Description
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
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.
Product Specifications
Nominal Diameter: 8"
Power Handling (RMS): 65 Watts
Power Handling (MAX): 90 Watts
Impedance: 8Ω
Frequency Response: 40 to 5,000Hz
Sensitivity: 85dB 2.83V/1m
Voice Coil Diameter: 1.5"
Thiele-Small Parameters
Resonant Frequency (Fs) 52Hz
DC Resistance (Re) 7.58Ω
Voice Coil Inductance (Le) 1.09mH
Mechanical Q (Qms) 4.77
Electromagnetic Q (Qes) 1.45
Total Q (Qts) 1.11
Compliance Equivalent Volume (Vas) 0.76ft³
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
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
Sealed Volume 0.81ft³
Sealed F3 54Hz
Vented Volume 5.54ft³
Vented F3 29Hz