Skip Navigation

Polk Audio Signature S20

Bookshelf speakers (Washed Black Walnut)

21 Reviews | 2 questions - 5 answers

Item # 107SIGS20

In Stock

 Ships FREE

Add to Cart

Ask an expert

Our VA-based experts can help.

1.844.889.7506

Chat

Overview

Our take on the Polk Audio Signature S20

Polk's Signature S20 bookshelf speakers are an excellent choice for high-impact surround sound and detailed high-resolution stereo music. Their curved edges and sleek black or walnut finish make them an attractive addition to any room.

Rich home theater sound

Polk's Signature S20 bookshelf speakers are an excellent choice for high-impact surround sound and detailed high-resolution stereo music. Their curved edges and sleek black or walnut finish make them an attractive addition to any room.

Polk Signature S20 bookshelf speakers

Built for smooth sound

The S20s are made with high-quality materials for natural, low-distortion sound. Each cabinet houses a 1" high-resolution Terylene dome tweeter for clear, detailed highs and realistic reproduction of instruments and vocals. The highly efficient 6-1/2" Dynamic Balance® woofer is made of lightweight yet durable mica-reinforced polypropylene. Non-resonant MDF (Medium Density Fiberboard) cabinets and anti-diffraction magnetic grilles 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 and Polk Signature S15
Center channel: Polk Signature S30 or Polk Signature S35
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: 39-40,000 Hz
  • sensitivity: 88 dB
  • 8-ohm impedance
  • handles up to 125 watts
  • 1" Terylene high-res dome tweeter
  • 6-1/2" mica-reinforced polypropylene Dynamic Balance® cone driver
  • 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
  • 8-9/16"W x 14-3/4"H x 13-13/16"D
  • weight: 17 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • 2 Bookshelf loudspeakers
  • 2 Grilles (attached)
  • 8 Self-adhesive rubber feet
  • Owner's Manual
  • Online Product Registration
Reviews

Polk Audio Signature S20 Reviews

Average Customer Review(s):

(21 Reviews)
rewards card
Great Gear Giveaway

Submit a review and enter to win a $350 rewards card

Review this product

Thanks for submitting your review

Most reviews are processed and published within 5 business days. You will receive a confirmation email once your review has been published.

Your Review

Use the stars below to rate the overall product on a scale of 1-5
1500
Upload your photos

Not visible. Email associated with order.
(e.g., Charlottesville, VA)

Additional Fields (optional)

500
500

By submitting this review, you agree to our terms and review guidelines.

Filter by rating

Customer photos


<< >>
Details

Hands-on research

Features and Specs

Enclosure Bass Reflex
Video Shielded No
Tweeter Type Dome
Tweeter Size (inches) 1
Midrange Size (inches) N/A
Woofer Size (inches) 6.5
Woofer Composition Mica-reinforced polypropylene
Woofer Surround Butyl rubber
Power Range 20-125
Sensitivity 88 dB
Impedance (Ohms) 8
Frequency Response 39-40k Hz
Connector Type 5-way post
Bi-amp Inputs No
Height (inches) 14-3/4
Width (inches) 8-9/16
Depth (inches) 13-13/16
Weight (pounds) 17
Mounting Bracket Included No
Recommended Stand Height (inches) 24-28
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research

Features

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 S20 bookshelf loudspeaker incorporates a Dynamic Balance two-way driver array with one 1" tweeter and one 6.5" woofer.

  • Hi-Res 1" Terylene Tweeter: The Signature S20 bookshelf 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.
  • 6.5" Mica-Reinforced Polypropylene Woofer: The Signature S20 bookshelf speaker employs one 6.5" Dynamic Balance low distortion mica-reinforced polypropylene cone woofer for clean, clear bass, better linearity, and increased dynamic midrange and midbass. This mica-reinforced polypropylene woofer features a butyl rubber surround, massive ceramic motor structure, and a high-temperature Conex fiber spider that combine to create a driver of exceptionally high efficiency, for clean, clear bass, better linearity, lower distortion, and greater durability.

Power Port Technology: The Signature S20 bookshelf incorporates Polk's Power Port technology with a 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 bookshelf 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 S20 includes an anti-diffraction magnetic grille for unaltered sound. The integrated magnets make it easy to attach and remove the grille from the bookshelf speaker.

