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Polk Audio Signature S30

Center channel speaker (Classic Brown Walnut)

16 Reviews | 1 question - 4 answers

Item # 107SIGS30W

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Our take on the Polk Audio Signature S30

A center channel speaker is one of the most important parts of any surround sound system. Serving up crisp, clear dialogue, Polk's Signature S30 is a perfect match — both in terms of stylish looks and clean sound — to the rest of the speakers in the Signature series.

Treat dialogue right

A center channel speaker is one of the most important parts of any surround sound system. Serving up crisp, clear dialogue, Polk's Signature S30 is a perfect match — both in terms of stylish looks and clean sound — to the rest of the speakers in the Signature series.

Polk Signature S30 center channel speaker

Built for smooth sound

The S30 is made with high-quality materials for natural, low-distortion sound. Housed within its cabinet is a 1" high-resolution Terylene dome tweeter for clear, detailed highs and realistic reproduction of vocals. Two highly efficient 5-1/4" Dynamic Balance® woofers are made of lightweight yet durable mica-reinforced polypropylene. The non-resonant MDF (Medium Density Fiberboard) cabinet and anti-diffraction grille provide an acoustically inert structure for reduced sonic interference. Polk's exclusive Power Port technology adds low-end impact.

Build a complete Signature system

Add more Polk Signature speakers for seamless surround sound.

Bookshelf speakers: Polk Signature S10, Polk Signature S15, and Polk Signature S20
Floor-standing speakers: Polk Signature S50, Polk Signature S55, or Polk Signature S60

Round out the low end with a Polk powered subwoofer.

Got wire?

Most speakers don't include any. Read our article about choosing and installing speaker wire.
Shop our selection of speaker wire.

Product Highlights:

  • frequency response: 42-40,000 Hz
  • sensitivity: 89 dB
  • 8-ohm impedance
  • handles up to 125 watts
  • 1" Terylene high-res dome tweeter
  • dual 5-1/4" mica-reinforced polypropylene Dynamic Balance® cone drivers
  • Power Port® technology for better bass response
  • non-resonant MDF cabinet
  • 5-way gold-plated binding posts
  • anti-diffraction magnetic grilles for minimal sonic interference
  • 20-1/16"W x 7-9/16"H x 10-5/8"D
  • weight: 19 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Center-channel loudspeaker
  • Grille (attached)
  • 4 Self-adhesive rubber feet
  • Owner's Manual
  • Online Product Registration

I purchased this after receiving a pair of S15's as a gift and was blown away how good this speaker sounds. Great value for the price and cant wait to add another set of Polks for the rear now.

Sean, Bakersfield, CA


Polk Audio Signature S30 Reviews

Average Customer Review(s):

(16 Reviews)

Very Impressed

Sean from Bakersfield, CA on 12/10/2018

Crutchfield Customer Review (What's this?)

I purchased this after receiving a pair of S15's as a gift and was blown away how good this speaker sounds. Great value for the price and cant wait to add another set of Polks for the rear now.

Pros: Great sound solid construction Value

Cons: Maybe a bit big if you are looking for a compact speaker

Great Speaker

Omar from Longview, TX on 10/27/2018

Crutchfield Customer Review (What's this?)

Great speaker and good quality and sound loud and clear i have this center speaker along with two pairs of the S15 bookshelf speakers in my home theater and i like them. They sound good on music, games, and movies overall good speaker.

Pros: Good sound mids and highs range are great and clear

Cons: Little bit big for a center channel, but that's all

Great speaker for the price

Jordan from Jenkintown, PA on 9/22/2018

Crutchfield Customer Review (What's this?)

For the price, this is definitely one of the best center channel speakers i have bought. Id say slightly better for home theater applications than music, but still great all around.



Polk Signature S30

Tom from Bayonne, NJ on 9/21/2018

Crutchfield Customer Review (What's this?)

Have the S35 currently, but just a tad too thin (sound-wise) when paired with the S60's. Will now use it for a center back surround speaker. Got two of the s30's, which now flank my plasma screen. Sounds much better/fuller now. Excellent speaker(s)



Get it!

