This woofer is a great replacement for many Polk Audio models.

Here is the list of woofer models and what cabinet models they go into:
4 ohm woofer models are:
- MW8000 : Goes into S8, S10 and many more.
- MW8002 : Goes into RT7, RT10, RT400 and many more.
- MW8003 : Goes into RT20, RT20P and many more.
- MW8004 : Goes into PSW50 and many more.

PLEASE READ:  The unique size 8″ Polk woofers have been discontinued, so we had these custom made for us designed from the Polk Audio woofers.  These are new current production stock.  The parameters were closely copied to ensure similar output level and sound. In comparison to the original, it is very close. Overall, it is a great reproduction for many of the Polk Audio 8″ woofers. It is a perfect drop in fit with no modification needed to the cabinet. The screw holes match up perfect. This unique aftermarket woofer has a steel basket, polypropylene injected cone, butyl rubber surround and a standard ferrite non-shielded magnet and a new foam gasket for a proper seal to the cabinet.  Our woofer does not have a shielded magnet. Some Polk models like the MW8002, MW8003 and MW8103 have a shielded magnet, but a shielded magnet only matters if it is near an old tube style TV or monitor.  Also, some Polk woofers like the MW8003 and MW8004 came out of subwoofers and these woofers have large 4.25″ poly dust caps. Please note our replacement woofers have the standard 1.5″ dust cap.

Specifications and Small Signal Parameters:
Voice Coil Impedance: 4 ohm
Voice Coil Diameter: 1" (25.5mm) Aluminum Former
Rated Frequency Response: 39 - 6k Hz
Sensitivity: 89.8 dB SPL
Rated Power: 50 watts
Magnet Weight: 450 g (15.9 oz)
Net Weight: 1140 g (40.2 oz)
Fs: 39.8 Hz
Re: 3.4 ohm
Qts: 0.41
Qms: 3.53
Qes: .46
Vas: 45.4 liters
Xmax: 3.75 mm
No: 0.6 % 

Speaker Dimensions:
Outside Diameter: 7.72" (196mm)
Cutout Diameter: 6.625" (168mm)
Internal Depth: 2.91" (74mm)

All packages are insured with tracking.