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


High Definition Surround Speakers

Available Finishes:

The Ultimate Surround Ambience

Timbre-matched to the LSi Series, for the most realistic, most seamless, surround sound performance possible.

Adjustable Surround Sound Design

Dual Ring Radiator Tweeters and two Aerated Polypropylene Drivers in a specially designed trapezoidal cabinet allow you to choose (via a convenient toggle switch) between Bipole and Dipole surround shaping. Use this speaker on the rear sides of your listening area (Bipole), or directly behind you (Dipole). Either way, you will be wrapped in a spectacularly believable ambient surround sound environment. Effects will embrace you, and you'll be in the center of the action. 

Dual Ring Radiator Tweeters

The ultra-high performance Ring Radiator Tweeter is found on ultra-high end, luxury-priced speakers. We've brought the Ring Radiator down to earth for your enjoyment. In the LSi Series, you will experience its precise accuracy, meticulous detail and extended, low distortion frequency response at a fraction of the price.

Dynamic Balance Aerated Polypropylene Drivers

Why does the LSi Series sound so warm and natural? It's what they're made of that matters. Aerated Polypropylene is stiff on the outside, for excellent transient response, but "light & chewy" on the inside, providing light mass with importrant damping qualities. Using our patented, laser-based Dynamic Balance process, we've eliminated areas of resonance on the cone in the planning stages, so bad sounds never make it to the final product. As a result, the LSi Series sounds like a Polk Audio loudspeaker should: realistic, transparent, wide and embracing, with no distortion even at lifelike volume levels.

Cast Aluminum Driver Baskets

Rigid Cast Aluminum Driver Baskets resist flexing and "ringing" for ultra-tight bass and coloration-free midrange.

Non-Resonant Braced Black Gloss Piano-Finish Enclosure

Superior workmanship is plainly evident in the furniture-grade piano finish of each LSi Series speaker. It's a loudspeaker that lives up to its reputation for classy presentation, and blends well with traditional or modern decor. Inside, the enlosure is extensively braced with heavy duty MDF and damped with professional damping material. No energy is lost in unwanted cabinet resonances, for smooth, untarnished reproduction of even the most extreme audio. Next time you meet them, give them The Knuckle Test (knock, knock!) and feel the solid, non-resonant build quality.

Dual PowerPort Bass Vents with Wall Mounts

Rear-firing, with heavy duty keyhole wall mount slots built in. Our patented PowerPort Bass Venting System smooths the big moving air turbulence at the mouth of the speaker's bass port, effectively enhancing deep, musical bass response and aiding over-all full-range blending between frequencies. Bass response in the LSi Series is efficient, precise, natural, unimpeded by distortion. This is lifelike bass you can feel all over. 

Premium Crossovers

High performance materials minimize the need for electronic manipulation of audio reproduction (that is, the LSi Series sounds great from the start), but we've designed a high performance crossover system to boost performance just that much more. Premium components, like Mylar Bypass Capacitors, extend and flatten responses, especially in the higher, detail-oriented frequencies. You will discover musical details you've never heard before, even in your favorite high performance digital audio.

Low Diffraction Grille Design

The unique open architecture design of the acoustically inert LSi Series speaker grille never gets in the way of the sound.

Gold-Plated 5-Way Binding Post Connectors

Gold-plated 5-way professional binding post connectors give you maximum signal transfer and the most secure professional connections.

Perfectly Matched to LCi In-Wall/In-Ceiling Speakers

Designed with the same high performance components, including the Ring Radiator Tweeter and  Aerated Polypropylene Drivers, the LCi Series of built-in loudspeakers can be used to complete or extend a traditional system of LSi Series loudspeakers. Add built-in surrounds to a home theater system, or add second-zone speakers to a music system. LCi Series built-in loudspeakers deliver the same incredibly warm and natural LSi sound in a speaker series that can virtually disappear into your decor.

Famous Polk Dependability & Durability

Like all of our products, the LSi Series uses only the best materials coupled with the most advanced manufacturing techniques on the planet. All Polk products must pass a battery of the most physically strenuous and exhaustive performance tests in the industry, including drop testing and extreme signal response testing. Polk Audio loudspeakers are proudly built to perform for a lifetime.

Polk Audio Customer Service: The Gold Standard

Call or email us and you'll be connected to real live human who knows just about everything there is to know about audio and performance electronics. From "how do I get started?" and "what should I buy?" to "how do I stop that hiss?" and "which tube needs replacing?" and everything in between, we know the answers you need to get back to enjoying your audio entertainment pronto. Just ask. 

Driver Complement

Diameter1" (2.54cm) 
TypeDynamic Balance Ring Radiator 
Mid / Woofer
Diameter5 1/4" (13.34cm) 
TypeDynamic Balance with aerated polypropylene cone, cast basket and rubber surround 


Total Frequency Response40Hz - 27kHz 
Upper -3dB Limit26 kHz
Lower -3dB Limit52 Hz
Nominal Impedance4 ohms
Efficiency88 dB
Radiation PatternSelectable bi-pole or di-pole 
Recommended Amplifier Power20 - 200 watts per channel
InputsDual gold plated 5-way binding posts for bi-amp/bi-wire hookup 

Amplifier Specs

220V AvailabilityNo 


Cabinet Dimensions
Height15" (38.10cm) 
Width13 1/4" (33.66cm) 
Depth10" (25.40cm) 
Mounting OptionsWall mount with built-in keyhole slots 
Product Weight (each)24.00 pounds


Unit of Measurepair 
Total Shipping Weight50.00 pounds
Included AccessoriesRubber bumper pads 


Speaker Warranty5 years parts and labor (original purchaser) 

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.

LSi F/X Media

LSi F/X Literature

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