This product is a vintage Polk model and is not available for sale, but it may still be available in some stores as a closeout or used product. The following text is taken from the original sales brochure for this product and does not reflect current availability. If you happen to have any question or concerns about this product, or any other Polk Audio product, feel free to contact our Customer Service Department at 1-800-377-7655 Monday - Friday, 9am - 5:30pm EST


Bookshelf speakers combining performance and value.

Available Finishes:

Soundly based on dynamic balance.

Consisting of one floor-standing and three bookshelf models, the S series offers upcompromised performance with unmatched value. The way tweeters and drivers are matched, the way the crossovers are designed, the way the cabinet mechanics are "voiced" to the components, the way the custom-made screws hold it in place, serve to make the S series a great choice for any indoor home loudspeaker application.

The S4 employs the new SL5000 Dynamic Balance 1" drive unit in a vented cabinet. The smallest bookshelf model in the S series, the S4 offers big performance. Julian Hirsch, writing for Stereo Review, said: "The S4's measured performance was exceptional, especially for its size and price. In particular, its frequency response over most of the audio range was among the flattest we have ever measured from a speaker."

Driver Complement

Diameter1" (2.54cm) 
Typedome tweeter 
Diameter6 1/2" (16.51cm) 


Total Frequency Response32Hz - 25kHz 
Upper -3dB Limit23 kHz
Lower -3dB Limit50 Hz
Nominal Impedance8 ohms
Efficiency91 dB
Recommended Amplifier Power20 - 100 watts per channel

Amplifier Specs

Amplifier Type


Cabinet Dimensions
Height15 1/2" (39.37cm) 
Width9 1/2" (24.13cm) 
Depth7 1/4" (18.41cm) 

Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655 (USA and Canada). Outside of North America call +1 (410) 358-3600.

S4 Media

S4 Literature

Want to know more? Want to dig just a little deeper to learn about this product? Here's a list of source material that will give more detail, other perspectives, and answer questions you may have.

S4 Accessories