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GRS 8PR-8 8" Poly Cone Rubber Surround Woofer

Brand:| Model: 8PR-8
Overview
The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications.
Highlights
  • Polypropylene cone for perfect balance of stiffness, mass, and self-damping
  • Butyl rubber surround ensures high excursion and long term durability
  • Stamped steel frame keeps components in perfect alignment
  • Optimized motor features high-energy ceramic ferrite magnet, vented pole piece
Part # 
292-428
Weight: 3 lbs.  
IN STOCK
List Price$16.99
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Part # 292-428
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Product Details

GRS 8PR-8 8" Poly Cone Rubber Surround Woofer

The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications. Thanks to its carefully optimized parameters, the GRS 8PR-8 8" polypropylene cone woofer with butyl rubber surround offers a high degree of compatibility when used as a replacement speaker—it also provide excellent performance in new projects, too.



Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)65 Watts
  • Power Handling (max)90 Watts
  • Impedance8 ohms
  • Frequency Response40 to 5,000 Hz
  • Sensitivity85 dB 1W/1m
  • Voice Coil Diameter1.5"
Thiele-Small Parameters
  • Resonant Frequency (Fs)52 Hz
  • DC Resistance (Re)7.58 ohms
  • Voice Coil Inductance (Le)1.09 mH
  • Mechanical Q (Qms)4.77
  • Electromagnetic Q (Qes)1.45
  • Total Q (Qts)1.11
  • Compliance Equivalent Volume (Vas)0.76 ft.³
  • Maximum Linear Excursion (Xmax)3 mm
Materials of Construction
  • Cone MaterialPoly
  • Surround MaterialRubber
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter8"
  • Baffle Cutout Diameter7.32"
  • Depth3.44"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.81 ft.³
  • Sealed F354 Hz
  • Vented Volume5.54 ft.³
  • Vented F329 Hz
GRS 8PR-8 8" Poly Cone Rubber Surround Woofer
  • BrandGRS
  • Model8PR-8
  • Part Number292-428
  • UPC844632088520
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (63 Reviews)
  • Weight3 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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Reviews

GRS 8PR-8 8" Poly Cone Rubber Surround Woofer
GRS 8PR-8 8" Poly Cone Rubber Surround Woofer is rated 4.619 out of 5 by 63.
Rated 5 out of 5 by from Exc replacement for Altec Lansing 887a "Capri"Used these to replace drivers in my Altec Lansing 887a "Capri" speakers that I recently picked up on Craigslist. I wanted a paper woofer and rubber surround, but PE only had poly cone with rubber surround, or paper woofer with foam surround. Anyway, these made for a painless, great sounding replacement.
Date published: 2015-05-18
Rated 2 out of 5 by from Can't go wrong with this woofer for the priceInstalled the 8" woofer and pizo tweeterin self manufactured Truck boxesas replacements from 30 years agoThere fine but the woofers fall a bit short inperformance for my critical earsThink I would like to upgrade to a morepremium set of driversCan your Tech support personelcontact me with recommendation for are selection.ThanksJohn
Date published: 2015-05-01
Rated 5 out of 5 by from Extremely Happy Customer !!!I received these 8" woofers in excellent packaging.I was amazed at their great & clear sound after installing them into the speaker cabinet.I wouldn't hesitate to buy from Parts Express again. They have great quality products & competitive pricing. Well done Parts Express !!!
Date published: 2015-04-20
Rated 4 out of 5 by from Works greatI purchased a pair of these to replace speakers that were installed in old old kenwood speakerboxes. I estimate the boxes were from the 1960's or 1970's. The old foam surround was rotten and I was surprised the speakers actually worked. One did stop working so I got these.I plugged them in and they work fantastic... could not beat the price either... Hopefully these will last me the 30+ years the originals did...I will add that I believe they measure speakers differently than they used to... these were about 3/16" smaller in diameter than my originals, but they still bolted up, I just had to drill new mounting holes in the cabinet.
Date published: 2015-04-03
Rated 5 out of 5 by from Nice woofer for the moneyUsing them in an 8" 2way cabinet crossed over at 100hz to a subwoofer. Nice tight mid bass and crystal clear midrange.
Date published: 2015-01-11
Rated 5 out of 5 by from Great fit for an old 1960s Truetone consoleI used these speakers to replace the decayed old paper speakers in a 1960s Truetone console stereo. They fit perfectly without having to drill new mounting holes! I was very impressed. Sound is good for my needs (AM/FM/Phono). Would definitely recommend.
Date published: 2014-12-01
  • 2015-05-30T07:30CST
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Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
GRS 8PR-8 8" Poly Cone Rubber Surround Woofer

I'm looking for a simple combination for these woofers. 2 way? 3 Way? Tweeter? Crossover? Midrange? I'm running a Sansui AU999 Amp. I just want low level clean sound that fills the room. Budget minded of course, what combination would you suggest? 

Asked by: Madison44
Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-04-29

What is the magnet weight on the GRS 8PR-8 8" Poly Cone Rubber Surround Woofer???

Asked by: Shakey1
Magnet weight is not listed for this model unfortunately. I would say it is 20-25 oz.
Answered by: MattP
Date published: 2015-03-24

will this fit my boston accos. a60 a70 speakers

Asked by: fingers 64
We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-03-16

Is there a datasheet for this? I am wondering what the exact outside diameter is, as my rebate has a diameter of 224mm and I have not yet managed to find a speaker with similar dimensions.

Asked by: shaneh711
We do not have a datasheet for this woofer, but it measures exactly 8" in diameter which is 203.2mm. A diameter of 224mm is 8.82", so you will need an 8" woofer with a slightly oversized frame. We have a few options that are 8-1/2" and 8-3/4", but nothing that will be exactly 8.82". There are two options below that will be the closest at 8.78".http://www.parts-express.com/dayton-audio-rs225-8-8-reference-woofer--295-356http://www.parts-express.com/dayton-audio-rs225p-8-8-reference-paper-woofer-8-ohm--295-367
Answered by: MattP
Date published: 2015-02-13

How well will these work as replacements for original Advent Heritage woofers instead of refoaming the orignals? Thanks

Asked by: BobAdvent
We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-01-21

Replacement 8 inch woofers for old superscope ported speakers

Asked by: craig54
This requires a bit more information in order to proceed. Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-01-09
  • 2015-05-29T09:08CST
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