6-1/2" Poly Cone Rubber Surround Woofer

The 6PR-8 replacement woofer is a perfect fit for many classic speaker systems, and is just as easy to work with in your own new speaker building projects. Its performance is optimized for use in acoustic suspension designs, and its cost is optimized to be easy on your budget.

Product Details

Our 6PR-8 6-1/2" polypropylene cone woofers with butyl rubber surrounds are great replacement speakers, but also provide excellent performance in new projects.

Quick Facts

  • 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 Specifications

Nominal Diameter6-1/2"
Power Handling (RMS)60 Watts
Power Handling (max)85 Watts
Impedance8 ohms
Frequency Response60 to 8,000 Hz
Sensitivity85 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 MaterialPoly
Surround MaterialRubber
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter6.5"
Baffle Cutout Diameter5.625"
# Mounting Holes4

Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)

Sealed Volume0.29 ft.³
Sealed F378 Hz
Vented Volume1.48 ft.³
Vented F343 Hz