GRS 8PR-8 8" 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: 3 lbs. 

Product Specifications
Nominal Diameter 8"
Power Handling (RMS) 65 Watts

Power Handling (max) 90 Watts
Impedance 8 ohms

Frequency Response 40 to 5,000 Hz
Sensitivity 85 dB 1W/1m

Voice Coil Diameter 1.5"


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 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



Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
Sealed Volume 0.81 ft.³
Sealed F354 Hz

Vented Volume 5.54 ft.³
Vented F329 Hz