GRS 8SW-4 8" Poly Cone Subwoofer 4 Ohm
 
Now you can replace blown or damaged subwoofers with new drivers that equal or outperform the original! GRS 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
Product Details
Brand
GRS
Model
8SW-4
Part Number
292-480
UPC
848864020198
Unit of Measure
Each
Weight
3.8
Product Specifications
Nominal Diameter
8"
Bolt Circle Diameter
7.875
Power Handling (RMS)
80 Watts
Power Handling (MAX)
160 Watts
Impedance
4Ω
Frequency Response
40 to 800Hz
Sensitivity
89dB 2.83V/1m
Voice Coil Diameter
1.5"
Thiele-Small Parameters
Resonant Frequency (Fs)
48Hz
DC Resistance (Re)
3.8Ω
Voice Coil Inductance (Le)
0.8mH
Mechanical Q (Qms)
4.33
Electromagnetic Q (Qes)
1.13
Total Q (Qts)
0.89
Compliance Equivalent Volume (Vas)
0.78ft³
Mechanical Compliance of Suspension (Cms)
0.33mm/N
BL Product (BL)
5.8T·m
Diaphragm Mass Inc. Airload (Mms)
33.2g
Maximum Linear Excursion (Xmax)
6mm
Surface Area of Cone (Sd)
216.8cm²
Materials of Construction
Cone Material
Poly
Surround Material
Rubber
Voice Coil Wire Material
Copper
Basket / Frame Material
Steel
Magnet Material
Ferrite
Mounting Information
Overall Outside Diameter
8.25"
Baffle Cutout Diameter
7.25"
Depth
4"
# Mounting Holes
8