GRS 10PR-8 10" Poly Cone Rubber Surround Woofer

Brand:| Model: 10PR-8
Many popular, classic 10" speaker designs can be replaced or upgraded with a GRS 10PR-8 poly cone woofer.
  • 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: 4.85 lbs.  
List Price$20.99
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Your Price
Buy 4-up$13.24
Part # 292-421
Qty:  EA
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Product Details

GRS 10PR-8 10" Poly Cone Rubber Surround Woofer

Many popular, classic 10" speaker designs can be replaced or upgraded with a GRS 10PR-8 poly cone woofer. Thanks to their carefully optimized parameters, GRS 10PR-8 10" polypropylene cone woofers with butyl rubber surrounds offer a high degree of compatibility when used as replacement speakers—they also provide excellent performance in new projects, too.

Product Specifications
  • Nominal Diameter10"
  • Power Handling (RMS)80 Watts
  • Power Handling (max)115 Watts
  • Impedance8 ohms
  • Frequency Response35 to 3,000 Hz
  • Sensitivity85 dB 1W/1m
  • Voice Coil Diameter1.5"
Thiele-Small Parameters
  • Resonant Frequency (Fs)37 Hz
  • DC Resistance (Re)7.58 ohms
  • Voice Coil Inductance (Le)1.12 mH
  • Mechanical Q (Qms)4.8
  • Electromagnetic Q (Qes)1.5
  • Total Q (Qts)1.14
  • Compliance Equivalent Volume (Vas)2.15 ft.³
  • Maximum Linear Excursion (Xmax)3 mm
Materials of Construction
  • Cone MaterialPoly
  • Surround MaterialRubber
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter10"
  • Baffle Cutout Diameter9.25"
  • Depth4.125"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume2.11 ft.³
  • Sealed F339 Hz
  • Vented Volume16.5 ft.³
  • Vented F321 Hz
GRS 10PR-8 10" Poly Cone Rubber Surround Woofer
  • BrandGRS
  • Model10PR-8
  • Part Number292-421
  • UPC844632088537
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (22 Reviews)
  • Weight4.85 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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GRS 10PR-8 10" Poly Cone Rubber Surround Woofer
GRS 10PR-8 10" Poly Cone Rubber Surround Woofer is rated 4.4545 out of 5 by 22.
Rated 5 out of 5 by from Far Surpassed ExpectationI found an old pair of JBL Model L50 speakers at a yard sale for $5 each. The tweeters and mids were fine, but the woofers were missing. I bought two of these these to try and end up with a pretty good sounding pair for $40. What I ended up with is a pair of speakers that I would have been happy to pay $500 for! I understand that a good percentage of the sound quality is due to the extremely well designed and constructed cabinets and the quality of the JBL electronics, including the crossovers, but I imagine if the woofers were terrible, they would sound terrible in even the best of cabinets. The low bass is a pleasing rumble, with slightly tighter mid bass. The mid to mid high bass is just a little punchy, not in an unpleasant way, but rather in a way that makes the rhythm sound more lively and focused. The higher bass is a bit absent, but is easily remedied with judicious equalization. I would have to imagine that very few people would dislike this woofer, especially at this price point, and it should sound great in any decent installation.
Date published: 2014-07-02
Rated 3 out of 5 by from Ehhhh good and badPretty good replacement speaker. Let me rephrase that, pretty good for the money. I used this speaker as a replacement for the 10'' woofers in a set of advent legacy 1 speakers. While these do an admirable job for the money, the sound quality they provide compared to the original woofers is worse. All in all the vocals and midrange are of good quality, but they break up at the higher end of 4khz, there is also a severe lack of bass for a woofer of this size. Like I said, good for the money but I would not use this as a replacement for higher end drivers, even in older speakers.
Date published: 2014-05-11
Rated 5 out of 5 by from Killer deal!You cant beat the price. The best bang for the buck.
Date published: 2014-01-30
Rated 5 out of 5 by from Fantastic for Open Baffle designsI bought 4 of these woofers because they were cheap and I didn't have any 10" drivers at the time. You can't have too many speakers lying around. Right? After noticing the fairly high Qts I thought they would be suitable in an Open Baffle design that I had on the drawing board for over a year. Two drivers mounted vertically on a 15" x 28" baffle with 4" wings on each side and sitting 3' out from the back and side walls give an amazingly deep and tight bass, digging way down to 28Hz without any equalisation. The efficiency is quite low, as you would expect, so I would recommend using an active crossover and bi-amping.
Date published: 2014-01-26
Rated 4 out of 5 by from Solid for the $$Used these as a temporary replacement for a pair of Infinity Ref. Fives---worked fairly well despite being slightly smaller outer dimensions for the opening...recommended.
Date published: 2014-01-22
Rated 5 out of 5 by from very good buy for your moneyFor 10$ you really cannot go wrong at all.. Make sure u get as close as u can of the box size it tells u to put it in. At first i thought they were not very good in a different pair of boxes i had, but i put them in a 12" depth. 16" wide. 34" high.in inches. box using 3/4" medium density fiberboard.. they sounded great to me..i put a 2" port in them as well for lower bass response.just starting out here..
Date published: 2013-10-29

Product Q&A

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who own this product or have experience with it.
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GRS 10PR-8 10" Poly Cone Rubber Surround Woofer

Would you recommend these for replacement in Ultraphase 3 way speakers?

Asked by: Jazzman251
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: 2014-08-13

can you connect these to a JVC SK 50 cabinet without soldering? I haven't got the equipment

Asked by: flashlight
Yes you can use 3/16" female crimp style disconnects to connect this woofer instead of solder.
Answered by: MattP
Date published: 2014-07-24

would this be a fairly good replacement for a JVC SK 50 cabinet?

Asked by: flashlight
This woofer will work well if you stuff the port on the cabinet. The Dayton Classic 10" will be a better choice if you want to leave the port open.http://www.parts-express.com/dayton-audio-dc250-8-10-classic-woofer--295-315
Answered by: MattP
Date published: 2014-07-23

What cabinet size work best for this woofer in a 3 way system to go down to 30 Hz?

Asked by: Big_Louis_1971
The sealed cabinet volume online of 2.11 cubic feet will allow this to reach low 30's in room.
Answered by: MattP
Date published: 2014-07-21

I would like an good economical replacement speaker for a pioneer 10" 25-764a?? I was considering your GRS paper or poly 10" speakers..

Asked by: philoxl
The GRS woofers are a very practical replacement for most 10" OEM woofers on the market. They are best suited for sealed enclosures however, so if the enclosures you have are ported I would recommend stuffing the ports for a smoother bass response. You can always try it both ways and use whichever method you like the sound of.
Answered by: MattP
Date published: 2014-05-06

so.. how awesome would 2 of these be in a 1.54  cubed sealed box hooked up to one of those lepai 45 watt amps. just not gonna happen? thought it could be fun but it sounds like they will suffocate. sounds like they need there space on so little power.

Asked by: Geoffbeefpatty
Two of these in that volume will have in room response into the 30's and a bit of a peak around 80 Hz which will give you a natural bass boost type sound.
Answered by: MattP
Date published: 2014-02-19

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