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


All-weather dual/single input outdoor Loudspeaker

7 11/16" W x 13 1/2" H x 9 5/16" D
19.53cm W x 34.29cm H x 23.65cm D

Available Finishes:
Additional Images

The Speaker for All Seasons.

The Atrium65SDI has a unique, patented* dual input/single input switch. Combined with its ingenious dual tweeter array, this switch allows the Atrium65SDI to be used either as a single high performance stereo loudspeaker, or the left-or-right speaker in a high performance stereo pair. And you can use it practically anywhere, because the Atrium65SDI also has special military spec waterproofing features, including a patented** waterproof PowerPort® bass vent.

Atrium65SDI Features:

The Atrium65SDI is packaged one to a carton and priced as each.

Unique dual input/single input feature: A rear mounted switch allows the Atrium65SDI to operate as a single, dual-input speaker for stereo applications, or a traditional single-input speaker for left or right use.

6 1/2-inch (16.5cm) long throw polymer cone driver with butyl rubber suspension for superior bass and midrange response.

Dual voice coil driver for stereo play.

Two 1-inch (25mm) dome tweeters with neodymium magnets for accurate high frequencies.

Dual tweeter array with stereo tweeter aiming for excellent imaging whether used as a single stereo speaker, or as half of a stereo pair.

PowerPort® bass venting delivers high efficiency and extraordinary bass response in a modest cabinet size. This specially designed PowerPort includes a bugscreen protector for nominal waterproofing and for keeping critters out of the cabinet.

Stainless steel and brass hardware for years of rustproof reliability.

Meets or exceeds ASTM D5894-UV Salt Fog, Mil standard 810 Immersion and Mil standard 883 Method 1009.8 for salt and corrosion tests.***

Rustproof aluminum bracket allows multiple mounting options and full 90° rotation: aim the Atrium65SDI to deliver the best possible sound in a variety of locations, either as a stereo loudspeaker or as half of a stereo pair.

Rustproof aluminum grille with 55% open area for superior sound quality.

Sculpted front baffle and rounded enclosure minimize diffraction (sound reflections off of hard edges) for more open and lifelike imaging.

Available in either black or paintable white finishes to match any decor inside or out.

The Atrium65SDI has a patented* dual crossover network that is enabled or disengaged via the simple switch located over the binding post connectors. It sums the complete stereo signal (left and right) or the single left or right signal and mixes the signal to the appropriate tweeter or tweeters for the best performance, smoothest blending and most detailed imaging of any multi-application speaker.

For single speaker stereo performance where a pair of speakers is inconvenient, or as a pair of speakers where high performance, weather-resistant speakers are needed, listen to the Atrium65SDI.

All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.

* U.S. Patent # 7043034
** U.S. Patent # 7039212
*** With supplied Port Plug installed. Use the product with PowerPort venting in sheltered locations for best bass response. Install the Port Plug when the product is fully exposed to water.

Driver Complement

Diameter1" (2.54cm) 
TypeMetalized dome tweeters with Neodymium magnets 
Mid / Woofer
Diameter6 1/2" (16.51cm) 
TypeMineral Composite Polyproplyene cone with Butyl Rubber surround 


Total Frequency Response50Hz - 20kHz 
Nominal Impedance8 Ohm outputs in single ro dual mode ohms
Efficiency90 dB
Recommended Amplifier Power10 - 125 watts per channel
InputsPatented single/dual input switch and 2 sets (L&R) Gold-plated 5-way binding posts 

Amplifier Specs

Amplifier Type


Cabinet Dimensions
Height13 1/2" (34.29cm) 
Width7 11/16" (19.53cm) 
Depth9 5/16" (23.65cm) 
Mounting Options0n-wall with supplied bracket 
Product Weight (each)12.00 pounds


Unit of Measureeach 
Total Shipping Weight13.00 pounds
Included AccessoriesSwivel wall bracket, Port plug 


Speaker Warranty2 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.

Atrium65 SDI Media

Atrium65SDI Accessories