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Polk Audio Signature S50

Floor-standing speaker (Washed Black Walnut)

Item # 107SIGS50

Polk's Signature S50 floor-standing speaker delivers big sound without breaking the bank.

Polk's Signature S50 floor-standing speaker delivers big sound without breaking the bank.

Item # 107SIGS50

Ships free

In stock

C$399.99 Sale: -C$150.00 off Sale: ends 10/24

C$249.99 each

About the Polk Audio Signature S50

Dynamic, room-filling sound

Polk's Signature S50 floor-standing speaker delivers big sound without breaking the bank. As front speakers in a home theater setup, or as stereo speakers for high-resolution music, a pair of these towers will give you a real bang for your buck, serving up clean, detailed sound. And their sleek, stylish look makes them a choice addition to your living room décor.

Dynamic, room-filling sound

Polk's Signature S50 floor-standing speaker delivers big sound without breaking the bank. As front speakers in a home theater setup, or as stereo speakers for high-resolution music, a pair of these towers will give you a real bang for your buck, serving up clean, detailed sound. And their sleek, stylish look makes them a choice addition to your living room décor.

Polk Signature S50 floor-standing speaker

Built for smooth sound

The S50 is made with high-quality materials for natural, low-distortion sound. Its cabinet houses a 1" high-resolution Terylene dome tweeter for clear, detailed highs and realistic reproduction of instruments and vocals. Two highly efficient 5-1/4" Dynamic Balance® woofers are made of lightweight yet durable mica-reinforced polypropylene. Non-resonant MDF (Medium Density Fiberboard) construction and an anti-diffraction magnetic grille provide an acoustically inert structure for reduced sonic interference. Polk's exclusive Power Port technology adds bass 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
Center channel: Polk Signature S30 or Polk Signature S35

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: 33-40,000 Hz
  • sensitivity: 89 dB
  • 8-ohm impedance
  • handles up to 150 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
  • dual 5-way gold-plated binding posts
  • anti-diffraction magnetic grilles for minimal sonic interference
  • includes stabilizing feet
  • 7-1/2"W x 37-7/16"H x 11-1/16"D (10-5/16"W with feet)
  • weight: 32 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee
  • MFR # AM9530-A

What's in the box:

  • Floorstanding loudspeaker
  • Grille (attached)
  • 4 Feet (pre-installed)
  • Owner's Manual
  • Online Product Registration

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Polk Audio Signature S50 reviews

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Crutchfield response

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More details on the Polk Audio Signature S50

Stacey B.

Features & specs

Enclosure Bass Reflex
Finish Meddite MDF
Color Black
Tweeter Dome
Tweeter Size (inches) 1
Midrange Size (inches) N/A
Woofer Size (inches) 5.25
Woofer Composition Mica-reinforced polypropylene
Woofer Surround Butyl rubber
Built-in Powered Sub No
Video-Shielded No
Connector Type 5-way post
Bi-amp Inputs Yes
Parts Warranty 5 Years
Labor Warranty 5 Years
Power Range 20-150
Frequency Response 33-40k Hz
Sensitivity 89 dB
Impedance (Ohms) 8
Subwoofer Amp Power ---
Height (inches) 37-7/16
Width (inches) 10-5/16
Depth (inches) 11-1/16
Weight 32 lbs

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 S50 floor-standing 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 S50 floor-standing loudspeaker utilizes Polk's newly designed 1" Terylene tweeter to deliver clear and detailed high-end response for realistic reproduction of vocals and instruments. 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.
  • Dual 5.25" Mica-Reinforced Polypropylene Woofers: The Signature S50 floor-standing speaker employs two 5.25" Dynamic Balance low distortion mica-reinforced polypropylene cone woofers for clean, clear bass, better linearity, and increased dynamic midrange and midbass. This mica-reinforced polypropylene woofers 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 S50 floor-standing incorporates Polk's Power Port technology with a specially designed down-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. Because the port is located on the bottom of the floor-standing speaker, its not necessary to position to the loudspeaker a certain amount of feet from wall - giving you greater placement flexibility.

Non-Resonant Enclosure: The floor-standing 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 S50 includes an anti-diffraction magnetic grille for unaltered sound. The integrated magnets make it easy to attach and remove the grille from the floor-standing speaker.

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

Dual 5-Way Binding Posts: The floor-standing loudspeaker has two sets of 5-way binding posts connected by jumpers. Using the dual 5-way binding posts, you can bi-amp or bi-wire the speakers. 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).

