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
- 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
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
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
- 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
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
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.