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


Center Channel Loudspeaker

Available Finishes:
Additional Images

Center Speakers That Give Everyone A Front Row Seat

Your Center Channel Speaker is more than just a dialogue speaker: it must carry over 50% of the information in multi-channel movie and music formats. The CSi30 is engineered to be an affordable high performance Center Channel Speaker, anchoring the action or instruments to your screen with performance that matches that of RTi Series main/front speakers.

The CSi30 features:

  • Poly-composite Dynamic Balance drivers with butyl rubber surrounds for durability and smooth wide range response.
  • 1" silk/polymer composite dome tweeter for clear, detailed highs.
  • The same components as the rest of the Polk Audio RTi Series; they're timbre-matched for a more realistic, more seamless surround environment.
  • Real wood veneer finished enclosure
  • Magnetic shielding for safe placement directly on or near video sources.
    Five-way binding post inputs for the most secure connections and the most versatile wiring applications.

Driver Complement

Diameter1" (2.54cm) 
TypeDynamic Balance silk/polymer composite dome, shielded 
Mid / Woofer
Diameter5 1/4" (13.34cm) 
TypeDynamic Balance® drivers, shielded 


Total Frequency Response52Hz-27kHz 
Upper -3dB Limit26 kHz
Lower -3dB Limit55 Hz
Nominal Impedance8 ohms
Efficiency90 dB
Recommended Amplifier Power10-180 watts per channel
Inputs5-way binding posts 

Amplifier Specs

Amplifier Type


Cabinet Dimensions
Height6 1/2" (16.51cm) 
Width20" (50.80cm) 
Depth6 3/8" (16.19cm) 
Product Weight (each)17.00 pounds


Unit of Measureeach 
Total Shipping Weight19.00 pounds


Speaker Warranty5 years parts and labor, limited 

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.

CSi30 Media

CSi30 Literature

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CSi30 Accessories