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Polk Audio CSi A6

Center channel speaker (Cherry)

53 Reviews | 3 questions - 7 answers

Item # 107CSIA6C

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Our take on the Polk Audio CSi A6

Enjoy detailed sound from this solidly built center channel

The Polk CSi A6 anchors clear, crisp movie dialogue to your TV screen and delivers thrilling special effects, thanks to its advanced driver technology and solid construction. Polk carefully designed the woofers and tweeter using laser testing to help identify and eliminate resonance points. The acoustically inert MDF cabinet fights internal vibrations that can compromise performance. It all adds up to smooth, accurate sound with DVDs and multichannel music sources. And a real wood veneer finish gives the speaker a warm, refined look, making it an attractive addition to just about any room.

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This center is a match for my "vintage" Polk main speakers and I've been wanting to add it to my home theater for a while. Having just gone on sale I had to pull the trigger and I can't be happier. It has the wide open "natural" polk sound, and the tone matches my other speakers perfectly.

Craig, Seattle, WA

What's in the Box:

  • Cherry center channel speaker
  • One 9.5" kickstand
  • One 5.5" kickstand (installed)
  • 4 Self-adhesive rubber feet
  • Owner's Manual
  • Online registration sheet
  • Polk Audio product brochure

Product Highlights:

  • video-shielded
  • bass-reflex (ported) design
  • frequency response 55-26,000 Hz (-3dB)
  • handles 20-200 watts
  • 1" Dynamic Balance® silk/polymer tweeter
  • dual 6-1/2" Dynamic Balance polymer composite woofers
  • PowerPort® technology improves bass response without introducing distortion
  • 8-ohm impedance
  • sensitivity 90 dB
  • 5-way binding post terminals
  • real wood veneer finish
  • 24-1/16"W x 7-13/16"H x 14-1/4"D
  • warranty: 5 years
  • Our 60-day money-back guarantee

Polk Audio CSi A6 Reviews

Average Customer Review(s):

(53 Reviews)
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Hands-on research

Features and Specs

Enclosure Bass Reflex
Tweeter Dome
Midrange size (inches) ---
Woofer size (inches) 6-1/2
Connector Type 5-way post
Power Range 20-200
Sensitivity 90 dB
Impedance (Ohms) 8
Frequency Response 55-26k Hz
Height (inches) 7-13/16
Width (inches) 24-1/16
Depth (inches) 14-1/4
Weight 29 lbs
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research

Driver Technology
Enclosure Design
Mounting Options

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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

High performance and looks good too [ GREGORY V  Jun 18, 2017 ]
cs1 to small [ Adrian  Feb 21, 2017 ]
Good price, good reviews, and I already own Polk RTi tower speakers. This center channel speaker is supposed to be timbre-matched to my towers. [ Andy  Sep 20, 2016 ]
My current center channel is a Polk. i am getting ready to upgrade my TV from 52" to 70" I figure is time to upgrade my surround sound as well. I like the reviews on the center channel and its affordable to buy. [ Judy  May 22, 2016 ]
Upgrade from my current old center speaker [ Todd  Jan 17, 2016 ]
To hear better vocal sounds on my home theater that has two Polk RTiA7 front speaker, Polk powered DSW Pro 660 wi sub, (4) FXiA5 surround speakers, (4) RT-620 ceiling speakers all powered by a Marantz SR7009 receiver setup for Dolby Atmos. Viewing on an Epson PowerLight Pro Cinema 6030 UB with a 120" screen. Really great for family movie night!!! [ Frank  Dec 29, 2015 ]
Want to upgrade from my Polk CS10 and this one has great reviews. [ CHARLES  Dec 05, 2015 ]
Mainly customer feedback and the sale price. [ Joe  Jun 16, 2017 ]
Reputation brought me to Polk, and after a year with the CSi A6 I can testify to the quality. It has brought my home theater to life, and corrected the sound of voices in movies, which used to sound muddy on just my old Technics towers. Also works great with old classic movies in mono, which I watch a lot of. [ steven  Jun 08, 2017 ]
Because it matched my Polk Rti A9's fronts and Rti A3's.surrounds. [ Steven  Mar 16, 2017 ]
Affordable quality center channel. [ ROBERT  Feb 02, 2017 ]
Purchased this product to go with my RTI A5 and I'm very pleased with this center channel. [ Christopher  Jan 03, 2017 ]
crutchfield stands behind their products. [ Daniel M.  Nov 22, 2016 ]
Have been wanting to upgrade my basement speaker system (from an old JBL Northridge system), read great reviews abut Polks and decided to give than a try. Very glad I did! This CC sounds and looks great! [ Jackie  Aug 08, 2016 ]
I'm slowly building a home theater system. I got this center channel to go with the existing RTiA7 front main speakers and polk subwoofer. One of these days I'll add the RTiA1s in the rear to finish the setup. [ BRENT  Apr 25, 2016 ]
Feedback [ Peter  Apr 06, 2016 ]
Good reviews, and matches/compliments the RTI A9's and A4's I purchased as well [ James  Feb 27, 2016 ]

3 questions already asked

Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Kenny  Aug 24, 2016 ]  Staff
I dont know the exact dimensions of the box but its pretty much the same exact size of the speaker, the speaker fits snug in the box. and the dimensions of the speaker a rite on crutchfields site [ STEVE  Jul 04, 2015 ]
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Krissy  Sep 19, 2014 ]  Staff
I put my speaker below the TV and on top of the console. If you put it inside the ported bass speakers will reflect sound inside the console instead of out into the room. I have a cherry console and the speaker looks great sitting on top. Furniture quality cherry. Everyone is impressed with the size and sound of my center speaker. Enjoy. I own two for different systems. [ GARY  Mar 31, 2016 ]
i put my center speaker directly below the screen on top of the consul so i could get the voice souhds as close to the people on the screen and be realistic as possible. it is perfict at that location for me. [ MARK T  Mar 31, 2016 ]
If space is an issue, I would highly recommend the Polk Audio CSi A4. The CSi A4 is just as good and will save you money and space in console for the ported bass on rear speaker. [ ROGER A  Mar 31, 2016 ]
I have mine on a shelf in a cabinet below my tv and am satisfied with the sound. [ Alan B.  Mar 31, 2016 ]

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