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Polk Audio CSi A6

Center channel speaker (Black)

95 Reviews | 8 questions - 38 answers

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Item # 107CSIA6B

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Was: $399.99

Special purchase: -$160.00

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Our take on the Polk Audio CSi A6

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.

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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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

What's in the Box:

  • One black 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

Polk Audio CSi A6 Reviews

Average Customer Review(s):

(95 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?

part of a surround system [ Magdiel  Nov 13, 2018 ]
Because Polk Audio is some of the best audio equipment I have ever heard! [ Lawrence Spence  Oct 16, 2018 ]
Very happy with sound quality of matching rti a7 Polk towers, bought this to complete the front stage package. [ GERALD H  Sep 29, 2018 ]
Had an older model from 2001 that had done very well. [ S  Sep 26, 2018 ]
Shane recommended it for better dialogue. [ Thomas  Sep 14, 2018 ]
I picked this center speaker to pair with my RTI A5 Tower Speakers. [ Jeff  Sep 12, 2018 ]
Good review and needed to update, price was fair. [ Lawrence  Aug 22, 2018 ]
I currently have Polk Audio RTI Tower Speakers. This Center Speaker is voice matched. [ STEVEN  Aug 21, 2018 ]
wanted to pair with the floor standing speakers I just bought [ HENRY  Jul 17, 2018 ]
This is an update the old center channel speaker I've had for 20 years and matches the reference speakers I have. [ Dale  Jul 07, 2018 ]
Same as the other speakers. [ J  Jun 30, 2018 ]
recommended [ BENJAMIN  Jun 27, 2018 ]
Value,price and quality [ David  Jun 20, 2018 ]
great price for the value [ DON  May 19, 2018 ]
Looks like the best deal for size and sound [ Michael  May 05, 2018 ]
Review ratings and the sound quality I believe will satiate my needs. I have been shopping for nearly 2 years to find a speaker set I would like, based on a recommendation from a friend that is a bit of an audiophile I went with the Polk product! Also to be noted is this is my first time purchasing from C-field... 99% of my business goes to Abt Electronics, they ship with no tax no shipping charges and meet or beat my best price... [ Thomas  Apr 27, 2018 ]
Reviews, recommendation from Crutchfield, and already have polk speakers [ David  Mar 01, 2018 ]
I chose this item because I have a pair of Rti A3 bookshelf speakers. [ Kenneth  Feb 27, 2018 ]
Sound very awesome and match with my Polk Audio RTi12 [ Thi  Feb 08, 2018 ]
To match my RTiA9 speakers Which are great speaker [ John  Jan 01, 2018 ]
Polk quality cruhfield customer service [ Daniel  Dec 09, 2017 ]
Great reviews [ DOUG  Dec 09, 2017 ]
Need an addition to the new a9 towers. Upgrading and adding to existing setup. Big power, big speakers, big time connections. Need lines and connections. More later. Work in progress. [ Duncan  Nov 30, 2017 ]
To match existing Polk speakers. [ ROBERT  Nov 25, 2017 ]
Highly recommended for my Polk Towers. [ Dave  Nov 18, 2017 ]
Need to wake up the Denon AVRX 6200H [ S  Nov 14, 2017 ]
