Center Channel

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


Superior Performance in a Center Channel Speaker.

Available Finishes:

Center Speakers That Give Everyone A Front Row Seat

To get exceptional home theater performance from your multi-channel speaker setup, you need a Center Channel Speaker with the same sonic characteristics as the rest of your speakers.

The dual Dynamic Balance drivers and Dynamic Balance Tri-Laminate Tweeter used in the CS400i not only deliver wide response, low distortion and detailed highs, but they are the same components used throughout the RTi Series for seamless front stage imaging. Patented Power Port technology builds in explosive bass response with low distortion, making this a center channel speaker to be reckoned with. For a truly high-end, larger room home theater the CS400i is the perfect choice.

The CS400i features:

  • Magnetic shielding for safe placement on or near your TV without fear of picture interference
  • Exceptional bass response from a rear-firing Power Port venting system built into the speaker's back plate
  • Dynamic Balance drivers for wide response and low distortion
  • Dynamic Balance Tri-Laminate tweeter technology, with vapor deposited micro-layers of stainless steel and aluminum for detailed highs
  • Fluid cooled tweeter provides the high power handling essential for center channel speakers
  • Anti-diffraction bezel and grille system minimizes grille-edge reflections for more open, spacious, lifelike imaging
  • Smooth, natural midrange reproduction thanks to patented Acoustic Resonance Control technology
  • Low profile design for unobtrusive placement on top of your TV
  • Cascade Tapered Driver Array maintains wide horizontal dispersion so that every listener in the room hears clear, detailed sound
  • Timbre matched to other Polk speakers for seamless imaging
  • Available in Black finish to match most TV cabinets
  • Gold-plated 5-way binding post inputs for the most secure wire connections

A great Center Channel Speaker is a critical component of any home theater system. It could be the hardest working speaker in any system because it delivers over 50% of a film's soundtrack information: dialog, effects, music... Everything is anchored to the screen image by your center channel's performance. That's why you need a serious Center Channel Speaker for your serious home theater.

Driver Complement

Diameter1" (2.54cm) 
TypeDynamic Balance® Tri-laminate dome, shielded 
Mid / Woofer
Diameter6 1/2" (16.51cm) 
TypeDynamic Balance® drivers, shielded 


Total Frequency Response40Hz - 26kHz 
Upper -3dB Limit25 kHz
Lower -3dB Limit50 Hz
Nominal Impedance8 ohms
Efficiency91 dB
Recommended Amplifier Power10 - 250 watts per channel
InputsGold-plated 5-way binding posts, biamp/biwire 


Cabinet Dimensions
Height8 5/8" (21.91cm) 
Width18 3/4" (47.62cm) 
Depth14" (35.56cm) 


Unit of Measureeach 
Total Shipping Weight30.00 pounds


Speaker WarrantyLimited, 5 years parts and labor 

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.

CS400i Media

CS400i 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.

CS400i Accessories