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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
    (53 Reviews)
  • Weight3 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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Reviews

GRS 8PR-8 8" Poly Cone Rubber Surround Woofer
GRS 8PR-8 8" Poly Cone Rubber Surround Woofer is rated 4.6604 out of 5 by 53.
Rated 5 out of 5 by from Excellent performance, for the price.I have a pair of B652's, but wanted some more bass. After a little reseach on the PE website, I decided a pair of two way tower speakers with a 8" woofer might do the trick. Looking at price & reviews, I settled on the 8PR-8 for the woofer, and the Goldwood GT-25 for the tweeter. Throw in a PE 260-174 3000 Hz crossover, and a 36"X10"X10" cabinet, and I have what I wanted. I know it's apples & oranges, but these speakers perform way better than the B652's. They aren't audiophile material, but the sound is just what I like, without breaking the bank.
Date published: 2014-07-20
Rated 5 out of 5 by from Good Price - GoodSoundMy old Radio Shack woofers dried out and this was an easy and quick fix. Cost effective too.
Date published: 2014-06-18
Rated 5 out of 5 by from great for pricegreat sound for price bought 4 of these to repair blown woofers
Date published: 2014-04-01
Rated 5 out of 5 by from Excellent value!I purchased 4 8" woofers for 2 sets of speakers. Work perfect and super nice sound quality. An excellent upgrade for older speakers.
Date published: 2014-02-26
Rated 5 out of 5 by from huge bang for the the buck !!!I bought these woofers to replace blown up woofers from rotten surrounds in Tannoy PBM-8. They were a perfect replacement and they seem to be great quality. They sound just like the original woofers. Parts express is my new go to for this kind of product.
Date published: 2014-02-08
Rated 4 out of 5 by from Took a chance because a the price. Glad I did.This was a replacement for deteriorated 8" Advent speakers. They sound great in the cabinets with the original crossovers. I got them for their price and really didn't expect much from them but they do sound better than the originals. I should tell you that my speakers were sealed with adhesive and were a bit of a pain to remove. I used the 260-400 speaker sealing caulk to close them up. I'm gonna use them to make a small sealed box for my old Tercel and maybe use some GRS 4FR8s in it too. Gotta love cheap great sounding speakers!
Date published: 2014-01-30

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

Would this woofer be a good replacement for a pioneer model CS 44 ?

Asked by: gmne
This might be a good option. The main thing to check would be the actual driver dimensions. There is some variation on speaker frames so the outside diameter and cutout is important
Answered by: Chrisf
Date published: 2014-06-06

Port size for 12x16x12 box tuned for 50hz

I will be making some 2-way home theator speakers, I would like to tune the 12x16x12 boxes for around 50Hz. Also, Would a pvc pipe work for a port? I have used them in the past with DIY speakers, and have had no trouble, thanks!
Asked by: Speakerfreaker
A 2" diameter, 2" long port is required to tune those enclosures to 50 Hz. Yes PVC pipe will work perfectly as port tubes.
Answered by: MattP
Date published: 2013-10-02

Will these work well as replacements for dual 8's in a 1.5 cu.ft box?

I have a vintage Jennings Research cabinet that uses 2-8"ers in a sealed box. Crossed over at 2500hz and 500hz respectively.I see from the specs that PE recommends smaller box and since there's 2 drivers can essentially double the box size? Which would be about 1.6 cuft. But, Qts looks like they should want bigger box?
Asked by: cmfast
These will work fine for that application. The box size we have listed is a high Q alignment because the optimally flat volume is quite large.
Answered by: MattP
Date published: 2013-06-27

Would this be a good replacement woofer for the Boston Acoustics A-60 speakers? I have a pair with tweeters but no woofers.

Asked by: Joe9898
I'd first like to know if the A-60's have crossovers. Also, what are the specs of the tweeters you have?
Answered by: markjulie2000
Date published: 2013-04-04

passive radiator?

I put this in a .88 cubic ft sealed box and it sounds great, but the bass isn't deep enough for me. Could adding a passive radiator help. I don't know much about them. Or is the box to small for this woofer.
Asked by: derek82
I would personally not recommend using a PR with this woofer. It does not model well and you will have much smoother response leaving it in a sealed enclosure.
Answered by: MattP
Date published: 2013-02-13

Exact OSD.

I need an exact outside diameter measurement on at least the first 4 speakers on the 8 inch page. Or at least these. Every one is stated as 8" exactly, and I know that this can't be true. Every speaker's OSD is different. I need to know because I need to find a cheap replacement for my old realistic's that drop right in to a 8 & 1/2 inch cutout that's routered and recessed flush with the front baffle. I don't have a router, so they have to fit exact.Thanks.
Asked by: Jlux
The standard cutout is 7-3/4", the recessed routed flange is most likely 1//2" - 3/4" wide to allow flush mounting. Any of these speakers will fit without modification.
Answered by: Nitnub
Date published: 2013-02-04

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