Timbre matched to my front speakers. Love Polk for Home Theater. Black finish looks great in my setup. Great reviews from others whose opinions I trust. Recommended by those on Polk forums. Great Price + Great Quality + Great Performance + Great Longevity = AWESOME!!! [ Richard  Nov 02, 2017 ]
I chose this center since I already have a pair of Polk Audio RTi A7's. [ JACK  Oct 06, 2017 ]
I like Polk speakers. just bought 2 pair. Very good. [ RODNEY  Sep 27, 2017 ]
Recommended by Lucy R during Crutchfield home audio consulting process [ tyler  Sep 18, 2017 ]
Matches the front towers I currently own [ spears  Jun 25, 2017 ]
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 ]
to match my other polk speakers [ Bruce  Oct 23, 2018 ]
i have the rti a9 speakers [ fraser  Jul 18, 2018 ]
I am very familiar with the polk product line My main home theatre is all polk tower larger center speaker and large smaller rear so polk was my first choice to replace an older center speaker in my family room I felt the tonal qualities would blend well with my patchwork set up [ Milton  Jul 02, 2018 ]
I have the book shelf speakers and wanted to complete my set! Been using the book shelfs for a year but now ready for a center channel! [ Phil  Jun 18, 2018 ]
Reviews reported this the best the center Polk speakers. Supposed to sound awesome. [ Grant  May 16, 2018 ]
Awesomeness [ MATT  May 09, 2018 ]
Part of a matched system [ Charles  Mar 26, 2018 ]
I bought this to match my Cherry Polk A9s. [ L  Mar 08, 2018 ]
Polk is the best. i have done my research and i wanted to go with the highest model one but everyone said the speakers don't match and it will sound different. [ kris  Mar 08, 2018 ]
I chose this to match the other 2 just like it which I am using in my Home Theater setup as my L/C/R front channels. They will also match up with my 4 RtiA3 surrounds and my 4 RtiA1 I'm using as Dolby Atmos speakers. [ Sapaigos  Mar 02, 2018 ]
recommendation from crutchfield chat session [ Dwayne  Feb 28, 2018 ]
I have the Polk RTIA7's and wanted my Center Channel to match my system . These are beautiful speakers in the way they look and the way they sound ! Especially in the Cherry finish ! This line of speakers are a Absolute Value at the sale price and cannot go wrong if thinking about purchasing . [ Richard  Feb 16, 2018 ]
Recommended by Crutchfield Rep. wrt my side speakers currently owned. [ edward  Feb 08, 2018 ]
Allen helped me choose the best new center channel speaker for my existing system. My current center speaker had gone bad and I contacted Allen as he has helped me in the past with making informed decisions in putting my home theater system together. [ Randy L.  Feb 05, 2018 ]
Reputation and rating on multiple online sites... [ G  Feb 02, 2018 ]
Good history with Polk products [ Michael  Jan 30, 2018 ]
I choose this speaker after doing some research and the great reviews to pair with my Polk ATI a7 speakers [ carolyn  Jan 11, 2018 ]
This is the best center channel speaker in Polk Audio's RTiA series. [ M  Dec 29, 2017 ]
Matches my Polk Towers [ James  Nov 26, 2017 ]
Love Polk, this speaker mates well with the Polk Book shelves I purchased [ D  Nov 20, 2017 ]
Last piece of my polk system.having heard this center at volume,it is amazing.can not wait to get it hooked up. [ JEFFREY J  Oct 18, 2017 ]
My brother have this CSI A6 center speaker and sounds great. [ HITEN  Sep 25, 2017 ]
Polk makes the best speakers on the market. I've been a customer for many years. [ Douglas  Sep 08, 2017 ]
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 ]

