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


Three-way floor-standing loudspeaker

Available Finishes:
Additional Images

Real Wood, Real High Performance

Because our speaker cabinets are built in state-of-the-art computer-controlled woodshops, we control the process from drawing to construction, building in the utmost in quality control to own exacting specifications. Complete control gives us the ability to offer real wood and superior performance at reasonable prices -- prices the competition usually charges for... Vinyl. (Given the choice between vinyl and real wood, which would you pick?)

The RTi150 features:

  • Real wood cabinets.
  • Your choice of two real wood finishes: Cherry or Black Oak veneers.
  • Three 6.5" woofers combine the large surface area benefit of a single large woofer (100 sq. inches) with that of small woofers - a high force to mass ratio - for tighter, punchier, more accurate bass response.
  • Polymer-composite Dynamic Balance drivers with butyl rubber surrounds for durability and smooth wide range response.
  • 1" silk/polymer composite dome tweeters for clear, detailed highs.
  • Mylar bypass capacitors in the crossover extend high frquency response and improve detail and transparency.
  • Slim tower design conserves floor space, occupies only about 1 square foot!
  • Anti-diffraction grille and narrow baffle with raised driver bezel to minimize grille diffraction for spacious, 3-dimensional imaging.
  • Floor-coupled Power Port bass venting for clean, low distortion bass you can really feel.
  • Magnetic shielding for safe placement near video sources.
  • Adjustable leveling feet and carpet spikes included to provide stability on any type of flooring.
  • Dual, bi-ampable gold-plated 5-way binding post inputs (with wide holes for large-gauge bare wire connections) for the most secure connections and the most versatile wiring applications.

Driver Complement

Diameter1" (2.54cm) 
TypeSilk/Polymer composite dome - shielded 
Diameter6 1/2" (16.51cm) 
TypeDynamic Balance Polymer composite driver - shielded 
Diameter6 1/2" (16.51cm) 
TypeLong-throw Polymer cone woofers - shielded 


Total Frequency Response20 Hz - 27kHz 
Upper -3dB Limit26 kHz
Lower -3dB Limit26 Hz
Nominal Impedance8 ohms
Efficiency91 dB
Mid-High Array Crossover2.1kHz 2nd order HP & LP 
Subwoofer Crossover85Hz between driver and subs, 1st order HP/2nd order LP 
Recommended Amplifier Power50 - 500  watts per channel
InputsDual (bi-amp) gold plated 5 -way binding posts  

Amplifier Specs

Amplifier Type


Cabinet Dimensions
Height48" (121.92cm) 
Width8 1/4" (20.96cm) 
Depth14 7/8" (37.78cm) 
Enclosure Type
Mid-High Array Enclosure TypeSealed and isolated from woofer enclosure 
Subwoofer Enclosure TypeVented via floor-coupled Power Port 
Width9" (22.86cm) 
Depth16 5/16" (41.43cm) 


Unit of Measureea. 
Total Shipping Weight81.00 pounds
Included AccessoriesCarpet spikes and rubber feet 


Speaker Warranty5 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.

RTi150 Media

RTi150 Literature

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RTi150 Accessories