5 out of 5
GRS 8PR-8 8" Poly Cone Rubber Surround Woofer
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Product Description
Manufacturer Part Number: 8PR-8
The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications.
Key Features:
Overview:
GRS 8PR-8 8" Poly Cone Rubber Surround Woofer
The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround to produce smooth response with outstanding damping. Thanks to its carefully optimized parameters, this driver is ideal for use in sealed-box speaker applications giving it a high degree of compatibility when used as a replacement speaker-it provides excellent performance in new designs, as well.
Specification:
Manuals & Resources:
The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications.
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 8PR-8 8" Poly Cone Rubber Surround Woofer
The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround to produce smooth response with outstanding damping. Thanks to its carefully optimized parameters, this driver is ideal for use in sealed-box speaker applications giving it a high degree of compatibility when used as a replacement speaker-it provides excellent performance in new designs, as well.
Specification:
Product Details | |
|---|---|
| Brand | GRS |
| Model | 8PR-8 |
| Part Number | 292-428 |
| UPC | 844632088520 |
| Unit of Measure | Each |
| Weight | 3 |
Product Specifications | |
|---|---|
| Nominal Diameter | 8" |
| Power Handling (RMS) | 65 Watts |
| Power Handling (MAX) | 130 Watts |
| Impedance | 8Ω |
| Frequency Response | 40 to 5,000Hz |
| Sensitivity | 87dB 2.83V/1m |
| Voice Coil Diameter | 1.5" |
Thiele-Small Parameters | |
|---|---|
| Resonant Frequency (Fs) | 52Hz |
| DC Resistance (Re) | 7.4Ω |
| Voice Coil Inductance (Le) | 1.1mH |
| Mechanical Q (Qms) | 4.08 |
| Electromagnetic Q (Qes) | 1.28 |
| Total Q (Qts) | 0.97 |
| Compliance Equivalent Volume (Vas) | 0.79ft³ |
| Mechanical Compliance of Suspension (Cms) | 0.36mm/N |
| BL Product (BL) | 6.9T·m |
| Diaphragm Mass Inc. Airload (Mms) | 23.42g |
| Maximum Linear Excursion (Xmax) | 3mm |
Materials of Construction | |
|---|---|
| Cone Material | Poly |
| Surround Material | Rubber |
| Magnet Material | Ferrite |
Mounting Information | |
|---|---|
| Overall Outside Diameter | 8" |
| Baffle Cutout Diameter | 7.32" |
| Depth | 3.44" |
| # Mounting Holes | 4 |
Parts Express Staff Recommended Enclosure Volume | |
|---|---|
| Sealed Volume | 0.85ft³ |
| Sealed F3 | 52.2Hz |
| Vented Volume | 0.85ft³ |
| Vented F3 | 43.3Hz |
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 Conrad D. Shull
Date: October 28, 2024
I bought two to use as "testers" in a pair of folded Voigt boxes I recently built. I'm amazed at how good these 3" speakers sound in this application. I'll be getting some more expensive drivers to replace them at some time (that's always been the plan), but I am very satisfied for now with how well these inexpensive little guys sound. When I do replace them with higher end drivers, I'll likely pick up six more and build an array system speaker set. At $10 a pop, they are an experimenter's dream.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Camelia Rios
Date: May 24, 2024
Did not work for only a month or two
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Nate Taylor
Date: April 09, 2024
A little muddy, but I'm satisfied overall
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By pgdion
Date: March 31, 2024
I had a woofer go bad in a small speaker, these fit perfectly. Larger magnetic and appear to be better quality. This one is a little bass-ier, probably because there is no whizzer cone. Sound quality is very good though and do is the volume ( good efficiency for a small speaker). Bought last summer and still working great. I am very happy, will probably buy another and just swap out the one in the other speaker too.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Elmer Meece
Date: February 22, 2024
I purchased this for a simple project. Has nice crisp sound.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Jose M Ocasio
Date: January 28, 2024
Perfect
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]