Dual-Floor Compatible Feet: Customized for improved stability and bass coupling to the floor, the floor-standing loudspeaker's feet are designed for both carpet and hard floors. The feet come pre-installed and should not be removed.

Applications & Placement: The Signature S50 floor-standing speakers can be used as front and/or surround speakers in a home theater setup. They can also be used in a simple stereo application. If your AV receiver offers built-in bass management, the S50 should be set to "Large" for an unfiltered, full-range audio signal.

  • Placement for Front Speakers: As a pair of front speakers in a home theater or stereo setup, create an equilateral triangle between the speakers and the listening position - with the speakers placed as far apart from one another as the listeners are sitting from them.
  • Placement for Surround Speakers: As surround speakers, the S50 should be placed on a side wall slightly behind the listening position. If you cannot place the speakers on the side walls, position them on the rear wall just behind the listening area.

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.

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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 ]
Great Price point [ Troy  Jan 01, 2019 ]
to upgrade my aging home speakers from crutchfield [ Ildefonso G.  Nov 29, 2018 ]
I enjoyed a online chat with a Crutchfield rep who helped work through what i need to complete my 7.2 surround sound. Troy was very helpful. I bought this to add to system at his suggestion. We worked room size, layout, and other variables. He also sent links to articles to read on the website that were very informative. It was great! [ Lyle  Oct 11, 2018 ]
price and performance.....the reviews were really good. [ Tony  Sep 29, 2018 ]
POLK [ john michael  Aug 24, 2018 ]
I wanted to upgrade to some nicer floor standing speakers, but don't really have the room or space for the larger models. Reviews on all models including these seemed really good. Even though this is the smallest model of the 3, I'm hoping it will be quite an upgrade from what I currently use. [ MICHAEL BRETT  Jul 19, 2018 ]
I have four of the S10 speakers and the S35. Hunter at Crutchfield suggested it was best to stay in the same series. This will let me turn two of the S10 speakers into atmos speakers and the S50s will take over as the front right and left. [ Miles  Mar 11, 2018 ]
I currently have a Polk Audio RM705 5.1. Thinking about upgrading. Spoke with Mac in customer support about upgrading to 2 Polk S50 towers. Appreciated his help and guidance. I may also upgrade my center speaker to an S35 soon as well. Thanks! [ Roger  Dec 26, 2017 ]
The Polk Audio Signature S50 are a nice upgrade to my existing surround sounds system. I will use the S50 to replace my two front Infinity satellite speaker. Wolf provided excellent assistance in narrowing the field to my final decision. Thanks! [ ERIC  Dec 17, 2017 ]
Good reviews, newer technology [ Steven  Nov 28, 2017 ]
I like the customer service [ Doug  Nov 20, 2017 ]
Bought Polk S 60 and I love them, wanted 2nd pair , [ Dan  Jun 13, 2017 ]
the reviews on this speaker. [ J  Jun 06, 2017 ]
I love Polk Audio great speaker. [ Steven  Dec 24, 2016 ]

1 question already asked

I'm not to sure what bi wireing is but, I've seen a lot of people say they have there s50's bi wired. What does it do exactly? And I also have a pair of jbl's with dual 10s and they also have four terminal's , so my question is what does bi wireing do and how do you do it
[ Kody1  Mar 24, 2018 ]
4 answers
Basically you are delivering twice the power to your speaker. It's easy to do. Just run 2 wires from the receiver output and connect one to each terminal. You will get a much fuller sound from your speaker
[ William  Apr 04, 2018 ]
Separating the amplified power source to high/midrange from the woofers. It theoretically should produce better sounds with less distortion. To do it, you need to remove the copper bridge connecting two binding posts, connected each of the binding post set directly to the applied power source. Personally I think it's an overkill for these speakers due to the driver size.
[ KUO H  Apr 04, 2018 ]
When you bi=wire your speakers you are sending your signal to the woofer and the tweeter separately. Polk tells you how to do it in the speaker manual. Essentially, you pull the chrome jumper that connects the two speaker terminals for each speaker in the box. At your amplifier or receiver, or whatever, take a speaker cable and twist the ends together on one end and connect that to the positive terminal. At the other end (SPEAKER END) connect one wire to the upper terminal and one to the lower terminal. Do the same for the negative terminal (black terminal), Effectively, it bypasses a lot of circuitry in the speaker by doing this and it made a tremendous difference in my S50;s. They a;ready sounded good, but once I bi wired them they became much more refined and definitive sounding. Hope this helped.
[ ALLAN  Apr 04, 2018 ]
Crutchfield has a great article about it - Hope this helps!
[ Mike  Apr 04, 2018 ]

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