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Polk Audio Signature S55

Floor-standing speaker (Washed Black Walnut)

Item # 107SIGS55

Polk's Signature S55 floor-standing speaker will rock your living room.

Polk's Signature S55 floor-standing speaker will rock your living room.

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Item # 107SIGS55

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$315.50 each

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About the Polk Audio Signature S55

A high-performance tower for movies and music

Polk's Signature S55 floor-standing speaker will rock your living room. Use a pair for stereo music or as front speakers in a surround sound setup. Either way, they'll deliver refreshingly clean, detailed sound. And their sleek, rounded design will make a nice addition to your room.

A high-performance tower for movies and music

Polk's Signature S55 floor-standing speaker will rock your living room. Use a pair for stereo music or as front speakers in a surround sound setup. Either way, they'll deliver refreshingly clean, detailed sound. And their sleek, rounded design will make a nice addition to your room.

Polk Signature S55 floor-standing speaker

Built for smooth sound

The S55 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 6-1/2" 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: 32-40,000 Hz
  • sensitivity: 90 dB
  • 8-ohm impedance
  • handles up to 200 watts
  • 1" Terylene high-res dome tweeter
  • dual 6-1/2" 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
  • 8-1/2"W x 41-9/16"H x 12-3/8"D (11-3/4"W with feet)
  • weight: 44 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee
  • MFR # AM9531-A

What's in the box:

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

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

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Polk Audio Signature S55 reviews

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More details on the Polk Audio Signature S55

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) 6.5
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 20-200
Frequency Response 32-40k Hz
Sensitivity 90 dB
Impedance (Ohms) 8
Subwoofer Amp Power ---
Height (inches) 41-9/16
Width (inches) 11-3/4
Depth (inches) 12-3/8
Weight 44 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 S55 floor-standing loudspeaker incorporates a Dynamic Balance two-way driver array with one 1" tweeter and two 6.5" woofers.

  • Hi-Res 1" Terylene Tweeter: The Signature S55 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 6.5" Mica-Reinforced Polypropylene Woofers: The Signature S55 floor-standing speaker employs two 6.5" 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 S55 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 S55 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 S55 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 S55 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 S55 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?
price quality [ Brian  Dec 20, 2017 ]
The Signature series has such great reviews are beautiful because someone put thought into their 'design' not just their 'engineering'. The high value doesn't hurt, either. That said, the main reason for the 55s is I estimate the 2 x 6.5" arrangement is just enough to fill my listening space without a sub. I may come back for an HTS sub, though. [ Damon  Nov 24, 2017 ]
Value. Matches other speakers in surround setup. Quick Crutchfield delivery. Polk reputation. Quality sound for the price point. [ MATTHEW  Nov 23, 2017 ]
Like that it matches the center and the acoustics were recommended [ Mark  Oct 10, 2017 ]
Quality and price. [ Ben  Jun 05, 2017 ]
The Crutchfield advisor, Ryan, really helped me get back up to speed on deciding on a speaker that would match my existing system but be a substantial upgrade after my old tower speakers cracked a driver. Really appreciate his patience and advice in comparing different options to find a reasonable replacement. [ Brendan  Mar 04, 2017 ]
I had already bought one for the left setup need one more for right side of the setup. Speakers are great, you get what you spend [ GARY C  Feb 25, 2019 ]
I'm an organist, and this is one of the few speakers that can crack 32 hertz (hz); and that is right down there in the land of the 16 foot and 32 foot pipes, the ones that shake your body. [ Timothy  Nov 27, 2018 ]
Reviews say that this is a great middle of the range speaker that is good for both music and movies. The quality and reputation of Polk Audio. Crutchfields knowledge center, fair price and fast shipping was a factor as well and the point program. Cant wait to get them and test them out. [ Eric  Oct 16, 2018 ]
Best low end at an affordable price [ William  Oct 12, 2018 ]
I've heard polk speakers and I like them. I thought the price was very good. [ GERALD  Feb 14, 2018 ]
Needed ah floor speaker. And never had pros with this brand. Should be great! [ GARY C  Aug 06, 2017 ]

2 questions already asked

I don't understand the biwiring or biamp option on the Polk speakers... what does it mean?
[ Jose  Apr 03, 2017 ]
2 answers
There are two sets of binding posts. One pair is for the upper frequency range, one for the lower frequency range. There is a metal strip that onnects the two (upper and lower) binding posts. When not bi-amping, then just connect your speaker wire to either the upper or lower posts. When bi-amping, then you use an electronic crossover to separate the higher and lower frequencies. In this case, the crossover outputs have two sets of speaker wire outputs, one set for high frequencies one for low. If bi-amping, then you remove the metal strip connecting the two posts, and connect the high freq. speaker wire from the crossover to the upper post and the low freq. wire from the crossover to the lower post.
[ John  Apr 04, 2017 ]
I was curious about that as well. A Crutchfield advisor helped me with it. Basically, bi-amping allows the speakers to receive 2 channels from your receiver rather than 1. In other words, there are two sets of pos/neg posts on the back of these speakers. So, if your amplifier puts out 100w per channel, like mine does, I can now provide these speakers with 200w. You'll have to check your receiver to see if it has bi-amount outputs. My 2010 Onkyo receiver was set up with bi-amping and was labeled as such on the back, and for me I had the choice for either using the channel for high front or bi-amped speakers. The bi-amped output goes to the lower connections. The regular front output goes to the upper connections on the speakers. After setting it up, I also had to go through the setup menu for my receiver to tell it I was now using bi-amped speakers. You may also want to redo you equalization setup (using a setup mic) if your receiver has that feature to ensure to maintain balance for your surround sound. I'm being wordy in the explanation, but it was pretty simple to do, and you can send twice the power to the speakers - I get a noticeable difference! One last thought is to check the output of your receiver to ensure the speakers can handle the extra power. Hope this was of help.
[ Brendan  Apr 04, 2017 ]
For the owners of the S55 who may ALSO use them as " 2 channel stereo " listening.....Is the BASS good enough and deep enough to use them without a SUB WOOFER ? Do they really get down to 32 Hz (perhaps with some -dB)? THANK YOU IN ADVANCE FOR YOUR HELP AND REPLIES. JOHN C.
[ JOHN J.  Jul 07, 2017 ]
2 answers
Hi John Yes the S55 has great bass, haven't really turned off my sub woofer but I think it would do great. Hope the information I gave you will help. Terry
[ Terrence  Jul 09, 2017 ]
I would, it's not enough to operate without a sub if your expecting to get solid bass. I guess they do technically hit the low notes, and it provides good depth to the bass for surround sound, but it's just not going to provide anywhere close to the volume you're going to get out of a descent 12" sub.
[ Brendan  Jul 08, 2017 ]

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