This product is a vintage Polk model and is not available for sale, but it may still be available in some stores as a closeout or used product. The following text is taken from the original sales brochure for this product and does not reflect current availability. If you happen to have any question or concerns about this product, or any other Polk Audio product, feel free to contact our Customer Service Department at 1-800-377-7655 Monday - Friday, 9am - 5:30pm EST


Our best bookshelf speaker.

Available Finishes:
Additional Images

There are no downloads available. If you need assistance, please contact us.

Real wood. Real high performance.

If you always thought that a bookshelf speaker had to be boxy-sounding and lightweight, you owe it to yourself (and your ears) to check out the RT55i in the flesh. Nothing lightweight here. Its three-driver cabinet -- available in three new real wood finishes to complement today's most prestigious naturally-finished stands and AV furniture -- delivers smooth response, incredible detail and three-dimensional imaging. No matter what you're listening to, Beethoven the composer or Beethoven the canine movie; when it comes to bookshelf speakers, the RT55i is a true high-end performer.

The RT55i features:

  • Superior home theater and music performance
  • High efficiency for great performance even with low power receivers
  • Exceptional bass response, provided by a rear-firing Power Port venting system built into the speaker's back plate
  • Composite Dynamic Balance® driver cones for wide response and low distortion
  • Dynamic Balance Tri-Laminate tweeter technology, with vapor deposited micro-layers of stainless steel and aluminum for clear, detailed highs
  • Anti-diffraction bezel and grille system minimizes grille-edge reflections for more open, spacious, lifelike imaging
  • Available in three natural wood finishes, each standard at no extra cost: Maple, Cherry and Black Oak
  • Smooth, natural midrange reproduction thanks to patented Acoustic Resonance Control technology
  • Magnetically shielded for safe placement next to your TV without picture interference
  • Dual (bi-ampable) gold-plated 5-way binding post inputs for the most secure wire connections

Real Wood at Vinyl prices - The first thing you'll notice about the RTiSeries is their luxurious real wood finishes: beautiful light Maple, inviting Cherry, and serious Black Oak (the RT15i, our small bookshelf speaker, is also available in white). What will really surprise you, though, is that you won't pay a premium for these distinctive real wood finishes. Because of our in-house, computer controlled woodworking factory we can offer these rich finishes at prices you'd normally pay for vinyl.

After the look, there's the sound. The RTiSeries Bookshelf Speakers pack the same unique Polk technologies found in Polk tower speakers -- like Dynamic Balance drivers and exclusive rear-firing Power Ports -- into stylish smaller packages. The RT55i, RT35i, RT25iand RT15iare bookshelf speaker systems boasting the sonic attributes of the best and costliest examples of the genre: superior linearity, definition and imaging... at a price well within your reach. The bookshelf RTiSeries produce bass that's rich, deep and satisfying - far beyond that of bookshelf speakers costing upwards of twice their price.

The RTibookshelf models are intensely musical, presenting a large soundstage without sacrificing pinpoint localization, and are so transparent that they allow you to focus on the entertainment values of the performance without thinking about the speakers from which the performance is emanating. RTiBookshelf Speakers are superb music listening speakers. At the same time, they possess the wide dynamic range necessary to make them great choices for home theater systems, particularly when teamed with a powered subwoofer.

Pick up a Polk bookshelf speaker (go ahead, pick it up!), then pick up a similarly-sized bookshelf speaker from another manufacturer. You'll immediately notice that the Polk speaker is heavier, more solidly built, and sports a superior fit and finish. Now compare the sound -- Go ahead, we said COMPARE! We're sure you'll choose the Polk.

Driver Complement

Diameter1" (2.54cm) 
TypeDynamic Balance® Tri-laminate, shielded 
Mid / Woofer
Diameter6 1/2" (16.51cm) 
TypeDynamic Balance® drivers, shielded 


Total Frequency Response35Hz - 26kHz 
Upper -3dB Limit25 kHz
Lower -3dB Limit47 Hz
Nominal Impedance8 ohms
Efficiency91 dB
Recommended Amplifier Power20 - 200 watts per channel
InputsDual (bi-amp/bi-wire) gold-plated 5-way binding posts 

Amplifier Specs

Amplifier Type


Cabinet Dimensions
Height21 1/8" (53.66cm) 
Width9 1/2" (24.13cm) 
Depth14 3/8" (36.51cm) 


Unit of Measurepair 
Total Shipping Weight76.00 pounds


Speaker WarrantyLimited, 5 years parts and labor 

Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655 (USA and Canada). Outside of North America call +1 (410) 358-3600.

RT55i Media

RT55i Literature

Want to know more? Want to dig just a little deeper to learn about this product? Here's a list of source material that will give more detail, other perspectives, and answer questions you may have.

RT55i Accessories