Nicholas from Akron, OH on 9/1/2018

Crutchfield Customer Review (What's this?)

Tried both the polk 35 and the S30...Both speakers are fantastic! I originally started with the S 35 thinking that more expensive meant better. It was great tons of detail and it was a huge plus that it was low profile but I felt that it was a little thin for my set up with the s60 floor standing matter how I adjusted my bass management it didn't have the impact I was searching for. So I took a chance and bought the S 30 to give it a try. Even before rerunning Audyssey xt32 I noticed a difference...Although I feel the S 35 offers a tad bit more detail the S 30 is definitely a fantastic choice if you're looking for that big movie sound! It's definitely a huge speaker so make sure you have room for it! I did love the S 35 so it is now in a different system!

Pros: Big strong sound, very well built

Cons: None

Polk Audio Signature S30

Justin from VA on 8/8/2018

Crutchfield Customer Review (What's this?)

Great sounding speaker, finally upgrading my old system and made a huge difference having a better center speaker. Should have done this years ago.

Pros: Frequency range, sound output, design


Upgrading my Onkyo HTIB System

Travis from Indianapolis, IN on 6/19/2018

To give some backstory: I am upgrading from an Onkyo HTIB system. It was the HTS-7800 system that I also purchased a couple of years ago. I spent a lot of times in forums and reading reviews to come to this buying decision. Several people go with the S35 over this because of the size, but I am so happy I chose the S30 instead. I played close to 8 different scenes from several different movies. I played them on my Onkyo Set up, then moved the speaker wires over to the S30 and repeated this process. Every single time I played the same scene on the S30 I was surprised. I was hearing details that I couldn't even hear with my Onkyo set-up. The room felt more "full" the sounds felt more natural and less like a speaker. I literally couldn't be happier with my choice. After running the AccuEQ calibration it literally changed my entire Home Theater Experience just from one speaker. There is a downside though. The speaker did expose my others. It gave me the itch to want to upgrade everything else as well. The S15's are the next item on my list and I can't wait to add them to my system. Beautifully made speaker, affordable price, and excellent upgrade from my HTIB set-up.



Polk Audio Signature S30

Crutchfield customer from Murfreesboro, TN on 5/23/2018

Crutchfield Customer Review (What's this?)

Very nice speaker. Solid build and good sound. Very good at the price.



Great distinct sound

Raymond from Lexington, SC on 4/10/2018

Crutchfield Customer Review (What's this?)

The best speaker with distinct sounds that allow for wonderful listening.

Pros: Fit in my existing cabinet

Cons: None

Polk Audio Signature S30

Connie from Roseland, NJ on 11/4/2017

Crutchfield Customer Review (What's this?)

The Polk Audio Signature S30 center channel speaker is the perfect compliment to my system. When watching a movie, the clarity of the speaking voices is exceptional. Another nod to Crutchfield, and their representative Ziggy, for excellent service.



Polk Audio Signature S30

Wally from Bartlett, IL on 10/9/2017

Crutchfield Customer Review (What's this?)

Received in two days, perfect condition, sounds great, price the same another online retailer. Very happy with my purchase. Will definitely be shopping at Crutchfield again in the future.

Pros: Much easier to understand TV dialog now.

Cons: None

Polk Audio Signature S30

Ron from Fresno, Ca. on 4/28/2017

Crutchfield Customer Review (What's this?)

I wanted a softer sound for my C speaker, but a speaker that could handle just about anything I throw at it. Keep in mind that this is a deep speaker, so check mount location depth first.

Pros: Smooth sound, wide frequency response, it has plenty of db output, even with my klipsch large bookshelf speakers an sub woofer.

Cons: Speaker depth, check your perfered mount location for enough mount depth.

Polk Audio Signature S30

Crutchfield customer from Escondido, CA on 3/28/2017

Crutchfield Customer Review (What's this?)

The problem (with the original center speaker): background sounds drowned out dialog - replaced original center speaker with Polk Audio S30, problem solved!