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

5-Way Binding Posts: The bookshelf 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).

Applications & Placement: The Signature S20 bookshelf 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 S20 should be set to "Small" to filter out low bass frequencies.

  • 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 S20 should be placed on a side wall slightly behind and above the listening position. If you cannot place the speakers on the side walls, position them on the rear wall above the listening area.

Mounting Options: The S20 bookshelf loudspeakers come with self-adhesive rubber feet so they will sit safely and securely on your speaker stands or shelf. The included rubber feet add approximately 0.125" to the height of the speaker. The bookshelf 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.

Accessories
Staff Reviews

Product reviews from the Crutchfield Labs

Polk Signature Series home speakers give you big sound for your music and home theater. They're high-res certified, and they look great, too.

What are the Labs?
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

I have a polk subwoofer and two basic polk speakers i want to up grade [ John H.  Apr 23, 2018 ]
Great bass response, great looking, priced amazing [ Daniel  Mar 13, 2018 ]
i have a polk s35 center channel speaker and needed new speakers to match with the signature series line. [ brent  Jan 24, 2018 ]
reviews for bookshelf [ MIKE  Nov 19, 2017 ]
I loved the specs on these. Never really considered Polk in the past but after checking out the specs these had the best ratings in their price range. [ John  Jul 04, 2017 ]
Upgrade from my 17 year old Polk speakers [ William  May 10, 2017 ]
Was comparing S20 with Elac B6. Both appeared to be great speakers. I have a polk center channel and was a little concerned about the base on the Elac. Look forward to connection these Polks to my system, [ Gary  Jan 03, 2017 ]
I have purchased Polk speakers from Crutchfield in the past and have always been very satisfied with both the speakers and the service.. [ W  Dec 06, 2016 ]
good reviews, these seemed best bookshelf speakers for bass [ thomas  Jan 04, 2018 ]
excellent match with Polk S60 [ ALEC  Nov 26, 2017 ]
I have other components from Polk and are from signature series and very much learned from enthusiasts that sound is very pleasing and smooth !!! [ Ghanshyam  Nov 25, 2017 ]

2 questions already asked

The Polk Audio S20 speakers offer no built-in provisions for wall mounting but you can use "side grip" wall-mount brackets like the Pinpoint AM41: http://www.crutchfield.com/p_121AM41B/item.html I hope that helps. My Bio: https://www.crutchfield.com/Support/Bio.aspx?bio=5 [ Ryan  Feb 16, 2017 ]  Staff
Yes, you won't need a sub for music. In fact I feel like it muddies the sound by adding a subwoofer. Not so sure about the tweeter question. I feel like it's a little harsh but not overwhelming. These sound incredible for the money. [ wesley  Jul 30, 2018 ]
I can only give you my opinion. I bought these for my home office, to be behind me while I am on the computer, playing music but sort of elevator music. I wanted reasonable good sound but my attention was on the computer. They did the job. Then I moved and had to rearrange the way I live. I started using the speakers to actually listen to the music and I am not liking them. I compare them to my Klipsch RP-160M (double the price) which sound much better. Hope this helps. [ Richard  Jul 29, 2018 ]
I found the tweeters to be quite crisp and clean. The bass is solid but not huge. I intended to add a sub woofer but found I didn't need it. I listen to classical, blues, classic rock and jazz so I don't know if the bass would be adequate for something that had heavy driving bass. The bass is also clean and well defined. A very nice set of speakers for most music. [ ED  Jul 29, 2018 ]
They do quite well at the high end range for high res music, the lows drop off significantly though on the lower end. I own the S60's as well, full range with zero fatigue. I also own Definitive Technology Pro Monitor 800's 1000's SM55 and SM65, they 55 & 65's are no longer available but I know how well the def tech line produces lows....If it were me I might actually get the SM45's or Pro Monitor 1000's both of those will have less drop off on the lower end. Plus it really depends on what you are powering them with...a higher end 2 channel separate amp, or higher end integrated 2 channel amp, with those (vs a receiver) it will dramatically improve the sound quality as well. No sub...again depends on a lot of factors, in particular what type of music and quality, you will be listening to. Hope that helps in some way, if not feel free to ask me another question. [ ANDREW  Jul 29, 2018 ]
Articles