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!
  • 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
Part # 
Weight: 2.95 lbs.  
List Price$13.99
You Save19%
Your Price
Buy 4-up$9.00
Part # 292-408
Qty:  EA
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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
  • * Enclosure volume/F3s based on BassBox "optimum" calculations-
Optimum Cabinet Size *
  • Sealed Volume1.3 ft.³
  • Sealed F354 Hz
  • Vented Volume4.91 ft.³
  • Vented F330 Hz
  • * Enclosure volume/F3s based on BassBox "optimum" calculations-
GRS 8PF-8 8" Paper Cone Foam Surround Woofer
  • BrandGRS
  • Model8PF-8
  • Part Number292-408
  • UPC844632088476
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (21 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.

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GRS 8PF-8 8" Paper Cone Foam Surround Woofer
GRS 8PF-8 8" Paper Cone Foam Surround Woofer is rated 4.619 out of 5 by 21.
Rated 5 out of 5 by from Excellent replacement speakers!GRS 8PF... excellent product, excellent price, excellent sound!! Re-fitted some MicroAcoustic speakers (Bose 301 copies) circa 1979, they sound awesome with good bass response and full midrange. Simple installation as well.
Date published: 2014-04-15
Rated 5 out of 5 by from One word awesomeSpeakers are great for the price worksmenship, quality, sound can't expect more U won't regret it thanks again parts ur the Best
Date published: 2013-10-08
Rated 5 out of 5 by from I have used these several times*****If you use these in virtually anything sealed, approx 1cu.ft+ per woofer you will be happy not just satisfied. I started using these about 2 years ago in a pair of AR m3 sealed 8". There was nothing wrong with ther factory AR poly 8" I just knew the speaker had more potential. This GRS "paper" 8 set it off,Great mid bass.Then built some 3 way towers with a single GRS 8 per cabinet sealed of course and they rocked from 750hz down. Just got some Dante cabs with bad drivers. 3/4 high density particle board with dual 8" cutouts 3 way. using 2 of these paper 8's celestion mid and vifa tweet and I know they will sound fabulous.I've tried the poly version and although it may "play" a little lower it is no trade off for the mid bass of these "paper" cones.I like them so much that I spent an hour in storage looking for the AR poly 8" so that I could reuse these myself when I recently sold the AR's.I have used the paper and poly 8's and 12's from GRS and the paper cone is the hands down winner.I like Parts express.
Date published: 2013-09-28
Rated 5 out of 5 by from EPI T/E Series 100 ReplacementUsed this woofer to replace old EPI Time Energy Series 100 woofers. Drop in replacement, holes lined up close enough. They sound GREAT!!! EPI uses only a high pass on the tweeter. The GRS woofer roles off at a higher Hz which actually sounds fine. Bass possibly minutely better on EPI driver. I chose the paper GRS over the poly as the PE optimum enclosure size was closer to the EPI cabinet.Check out the before and after pictures. The GRS even looks better. EPIs have their trademark square magnet. I also have a pair of the first original EPI model 202s that I reconed a while ago. I will also use these GRS paper woofers for those when the EPI woofers fail.PE order came on time and packaged well.
Date published: 2013-07-28
Rated 4 out of 5 by from Perfect MatchI rescued a pair of Bose 301 series I speakers from the trash heap. These woofers gave new life to an old classic. They are smooth with a nice bass response that's neither boomy or wimpy. My wife was surprised at the loudness and clarity of these drivers. All in all a bargain.
Date published: 2013-03-29
Rated 4 out of 5 by from Very good deal for the moneyI needed some inexpensive 8" speakers to bring back to life some vintage speakers I got at a thrift store. Well Parts Express was the place to look and I purchased a pair of the GRS 8 woofers. I was impressed at the build of the speakers when I took them out of the box. The only problem was they didn't quite fit the holes that were in the vintage cabinets. I compensated for this and installed them any way. Well for inexpensive speakers these sounded great for my project and would buy them again.
Date published: 2013-03-19

Product Q&A

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who own this product or have experience with it.
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GRS 8PF-8 8" Paper Cone Foam Surround Woofer

anyone know what best size (cu ft) the sealed or ported cabinet should be for this item?

anyone know what best size (cu ft) the sealed or ported cabinet should be? also smallest cabinet can bethanks
Asked by: neil
This speaker will provide the best performance in a sealed alignment, around 1.3ft³ is what I get for "optimum" internal volume. Less than 1ft³ will push the Qtc above 1, which is commonly considered to be a "boomy" enclosure.
Answered by: RussR
Date published: 2012-06-30

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

What is the diameter of the basket?

I am replacing an 8" woofer in a Boston Acoustics A60 speaker. The diameter of this woofer's frame is 9" and the cutout hole is 8". Will your woofer fit as a drop in replacement? Yours appears to be an inch too small.
Asked by: JoeA
Yes this would fall right through the hole. The Bostons are very difficult to replace do to odd frame sizes and shapes, you can either repair the woofers you have or enlarge the opening to ~9" to accommodate a 10" woofer.
Answered by: MattP
Date published: 2013-10-05

What size box?

Okay I have two of these and I am either going to build two boxes (one for each woofer) or one box and put them both in it. One staff member said optimal sealed size is 1.3 cubic feet and another said 0.5 cubic feet per woofer. If I build just one box for them both should it be 1 cubic feet or 2.6? Thanks.
Asked by: Mason888
A woofer with a Q as high as this likes one thing, large boxes. I would build the 2.6 for both and call it a day.
Answered by: MattP
Date published: 2013-04-05

How about 2 per 1.77 cu.ft. sealed enclosure?

My woofer airspace is 1.77 cu.ft. Sealed box not including the woofers themselves or "stuffing".I Was considering these or the Dayton classic 8" 295-310 for sealed double woofer duty? Thanks.
Asked by: Doofus
The GRS would be better suited for a sealed enclosure. You can expect in room response into the upper 30's/lower 40's relatively easily.
Answered by: MattP
Date published: 2013-08-13

Replacement for Advent Heritage

Hello,I am looking to replace the dual woofers in a pair of Advent Heritages, Can you please tell me if two of these would work in a 1.9 sealed cabinet. If so what should i expect for a low end responce?
Asked by: hifibob
These will work well in that airspace, they should play into the lower 40's to upper 30's depending on room placement.
Answered by: MattP
Date published: 2013-01-22

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