GRS 12PR-8 12" Poly Cone Rubber Surround Woofer

Brand:| Model: 12PR-8
A GRS 12PR-8 12" 8 ohm polypropylene cone woofer is a good, economical way to repair older speaker systems or create new projects.
  • 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 # 
Weight: 5.55 lbs.  
List Price$24.99
You Save21%
Your Price
Buy 4-up$15.76
Part # 292-422
Qty:  EA
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Product Details

GRS 12PR-8 12" Poly Cone Rubber Surround Woofer

A GRS 12PR-8 12" 8 ohm polypropylene cone woofer is a good, economical way to repair older speaker systems or create new projects.

Product Specifications
  • Nominal Diameter12"
  • Power Handling (RMS)100 Watts
  • Power Handling (max)140 Watts
  • Impedance8 ohms
  • Frequency Response30 to 3,000 Hz
  • Sensitivity84 dB 1W/1m
  • Voice Coil Diameter2"
Thiele-Small Parameters
  • Resonant Frequency (Fs)32 Hz
  • DC Resistance (Re)7.59 ohms
  • Voice Coil Inductance (Le)1.4 mH
  • Mechanical Q (Qms)4.13
  • Electromagnetic Q (Qes)1.82
  • Total Q (Qts)1.26
  • Compliance Equivalent Volume (Vas)3.36 ft.³
  • Maximum Linear Excursion (Xmax)3.5 mm
Materials of Construction
  • Cone MaterialPoly
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter12"
  • Baffle Cutout Diameter11.0625"
  • Depth4.6875"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume2.72 ft.³
  • Sealed F334 Hz
  • Vented Volume31 ft.³
  • Vented F318 Hz
GRS 12PR-8 12" Poly Cone Rubber Surround Woofer
  • BrandGRS
  • Model12PR-8
  • Part Number292-422
  • UPC844632088544
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (37 Reviews)
  • Weight5.55 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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View similar products to the GRS 12PR-8 12" Poly Cone Rubber Surround Woofer
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GRS 12PR-8 12" Poly Cone Rubber Surround Woofer
GRS 12PR-8 12" Poly Cone Rubber Surround Woofer is rated 4.4324 out of 5 by 37.
Rated 5 out of 5 by from Great ReplacementThis woofer was an EXCELLENT replacement in our SUNN wedge monitor.It actually ended up being a total "upgrade" over the original, with much better performance and sound, especially for the price.
Date published: 2015-02-22
Rated 4 out of 5 by from good priceI bought quite a few of these, the first 2 were in an infinite baffle set up and they were awesome, how ever i just built two 3 cubic inch sealed boxes for a set of 3 ways using these as the woofer with them crossed at 225. And honestly im very disappointed, the tweeters and mids sound great but the bass is very weak especially considering i have another set of tower 2 ways that have 2 dayton 5.25s crossed at 2500 and them little speakers make this 12 sound like a cell phone speaker.........pretty sorry if ya ask me, i would NOT recommend them for any application with a box BUT these do work very very well for infinite baffle so yeah they are a great buy but only in certain applications
Date published: 2014-11-06
Rated 4 out of 5 by from seem to be good quality replacements.The bass isn't as I expected but these are still good replacement speakers.
Date published: 2014-10-21
Rated 5 out of 5 by from More than what I expected!I purchased these to replace the woofers in a set of Pioneer CS-G301WAII 3-way bookshelf speakers. These are a serious upgrade to these relatively low-end bookshelf speakers. I couldn't be happier. I'm not sure anything could have been a better replacement at any price for these particular speakers. No modification required at all. Balanced response with plenty of very low frequency bass extension when the music requires it. Highly recommended!
Date published: 2014-10-18
Rated 5 out of 5 by from Just RightPerfectly suited my small venue setup. Almost plug and play. Up and running in less than an hour.
Date published: 2014-10-11
Rated 5 out of 5 by from cant be beat for the priceI asked about putting this in a maxima as infinite baffle, partsexpress said it would work well and would sound similar to the old bose sub, so i figured since these things are super cheep i would get 2, and I think one would have been more than adequate, muuuuch better than the stock bose, really shakes things up. Its not the loudest but it is alot louder than stock even with the amp turned down, and the bass is surprisingly smooth, i expected the highs to be good but the lows really came through nicely. Im just blown away at how great they are for how little i paid. I plan on buying more just to have and eventually finding a use for it
Date published: 2014-08-13
  • 2015-05-23T06:49CST
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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 12PR-8 12" Poly Cone Rubber Surround Woofer

what would be louder, 4 of these on 500 rms, or 3 of the grs 12sw-4s on 500 rms? Will these handle being given around 100 rms being slammed on or no

Asked by: john88888
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: 2015-04-14

how do these compare to the grs 12sw-4 spl wise when being used in a car subwoofer application. 

Asked by: john88888
The GRS 12SW-4 will have a higher SPL over the GRS 12PR-8.
Answered by: MattW
Date published: 2015-04-10

how would this do on a 100w rms amp in a sealed car application for a minivan? Would one of them fill out the lows? Im not looking for droning 30 hz notes just a good filler

Asked by: jimbo44444
Yes, this will work well and one will be enough for you.
Answered by: MattW
Date published: 2015-04-08

whats the magnet weigh ?

Asked by: vette 79
The magnet weight is not provided for this product. Usually it is about 80% of the total driver weight. Based on size alone I would say the magnet is probably about 30 oz.
Answered by: MattP
Date published: 2015-01-01

Wats the smallest. Cubic feet box these can be in... i want to run like 10 of them in a spl box ... just wanna be cheap..

Asked by: slam314
You will have to use an underdamped, high Q design for these woofers. I would recommend 1.5-2 cubic feet per woofer sealed and heavily stuffed.
Answered by: MattP
Date published: 2014-08-12

How deep is this woofer and would it work in an open baffle stereo console?

Asked by: ekeltto
This woofer is about 4-5/8" deep and it will work well in an open baffle application.
Answered by: MattP
Date published: 2015-01-01
  • 2015-05-23T07:07CST
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