8SW-4Subwoofer Drivers

8" Poly Cone Subwoofer 4 Ohm

Our 8SW-4 poly cone replacement subwoofer represents an excellent value. Versatile and powerful enough to be used in compact home theater systems, multimedia or computer speaker setups, even car audio applications, you'll find the 8SW-4 easy to implement in new projects, and in many cases, an upgrade when used to replace blown or damaged subs.

Product Details

Now you can replace blown or damaged subwoofers with new drivers that equal or outperform the original! Our poly cone subwoofers are the perfect replacement for tired, worn-out subwoofers in a variety of audio gear and even work great for new designs. Their handsome polypropylene cones provide durability and good looks, while the large vented magnet assemblies and extended voice coils enable long-throw performance and authoritative bass in a variety of enclosures.


The 8" model features a 1-1/2" diameter voice coil with extended 6mm excursion for solid bass performance in compact sealed and vented enclosures. These versatile subs are also rugged enough to be used in dipole and automotive infinite baffle applications.


See the below list of recommended enclosure alignments for new designs.


Recommended sealed enclosure: 1.0 ft^3, F3 = 48 Hz, Qtc: 1.16


Recommended vented enclosure: 1.0 ft^3, Fb = 40 Hz, F3 = 34 Hz


Quick Facts

  • Polypropylene cone for perfect balance of stiffness, mass, and self-damping
  • Butyl rubber surround ensures high excursion and long-term durability
  • Large 1-1/2" voice coil and bumped back plate enable high power handling
  • Long-throw design for deep, powerful bass


Product Specifications

Nominal Diameter8"
Power Handling (RMS)80 Watts
Power Handling (max)160 Watts
Impedance4 ohms
Frequency Response40 to 800 Hz
Sensitivity88 dB 2.83V/1m
Voice Coil Diameter1.5"

Thiele-Small Parameters

Resonant Frequency (Fs)49 Hz
DC Resistance (Re)3.86 ohms
Voice Coil Inductance (Le)0.84 mH
Mechanical Q (Qms)4.22
Electromagnetic Q (Qes)1.19
Total Q (Qts)0.88
Compliance Equivalent Volume (Vas)0.93 ft.³
Maximum Linear Excursion (Xmax)6 mm

Materials of Construction

Cone MaterialPoly
Surround MaterialRubber
Voice Coil Wire MaterialCopper
Basket / Frame MaterialSteel
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter8.25"
Baffle Cutout Diameter7.25"
Bolt Circle Diameter7.875"
# Mounting Holes8