what is the outer diameter of the outer most edge of this woofer? please be exact. I'm designing a box.

I know some 6.5" speakers are not 6.5", but these are. Replaced the woofers in my Dayton B652's (which are 6.5" outside diameter) and they went right in.

Could I use this as a car subwoofer if I put it in a box?

This will give you better bass than most car 6.5's, but it's a replacement woofer for bpokshelf speakers mainly, but home stereo component 6.5's definitely perform better than car ones, some are even 4ohm.

For those who purchased the speaker as a replacement sub for the Klipsch Promedia, how is the fit and does the amp power the sub as well as the OEM?

They fit perfect except the grill covers do not "push" back into place. Also you have to change the leads on the wiring because the connectors on these speakers are smaller. Really easy to do and they sound great. And yes the amp powers the sub and the OEM.. Super cheap fix, highly recommend.

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GRS 6PR-8 6-1/2" Poly Cone Rubber Surround Woofer

GRS 6PR-8 6-1/2" Poly Cone Rubber Surround Woofer

Product ID: 392383183

Details

Audio output mode
Surround
Brand
GRS
Connectivity technology
3.5mm or RCA
Mounting type
Flush Mount
Speaker maximum output power
100 Watts

🔊6.5" polypropylene cone for balanced sound

⚙️Stamped steel frame for perfect alignment

🛡️Butyl rubber surround for durability & high excursion

Description

🎶 Elevate your bass game with precision-engineered power!

VERSATILE COMPATIBILITY - Seamlessly integrates with home entertainment and car audio systems via 3.5mm auxiliary or RCA inputs.
ROBUST STAMPED STEEL FRAME - Keeps all components perfectly aligned, guaranteeing consistent audio fidelity and reliability.
OPTIMIZED HIGH ENERGY MOTOR - Features a ceramic ferrite magnet and vented pole piece for enhanced magnetic flux and superior bass response.
PRECISION POLYPROPYLENE CONE - Engineered for the ideal balance of stiffness, mass, and self-damping to deliver crisp, distortion-free bass.
DURABLE BUTYL RUBBER SURROUND - Ensures extended excursion and long-lasting performance, so your sound stays powerful over time.

The GRS 6PR-8 is a 6.5-inch polypropylene cone woofer designed for professional-grade sound clarity and durability. Featuring a butyl rubber surround for high excursion, a stamped steel frame for structural integrity, and an optimized motor with a ceramic ferrite magnet, it delivers powerful, distortion-free bass. Ideal for home and vehicle audio setups, it supports wired connectivity via 3.5mm aux or RCA, making it a versatile upgrade for audiophiles seeking premium surround sound performance.

Specifications

ASIN	B0045506LE
Age Range Description	Adult
Antenna Location	For Surround Sound Systems
Audio Driver Size	6.5 Inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Surround
Audio output mode	Surround
Brand	GRS
Built-In Media	1 x Speaker
Color	Black
Compatible Devices	Smartphone, Tablet, MP3 Player, Desktop, Laptop
Compatible with Vehicle Type	Car
Connectivity Protocol	aux
Connectivity Technology	3.5mm auxiliary or RCA
Connectivity technology	3.5mm auxiliary or RCA
Control Method	Touch
Controller Type	Remote Control
Customer Package Type	Individual Packaging
Enclosure Material	Polypropylene
Impedance	8 Ohms
Input Voltage	230 Volts
Input voltage	230 Volts
Is Waterproof	FALSE
Item Weight	1.29 kg
MP3 player	No
Manufacturer	GRS
Model Name	6PR-8
Model Number	6PR 8
Mounting Type	Flush Mount
Mounting type	Flush Mount
Number Of Circuits	1
Number of Audio Channels	2.0
Number of Items	1
Power Source	Corded Electric
Series Number	8
Speaker Maximum Output Power	100 Watts
Speaker Size	6.5 Inches
Speaker Type	Surround Sound
Speaker maximum output power	100 Watts
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	6 Inches
Tweeter Diameter	6.5 Inches
UPC	844632088513
Warranty Type	Limited
Water Resistance Level	Not Water Resistant
Wireless Technology	No Wireless Communication Technology
Woofer Diameter	6.5 Inches

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