from ess 12 droneput it on the back of my ess amt1a.the lows came back again.even with a jbl 12in woofer .
Date published: 2013-05-22
  • 2015-03-26T06:25CST
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Product Q&A

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ESS 689-12P 12" Cast Frame Passive Radiator

Would 2 of these suffice in a bass radiator enclosure using one of your 15" 4-ohm RF subwoofers?

Asked by: Erby
Two of these will work as PRs for that woofer, however the added weight and tuning will be determined by the box size. The power will also be fairly limited due to excursion limits for both the driver and passives.
Answered by: MattP
Date published: 2014-01-03

Where can I get or what should I use for tuning weights? How can the weights be securely attached to the cone and yet be removable for tuning?

Asked by: KVESKY
These are designed as OE replacements and do not have any provisions for tuning. Some of the others have a threaded pole that you can add washers to, but this does not.
Answered by: Chrisf
Date published: 2012-12-04
  • 2015-03-26T06:39CST
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