Polk Audio CSi A6 Center Channel Speaker

Driver Technology

Dynamic Balance:

  • Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance.
  • Eliminating resonance in speakers results in a wide, smooth response and low distortion.

Polymer Composite Woofers:

  • The speaker features two 6-1/2" polymer composite woofers for smooth wide-range response with low distortion.
  • For high performance durability, each woofer uses a butyl rubber surround and an acoustically inert stamped driver basket.

Silk/Polymer Tweeter: 

  • The speaker has a 1" silk/polymer dome tweeter that provides clear, detailed highs.
  • The tweeter uses a heat sink on the Neodymium magnet for superior heat dissipation, power handling and reliability.

Mylar Bypass Capacitors: 

  • Mylar bypass capacitors in the speaker's crossover network extend high frequency response and improve detail and transparency.

Frequency Response Note:

  • The overall frequency response is 45Hz-27kHz and the -3dB frequency response is 55-26kHz.

Enclosure Design

Acoustically Inert Cabinet: 

  • The speaker cabinet features all-MDF construction with extensive internal bracings that virtually eliminate sound-muddying resonance.

Acoustic Resonance Control (ARC):

  • Internal cabinet resonance can impart a "thick" character to voices.
  • Polk's patented Acoustic Resonance Control port system overcomes this problem.
  • In addition to the Power Port venting system, the speaker has a front-firing port that is tuned to suppress the internal cabinet resonance, resulting in smooth, natural midrange reproduction.

Power Port Venting System: 

  • The speaker has two rear-firing Power Port vents built into its two-piece back plate for precise deep bass response.
  • This venting system allows air velocity to slow gradually, vastly reducing air turbulence, and delivering greater bass efficiency than conventional ports.
  • The center channel speaker also features a front firing port for added efficiency and bass response.

Anti-Diffraction Grille: 

  • The floating anti-diffraction grille minimizes grille diffraction for spacious, 3-dimensional imaging.


Dual 5-Way Binding Posts: 

  • The speaker has two sets of gold-plated 5-way binding posts connected by gold-plated jumpers.
  • Using the dual 5-way binding posts, you can bi-amp or bi-wire the speaker.
  • The gold-plated 5-way binding posts will accept bare wire, pin connectors, spade connectors, banana plugs, and dual banana plugs.

Mounting Options

Reversible Design:

  • If the speaker must be positioned below ear level, you can turn the cabinet upside down, allowing the drivers to fire upward.

Adjustable Kickstand:

  • The speaker features a unique Adjustable Kickstand for secure balance on shallow-depth TVs and monitors.

Magnetically Shielded: 

  • The speaker is magnetically shielded, allowing you to place it on your television without distorting the picture.
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