Manuals & Resources

GRS 8PF-8 8" Paper Cone Foam Surround Woofer

Brand:|Model: 8PF-8
If you are looking for a low-cost, high-performance 8" replacement speaker, check out the GRS 8PF-8!
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List Price$13.99
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Part # 292-408
  • Perfect for use in sealed-box home theater and music systems
  • Poly-laminated paper cone, treated foam surround, and polymer dust cap
  • Smooth frequency response with minimal cone breakup

Product Details

GRS 8PF-8 8" Paper Cone Foam Surround Woofer

If you are looking for a low-cost, high-performance 8" replacement speaker, check out the GRS 8PF-8! Thanks to their carefully optimized parameters, GRS 8PF-8 8" poly-laminated paper cone woofers offer a high degree of compatibility when used as replacement speakers—they also provide excellent performance in new projects, too.

Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)100 Watts
  • Power Handling (max)200 Watts
  • Impedance8 ohms
  • Frequency Response55 to 6,000 Hz
  • Sensitivity87 dB 1W/1m
  • Voice Coil Diameter1.5"
Thiele-Small Parameters
  • Resonant Frequency (Fs)51 Hz
  • DC Resistance (Re)7.59 ohms
  • Voice Coil Inductance (Le)1.11 mH
  • Mechanical Q (Qms)4.58
  • Electromagnetic Q (Qes)1.17
  • Total Q (Qts)0.93
  • Compliance Equivalent Volume (Vas)0.95 ft.³
  • Maximum Linear Excursion (Xmax)3 mm
Materials of Construction
  • Cone MaterialPaper
  • 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 Volume1.3 ft.³
  • Sealed F354 Hz
  • Vented Volume4.91 ft.³
  • Vented F330 Hz
GRS 8PF-8 8" Paper Cone Foam Surround Woofer
  • BrandGRS
  • Model8PF-8
  • Part Number292-408
  • UPC844632088476
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (29 Reviews)
  • Weight2.95 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.

View similar products to the GRS 8PF-8 8" Paper Cone Foam Surround Woofer
in the Woofers product category.


GRS 8PF-8 8" Paper Cone Foam Surround Woofer
GRS 8PF-8 8" Paper Cone Foam Surround Woofer is rated 4.5517 out of 5 by 29.
Rated 5 out of 5 by from Decent speakers. Best bang for the buck!I bought 2 of these GRS 8in. woofers along with 2 Goldwood GT-520 soft dome horn tweeters, put them in a pair of thrift-shop Nova-15 cabinets I picked up for 10 bucks, blew the dust off a couple of old RS two-way crossover boards, hooked everything up, (@ 2.5kHz - tried 4kHz didn't like the way they sounded) and called them my garage speakers. Considering the price, these speakers sound really good. No doubt the weak point in my project here is the cabinets. Look pretty good they do, resonate at high volume they also do. Meh, they're garage speakers, maybe someday I'll stop being so lazy and build some decent cabinets.
Date published: 2015-10-18
Rated 5 out of 5 by from all around great..cant beat it for the price. 1.95 cf sealed. poly fill. backed with goldwood 525 tweeter. dayton 3.5kh xover. (should of went lower, but pioneer elite adjusts it nicely). two 8pfs in parallel for 4ohm.. low end is awesome. this was just a little fun project.. couldn't be happier.. my next project ill swap out the xovers.. box is spray painted black.. it was just a test box.. and i absolutely will build duplicates.. but nicer...handles a good amount of power.. pioneer elite vsx 01txh. they never break up.. bass tracks test tones.. may build a slightly smaller ported enclosure just for fun..
Date published: 2015-08-13
Rated 5 out of 5 by from GRS 8PF-8I ordered 4 of these woofers to replace some 15 year old Yamaha speakers that were starting to tare around the suspension. these fit perfectly and sounded better than the old ones. sounds great without distorting and can shack the house with little effort.
Date published: 2015-07-16
Rated 5 out of 5 by from great sound for the costI bought this as a replacement woofer, I like it so well I am going to replace the other one as well
Date published: 2015-03-10
Rated 5 out of 5 by from Great value, great soundOrdered a pair of these to refurb a pair of Studio Master cabinets on the cheap for a pair of garage speakers. Got them put together tonight, and couldn't believe the sound and power handling capability vs. the price.
Date published: 2015-01-08
Rated 1 out of 5 by from cheapo wooferVery quiet. Can talk over it at its loudest volume. Breaks up and cuts out before getting 50 watts. Won't buy again
Date published: 2014-08-11
  • 2015-11-29T06:55CST
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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 tech@parts-expresss.com  for a prompt reply.
GRS 8PF-8 8" Paper Cone Foam Surround Woofer

Please indicate  the Mms and Cms.  Thanks.

Asked by: zaza
Mms for this driver is 25 grams, Cms is 0.391 mm/N.
Answered by: MattP
Date published: 2015-05-12

Need 4 ohm load in an OB project. Would 2 of these work paralleled to get my desired load? Tweeter offset between the two. Desired range is about 80Hz -- 5K. The 4ohm Goldwood doesn't seem to be reviewed with quite the enthusiasm.

Asked by: ibroke
These will work well OB down to 80 Hz, although 5k is a stretch for any 8" woofer. I would recommend using a tweeter that can cross lower (maybe 1,800-2kHz), or adding a midrange.
Answered by: MattP
Date published: 2015-02-18

are the grs-8PF-8 8 inch speakers good for a small pa speaker replacement

Asked by: corny
Probably not. PA and musical instrument speakers have a higher SPL rating than home audio speakers such as the GRS. This means that it will not play nearly as loud as the original speaker, possibly making the high frequency speaker sound over-bearing. Not what you want! Go with a pro-audio type woofer.
Answered by: Eric Chandler
Date published: 2014-06-03

How would this woofer perform as mid duty? I have a 12" goldwood woofer that I was planning on using for the lows and I have a few of these sitting around and was wondering if they would work.

Asked by: Jinonyx
Usually an 8" speaker will only play conservatively up to about 2,000 Hz before it starts to beam. If you pick a tweeter that will safely cross this low it should not be a problem.
Answered by: MattP
Date published: 2014-01-28

Would these work in an open baffle situation? The q values tell me it would, and Im not very concerned with the Xmax because they'll be used with a bandpass

Asked by: dkward00
Yes these will work for an open baffle application.
Answered by: MattP
Date published: 2014-01-17

Could these work in a 2-way system

I would like to build some budget speakers for my garage and I was wondering if these would work in a woofer/tweeter type system, if so, what would be the x-over point for the tweeter?
Asked by: safeTguy
These could work as a two way assuming your tweeter can cross over low enough. I cannot recommend a crossover point without knowing which tweeter you plan on using.
Answered by: MattP
Date published: 2013-10-29
  • 2015-11-29T07:52CST
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