12" Poly Cone Rubber Surround Woofer

The 12PR-8 replacement woofer is a great fit for many vintage 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 12PR-8 12" 8 ohm polypropylene cone woofer is a good, economical way to repair older speaker systems or create 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 Diameter12"
Power Handling (RMS)100 Watts
Power Handling (max)140 Watts
Impedance8 ohms
Frequency Response30 to 3,000 Hz
Sensitivity84 dB 1W/1m
Voice Coil Diameter2"

Thiele-Small Parameters

Resonant Frequency (Fs)32 Hz
DC Resistance (Re)7.59 ohms
Voice Coil Inductance (Le)1.4 mH
Mechanical Q (Qms)4.13
Electromagnetic Q (Qes)1.82
Total Q (Qts)1.26
Compliance Equivalent Volume (Vas)3.36 ft.³
Maximum Linear Excursion (Xmax)3.5 mm

Materials of Construction

Cone MaterialPoly
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter12"
Baffle Cutout Diameter11.0625"
# Mounting Holes8

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

Sealed Volume2.72 ft.³
Sealed F334 Hz
Vented Volume31 ft.³
Vented F318 Hz