GRS 8PR-8 8" Paper Cone Foam Surround Woofer

The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications.

Resonant frequency fS 52 Hz

Electrical Q QES 1.45

Mechanical Q QMS 4.77

Total Q factor QTS 1.11

Suspension equivalent air volume VAS 21.5 litres

DC resistance RE 7.58 Ω

Voice coil inductance LE 1.09 mH

Maximum linear excursion Xmax ± 3 mm

Efficiency η₀ 0.2 %

Efficiency bandwidth product EBP 35

Overall diameter 203.2 mm

Baffle hole diameter 185.9 mm

Mounting depth 87.4 mm

Diaphragm material Polypropylene

Surround material Rubber

Voice coil diameter 38.1 mm

Magnet Ferrite

Highlights

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
 

Product Details

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.

Specifications for: 8PR-8 8" Poly Cone Rubber Surround Woofer

• Woofer SeriesReplacement woofer
• Woofer TypeMidwoofer
• Nominal Diameter
• Power Handling (RMS)65 Watts
• Power Handling (max)90 Watts
• Continuous Program Power
• Impedance8 ohms
• Sensitivity85 dB 1W/1m
• Frequency Response40 to 5,000 Hz
• Voice Coil Diameter1.5"
• Magnet Weight
• DC Resistance (Re)7.58 ohms
• Voice Coil Inductance (Le)1.09 mH
• Resonant Frequency (Fs)52 Hz
• Mechanical Q (Qms)4.77
• Electromagnetic Q (Qes)1.45
• Total Q (Qts)1.11
• Diaphragm Mass Inc. Airload (Mms)
• Moving Mass Of Diaphragm (Mmd)
• Mechanical Compliance of Suspension (Cms)
• Surface Area of Cone (Sd)
• Volume of Displacement (Vd)
• BL Product (BL)
• Compliance Equivalent Volume (Vas)0.76 ft.³
• Maximum Linear Excursion (Xmax)3 mm
• Driver's Mechanical Losses (Rms)
• Cone / Diaphragm MaterialPoly
• Surround MaterialRubber
• Voice Coil Wire Material
• Voice Coil Former
• Dual Voice Coil
• Basket / Frame Material
• Magnet MaterialFerrite
• Shielded
• Overall Outside Diameter8"
• Overall Depth3.44"
• Baffle Cutout Diameter7.32"
• Bolt Circle Diameter
• # Mounting Holes4
• Mounting Hole Diameter
• Sealed Volume0.81 ft.³
• Sealed F354 Hz
• Vented Volume5.54 ft.³
• Vented F329 Hz