Polk Audio Signature S30 BK ea

Joseph from Pittsfield,maine on 3/27/2017

Crutchfield Customer Review (What's this?)

Nice sounding center channel . Looks great.

Pros: Sounds good and looks good.

Cons: Big speaker for a center channel.

Polk Audio Signature S30

Crutchfield customer from Chickasaw Nation on 12/26/2016

Crutchfield Customer Review (What's this?)

Our house came with 15-year-old Paradigm speakers that sounded great at high volumes but totally lacked dialogue crispness throughout their range and totally garbled speech at any low-to-moderate volume. On Crutchfield's recommendation (thanks, Mac!) we replaced the center-channel with this Polk S30. The difference was immediate and amazing. Now, we can understand the dialogue even at moderate volumes, while music/effects remain sharply nuanced at all volume levels. If you read the specs, the S30 has a very wide frequency response range for the price. These worked great for us, and we're totally pleased with the upgrade.



Nice Improvement

Scott from Palmerton, PA on 12/25/2016

Crutchfield Customer Review (What's this?)

I replaced at 16 year old Energy center panel speaker the the signature 30 and the Tv dialog is much clearer now. I'd say money well spent.

Pros: Cleaner TV dialog

Cons: None


Hands-on research

Features and Specs

Enclosure Bass Reflex
Tweeter Dome
Midrange size (inches) N/A
Woofer size (inches) 5-1/4
Connector Type 5-way post
Power Range 20-125
Sensitivity 89 dB
Impedance (Ohms) 8
Frequency Response 42-40k Hz
Height (inches) 7-9/16
Width (inches) 20-1/16
Depth (inches) 10-5/8
Weight 19 lbs
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research


Dynamic Balance Drivers: 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. Using just the right materials enables Polk to eliminate issues that reduce speaker performance and tune out performance-robbing resonances before they occur. Dynamic Balance ensures a rich, clean, full-range sound no matter what you're listening to. The Polk Signature S30 center-channel loudspeaker incorporates a Dynamic Balance two-way driver array with one 1" tweeter and two 5.25" woofers.

  • Hi-Res 1" Terylene Tweeter: The Signature S30 center-channel loudspeaker utilizes Polk's newly designed 1" Terylene tweeter to deliver clear and detailed high-end response for improved vocals in movies and music. It will support high frequencies up to 40kHz to perfectly reproduce the latest high-resolution audio files with improved audio extension, earning Hi-Res Audio Certification.
  • Two 5.25" Mica-Reinforced Polypropylene Woofers: The Signature S30 center-channel speaker employs two 5.25" Dynamic Balance low distortion mica-reinforced polypropylene midrange cone woofers for clean, clear bass, better linearity, and increased dynamic midrange. These mica-reinforced polypropylene midranges feature butyl rubber surrounds, massive ceramic motor structures, and high-temperature Conex fiber spiders that combine to create drivers of exceptionally high efficiency, for clean, clear bass, better linearity, lower distortion, and greater durability.

Power Port Technology: The Signature S30 center-channel incorporates Polk's Power Port technology with one specially designed rear-firing port. Power Port technology smoothly transition air flow from inside the speaker into your listening area for deep, extended bass impact while minimizing turbulence and distortion. Polk's patented Power Port technology delivers 3dB more bass response than a traditional ported speaker.

Non-Resonant Enclosure: The center-channel speaker's strong, rigid and acoustically inert enclosure reduces unwanted internal standing waves for less audible coloration. And non-resonant Meddite MDF construction, extra bracing, and a thick front baffle ensure a more lifelike sound. The enclosure's curved edges not only look cool, they reduce standing waves inside the cabinet for less audible coloration. The enclosure features a beautiful black washed walnut finish.

Anti-Diffraction Magnetic Grille: The Signature S30 includes an anti-diffraction magnetic grille for unaltered sound. The integrated magnets make it easy to attach and remove the grille from the center speaker.

Two-Way Crossover: The center-channel speaker employs a high-performance two-way cascading crossover array (2.5kHz) for seamless blending and optimum time alignment of the tweeter & woofers, creating a lifelike soundstage.

