5 out of 5
GRS 12PR-8 12" Poly Cone Rubber Surround Woofer
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Pricing Note
Product Description
Manufacturer Part Number: 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.
Key Features:
Overview:
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.
Specification:
Manuals & Resources:
A GRS 12PR-8 12" 8 ohm polypropylene cone woofer is a good, economical way to repair older speaker systems or create new projects.
Key Features:
- 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
Overview:
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.
Specification:
Product Details | |
|---|---|
| Brand | GRS |
| Model | 12PR-8 |
| Part Number | 292-422 |
| UPC | 844632088544 |
| Unit of Measure | Each |
| Weight | 5.55 |
Product Specifications | |
|---|---|
| Nominal Diameter | 12" |
| Power Handling (RMS) | 100 Watts |
| Power Handling (MAX) | 200 Watts |
| Impedance | 8Ω |
| Frequency Response | 30 to 3,000Hz |
| Sensitivity | 85dB 2.83V/1m |
| Voice Coil Diameter | 2" |
Thiele-Small Parameters | |
|---|---|
| Resonant Frequency (Fs) | 30Hz |
| DC Resistance (Re) | 7.2Ω |
| Voice Coil Inductance (Le) | 1.4mH |
| Mechanical Q (Qms) | 3.18 |
| Electromagnetic Q (Qes) | 1.58 |
| Total Q (Qts) | 1.06 |
| Compliance Equivalent Volume (Vas) | 3.98ft³ |
| Mechanical Compliance of Suspension (Cms) | 0.29mm/N |
| BL Product (BL) | 9.2T·m |
| Diaphragm Mass Inc. Airload (Mms) | 100g |
| Maximum Linear Excursion (Xmax) | 3.5mm |
Materials of Construction | |
|---|---|
| Cone Material | Poly |
| Magnet Material | Ferrite |
Mounting Information | |
|---|---|
| Overall Outside Diameter | 12" |
| Baffle Cutout Diameter | 11.0625" |
| Depth | 4.6875" |
| # Mounting Holes | 8 |
Parts Express Staff Recommended Enclosure Volume | |
|---|---|
| Sealed Volume | 2ft³ |
| Sealed F3 | 36.4Hz |
Manuals & Resources:
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
By Brian Tucker
Date: June 08, 2022
I had mice chew the actual cones from my Vega 12s. These were 4 ohm woofers and I plan to recone them. I finally got tired of having the speakers down and ran across these. They are 8 ohm and are subwoofers but I thought why not it will at least provide the cabinets with some lower end. They worked excellent for this application. Screw holes lined up and they are lacking in the mid bass which I expected but they provided a nice fill in the larger ported Vega cabinets.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Henry O.
Date: March 26, 2022
Replacement for old 3 way floor standing Radio Shack full range speaker systems. A very good choice.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Dustin Cavins
Date: February 28, 2022
Stopped working within an hour. I've abused other subs harder and for several years that are still working. Not this one.. I'll buy something better next time.
Rating: 
[1 of 5 Stars!]
[1 of 5 Stars!]
By The Bear
Date: February 17, 2022
Put these woofers in Marantz speakers to replace old ones and they sound every bit as good as the original. Would definitely recommend.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Ryan H.
Date: February 01, 2022
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By T Borkowski
Date: October 27, 2021
I love these woofers!Summary:- Used in Pioneer CS-G303 cabinet (replaced original woofer, but still using original midrange and tweeter) - see photo- A Sony STRDH130 2 Channel Stereo Receiver is being used to drive themI bought these woofers to replace my aging and deteriorating Pioneer ones, which were approaching 30 years old. Not a bad run, but they were showing their age. These GRS (Parts Express) woofers didn't exactly fit in the Pioneer cabinets due to the inner bevel - the cut-out needed to be enlarged about 1/16th of an inch. Once that was set, they fit perfectly.These speakers are used in my garage, so they're purely for casual listening. With that said, I was kind of shocked at just how good they sounded. They have a tighter feel along with a slight bump in the low end compared to the old ones. Using a sample tone album I found on Spotify (search for the album Audio Test Tones) I was able to get a great response down to 40Hz, but once I got below that it drops off quickly. 30Hz barely registered. Your mileage may vary depending on the enclosure you install these in and the amp you use. I use these speakers only for music, so this is more than good enough. I've listened to these for about 10 hours and they had no issue playing loud for long periods (3 or 4 straight hours).Spending a little money on these woofers I'm hopeful I've extended the lifespan of these old Pioneer speakers for many more years to come. Highly recommended!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]