Polk Audio Signature Series S20 Bookshelf Speakers (Pair, Black) – 6.5” Driver, Surround Sound, Power Port Technology, Detachable Magnetic Grille (Discontinued by Manufacturer)
From the manufacturer
Expect Great Sound
Having built our reputation as 'The Speaker Specialists' for more than 40 years, we take pride in our superior sound and build quality.
For the people of Polk, building audio products is not just a job—it’s a passion. And if you’re going to remember one thing, remember this: We live by the truest principle of what audio should deliver—great sound at a great value for everyone!
Polk Signature Series HiFi Home Theater Speaker
Built to bring the big surround sound theater and music experience into the comfort of your living room, the Polk Signature Series continues in the Polk tradition of American HiFi.
A Dynamic Balance designed acoustic array, precision cross-overs, an anti-diffraction magnetic grille, modern cabinet styling and exclusive Power Port bass enhancing technology, you get elevated sound for movies, TV and music in a totally re-imagined design.
Polk Audio Signature S20 Compact Bookshelf Speaker
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Polk Dynamic Balance Designed Acoustic ArrayDynamic Balance mica-reinforced polypropylene cones with butyl rubber surrounds, a high-resolution Terylene tweeter, massive ceramic motor structures and high-temperature Conex fiber spiders combine to create drivers with exceptionally high efficiency, clean, clear bass, better linearity, lower distortion and greater durability. |
High-Resolution Audio PerformanceDeliver clear and detailed high end response for improved vocals in movies and music—plus, a minimum support of 40kHz to perfectly reproduce the latest high resolution audio files with improved audio extension. It’s like you’re right there in the studio or concert hall with the artist, hearing all the music you love in a whole new way. |
Exclusive Polk Power Port Deep Bass TechnologyPolk’s patented Power Port technology delivers deeper bass response than a traditional back-ported speaker. It smoothly transitions air flow from the speaker into your listening area for deep, extended bass impact while minimizing turbulence and distortion. |
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| Signature Series Bookshelf Speaker | S10 | S15 | S20 |
| Drivers | (1) 4" (10.16 cm) d (Round) Midrange - Dynamic Balance Mica Reinforced Polypropylene | (1) 1" (2.54 cm) d (Round) Tweeter - Terelyne Tweeter | (1) 6.5" (16.51 cm) d (Round) Midrange - Dynamic Balance Mica Reinforced Polypropylene |
| (1) 1" (2.54 cm) d (Round) Tweeter - Terylene High-Res Dome | (1) 5.25" (13.34 cm) d (Round) Midrange - Low distortion mica-reinforced polypropylene cones | (1) 1" (2.54 cm) d (Round) Tweeter - Terylene High-Res Dome | |
| Dimensions | 6.1"(D) X 5.4"(W) X 8.4"(H) | 10.2"(D) X 7.5"(W) X 12"(H) | 13.8"(D) X 8.5"(W) X 14.8"(H) |
| Recommended Amplifier Power | 20 - 100 Watts/Channel | 20 - 100 Watts/Channel | 20 - 125 Watts/Channel |
| Overall Frequency | 67 Hz - 40 kHz | 50 Hz - 40 kHz | 39 Hz - 40 kHz |
| Max Sensitivity (1 watt @ 1 meter) | 87 dB | 88 dB | 88 dB |