5-Way Binding Posts: The center-channel loudspeaker features 5-way binding posts for a secure connection to your speaker wire. The 5-way binding posts will accept bare wire (up to 10AWG), pin-connectors, spade-connectors, and banana plugs (single or dual). The speaker terminals are color coded for easy identification between positive (red) and negative (black).

Application, Placement & Mounting Options: The Signature S30's primary use is as a center-channel loudspeaker for home theater applications. The Signature S30 can be mounted horizontally, under or above your flat-panel TV. You can simply place the center-channel speaker on a table-top or shelf, or wall-mount the center-channel using its integrated keyhole slots on the back. The included rubber increase the height of speaker by 0.125").

Note: The center speaker does not include any type of provisions for wall-mounting.

Signature Series: Polk designed its Signature Series of loudspeakers to bring a big surround sound and a live music experience into the comfort of your living room at an affordable price. Featuring Hi-Res certification with a new high-resolution Terylene tweeter, redesigned Dynamic Balance drivers, precision crossovers, an anti-diffraction magnetic grille, modern cabinet styling and exclusive Power Port bass enhancing technology, Polk's Signature series loudspeakers deliver crystal clear highs, detailed midrange, and deep bass; plus they look great in almost any decor. The Signature Series by Polk consists of two center-channel speakers, three bookshelf loudspeakers, and three tower speakers.

Note: You may also want to add one of Polk Audio's powered subwoofers (sold separately) for even more bass response.

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?

Recommended by Eric for both home theater -and- music. Great reviews online as well. [ Chris  Jan 15, 2019 ]
Specs are just what is needed and the price is very competitive. [ Glenn  Oct 06, 2018 ]
Matching center to go with the S50's. [ Steven  Nov 28, 2017 ]
The Signature series was my first choice based on value and the great reviews. I've had a 'phantom' center channel for a while, and needed a real 5th wheel. This one (vs. the S35) has more 'matched' mid-woofers to the other items I ordered. From the sounds of the review, you can't go wrong with either center channel in the series. [ Damon  Nov 24, 2017 ]
Upgrade from my 17 year old Polk speakers. [ William  May 10, 2017 ]
This will be a matching center for my Polk Signature S55 towers. The Signature series are replacing the Polk RTi6/CSi5 setup. [ LOWERY  Mar 19, 2017 ]
better long term solution [ Brian  May 27, 2018 ]
Choice between this, S30, or the slimmer S35. No Replacement for Displacement. :o) [ James  Sep 19, 2017 ]
I purchased the S30 center channel in the Walnut finish because I think it looks pretty classy for what is considered to be a series of "budget" speakers from Polk. Additionally, I purchased the S30 center channel to timbre match the Walnut S60 floor standing speakers that I bought from Crutchfield to create a seamless front soundstage in my Home Theater. [ Victor  Jun 23, 2017 ]

1 question already asked

The S 30 has changed the game for us. My wife is deaf as a post in the wind. She never complains anymore. Worth it's weight in gold. [ Robert  Nov 21, 2018 ]
No idea. The s30 is great and delivers clear dialogue. I only have the s30 so i can't compare. [ Jonathan  Nov 21, 2018 ]
I have the S30 and it's perfect for movies in my opinion. I can't comment on the s35 sound quality since I haven't listened to them, but I'm sure it is a great performer. Although the smaller drivers (3 inches vs 5.25) may not be able to give you that extra oomph a bigger driver can. Another thing to consider is the space, photos can be deceiving the s30 is big in all dimensions specially the depth when compared to other center channels because of the Power Port on the other hand the s35 is a bit wider but slimmer than the s30 so if your space is limited then I would go with the s35. [ YAER  Nov 21, 2018 ]
I originally purchased the s30 but returned it due to fitment. I would imagine so with the bigger drivers. I currently have the s35 and love it. Though with smaller drivers it has multiple small ones. I have a fairly small-medium size livingroom and have zero complaints with the s35. If asthethics and placement is not an issue. Go with the s30, to save a buck [ Van  Nov 21, 2018 ]