8 questions already asked

I bought this speaker last year. It has great sound no problems. It is however about twice as big as the picture so it takes up a lot of space but makes up for it with the sound. If you can get it at the price shown it's a steal. Hope this helps you. Bill [ William  Nov 08, 2018 ]
I have had no issues with this center channel. I have a home theater and before I had a small Boston center channel and the sound was poor. When I changed over to this speaker the sound and sound quality was a huge difference. I highly recommend this speaker. I have a large subwoofer and no issues. I hope that answered your question. [ JOEL  Nov 03, 2018 ]
A center channel speaker is not a sub woofer. A passive radiator in a speaker box does not have current going to it, but it is a speaker with out a magnet. the cone produces sound because of the sound wave from the active speakers and helps in most cases to add a little bottom. [ JAMES M  Nov 02, 2018 ]
Yes, this is a great center channel speaker it really projects voices and other sounds so they are not lost among the L&R Main and Subwoofer output. [ Frank  Jan 01, 2018 ]
I bought a shelf kit from a local hardware store. You can then mount the shelf above or below the TV. [ JACK  Dec 20, 2017 ]
I used B Tech center mounts. You may also want to use a board cut to measure the speaker to sit on. If it is under your TV you are fine. If it is above your TV mounted closer toward the ceiling you may want to screw an "ibolt" in the back of the board and then use one or more electrical ties to secure the speaker. It may not be necessary, but that is what I did. [ JAMES M  Dec 18, 2017 ]
We have it on a shelf right above our receiver. I'm not sure if there is a good mount for this other than a shelf of some sort. [ Dan  Dec 18, 2017 ]
My polk unit sets on top of cabinet.Under a 65 inch flat wall mounted TV.??????Tom [ THOMAS J  Dec 18, 2017 ]
I'm no expert, but I run my center at full range since the receiver's sound processing is going to send the proper frequencies to the right places. I, too, have a Yamaha receiver, the RX-V671, and I simply set the rear speakers to small and the center to Large and the system sounds just fine. Hope this helps. [ S  Jul 22, 2017 ]
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
Yes, 14" [ Robert  Apr 18, 2018 ]
13 inch without the grill cover 14.5 inch with [ Paul  Apr 14, 2018 ]
It's actually 14.5 inches deep. [ SAMUEL  Apr 10, 2018 ]
14" - as per spec [ IAN  Apr 10, 2018 ]
24" wide, 9" tall, and 14 1/4 deep [ TODD  Apr 10, 2018 ]
13-3/8 inches deep, rear baffle to front, without grill...14-3/8 inches deep with grill. [ Kirk  Apr 09, 2018 ]
Yes, with the grille on it is 14 inches deep. 13.5 with the grille removed. [ Christelle  Apr 09, 2018 ]
With the speaker grille, 14 5/16 inches, without 13 5/16. [ Timothy  Apr 09, 2018 ]
I measured mine at 13.5 without the grill on the speaker. I'm thinking with the grill on, it will definitely be right at 14" deep. It is a sizable center speaker but I have no complaints on the sound quality at all. [ Randall  Apr 09, 2018 ]
The dimensions listed on Crutchfield are correct. Great speaker, I have matched it with A7's, and A1's as my rear surround. [ Steve  Apr 09, 2018 ]
Yes it is. I thought the same thing until it arrived. [ Christopher  Apr 09, 2018 ]
The specs on the depth are correct based on my measurements of the speaker. [ vinod  Apr 09, 2018 ]
From the front face with the black speaker dust cover removed to the back measured 13 and 1/4 inches and with the speaker dust cover in place, would be no more than 14 inches deep. The depth measurement checks out. [ Stephen  Apr 09, 2018 ]
Steve, the speaker is 14 1/4" deep, 24" wide, and 8" tall. [ CODY A  Apr 09, 2018 ]
Richard, The exact dimensions are 14.5 " deep, 24.125" wide, and 8.25" high. It sounds really good. Jeff Jeff [ JEFF  Jan 16, 2018 ]
The exact width of the CSI A6 is 24-1/16 W. [ MOHAMMED  Jan 15, 2018 ]
24 inches exactly. [ Eric  Jan 15, 2018 ]
I can't predict width variations of different CSi A6 speakers, but I can tell you than my particular speaker with the cherry finish measures exactly 24 inches in width [ STEVEN  Jan 15, 2018 ]
24 1/16 inches [ Luis  Jan 15, 2018 ]
14x7.8x24 is the dimensions [ Christopher  Jan 15, 2018 ]
It's 24 1/4 inches wide [ SAMUEL  Jan 15, 2018 ]
Twenty four (24") inches or sixty point nine six (60.96) cm centimeters is the center channel speaker width. [ Stephen  Jan 15, 2018 ]
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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