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

• 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

Weight: 2.85 lbs.

Product Specifications
Nominal Diameter 6-1/2"
Power Handling (RMS) 60 Watts

Power Handling (max) 85 Watts
Impedance 8 ohms

Frequency Response 60 to 8,000 Hz
Sensitivity 85 dB 1W/1m

Voice Coil Diameter1.5"

Thiele-Small Parameters
Resonant Frequency (Fs) 75 Hz
DC Resistance (Re) 7.55 ohms

Voice Coil Inductance (Le) 1.11 mH
Mechanical Q (Qms) 4.32

Electromagnetic Q (Qes) 1.34
Total Q (Qts) 1.02

Compliance Equivalent Volume (Vas) 0.24 ft.³
Maximum Linear Excursion (Xmax) 3 mm



Materials of Construction
Cone Material Poly
Surround Material Rubber

Magnet Material Ferrite


Mounting Information
Overall Outside Diameter 6.5"
Baffle Cutout Diameter 5.625"

Depth 3.0625"
# Mounting Holes 4

Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
Sealed Volume 0.29 ft.³
Sealed F378 Hz

Vented Volume 1.48 ft.³
Vented F343 Hz