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


A pair of floor standing loudspeakers

Available Finishes:

Sound that astonishes the ear from speakers that seduce the eye.

Years ago, it didn't matter what speakers looked like as long as they sounded good. Admittedly, some of the best sounding speakers did not always blend perfectly into everyone's decor. Today, those of us who consider music an important part of our life and who demand the highest performance possible from our stereo components prefer that our loudspeakers reflect our lifestyle by complementing our taste in home furnishings. The new RTA 15TL, representing over 18 years of Polk's research and development, is already setting new standards of sonic excellence. And its elegant cabinet is a beautiful visual addition to any environment or listening room. It all begins with the remarkable SL 3000 Trilaminate Tweeter: Working with Johns Hopkins University Center for Non-Destructive Testing, Polk engineers utilized Laser Interferometry to test tweeter designs and materials. They found that ultimately, by vapor-depositing stainless steel and aluminum to a polyamide dome surface, an extended, very flat frequency response, out to 26 kHz, was achieved. Polk also discovered that by using a rare Ultra Low Viscosity Magnetic Fluid, nearly as thin as water, to cool the SL 3000's voice coil, power handling capacity and reliability would vastly increase. Indeed, the SL3000 tweeter can significantly exceed normal listening levels without loss of performance of reliability. The clear imaging of Polk's Line Source Array: By arranging its four 6.5" drivers in a vertical line source along with the SL3000 tweeter, superior imaging and midrange purity is achieved. This line source technology is the same advanced principal used in Polk's flagship "Signature Reference Series." By clearly focusing midrange frequencies and avoiding floor and ceiling reflections, Polk's Line Source delivers a wide open, natural sound without tonal coloration. Consequently, the RTA 15TL performs superbly in a wide variety of room sizes and placements. Controlling diffraction to create a lifelike stage: The grille of the RTA 15TL has been specially designed to eliminate mid and high frequency diffraction and to actually enhance dispersion. In fact, the RTA 15TL sounds better with the grille on than off. And to eliminate any possibility of phase anomalies and other colorations, Polk developed a unique "diffraction spoiler" which dramatically improves audible frequency response and imaging. By controlling diffraction, "smearing" of the sonic image and "peaky" characteristics are eliminated. Polk Bass: Deep, Powerful and Tight: Two independently tuned, 10 inch bass radiators, one facing front, one facing rear, deliver the impressive bass for which Polk is known. These two radiators move a significant amount of air and at the same time produce a more accurate reproduction of an instrument's timbre and transience than a single conventional woofer. This configuration provides the tight, well defined bass normally associated with small systems combined with the deep, powerful performance found in large systems. - excerpt from 1990 promotional information

Driver Complement

Diameter1" (2.54cm) 
TypePolk SL3000 dome tweeter 
Diameter6 1/2" (16.51cm) 
TypeTrilaminate polymer bass-midrange drivers 
Diameter10" (25.40cm) 
TypeSub-bass radiators, one high-resonance, one low-resonance 


Total Frequency Response20Hz - 26 kHz 
Upper -3dB Limit26 kHz
Lower -3dB Limit35 Hz
Nominal Impedance8 ohms
Efficiency90 dB
Recommended Amplifier Power30 - 250 watts per channel

Amplifier Specs

Amplifier Type


Cabinet Dimensions
Height43" (109.22cm) 
Width12 1/2" (31.75cm) 
Depth15 1/2" (39.37cm) 


Total Shipping Weight77.00 pounds

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.

RTA15TL Media

RTA15TL Literature

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