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


Multi-application all-weather speaker.

Available Finishes:
Additional Images

A Great Speaker for the Great Outdoors

The rugged Atrium55 meets or exceeds stringent industry and military specifications for full exposure to the elements for years of reliable high performance sound anywhere in and around your home.

Atrium55 Features:

All hardware is either stainless steel or brass 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 them to deliver the best possible sound in a variety of locations

Rustproof aluminum grille has 55% open area for superior sound quality

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

Available in either black or white

White version may be painted to match any house or trim color or paint them green to blend in with your foliage

5 1/4-inch (13.3cm) long throw polymer cone driver with butyl rubber suspension pumps out amazing bass response

1-inch (25mm) dome tweeter with neodymium magnet broadly distributes high frequencies to cover a large area with high fidelity sound

All Polk Audio 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 Audio loudspeakers are built to perform for a lifetime.

Driver Complement

Diameter1" (2.54cm) 
TypeSoft dome with Neodymium magnet 
Mid / Woofer
Diameter5 1/4" (13.34cm) 
TypeDynamic Balance, mineral filled Polymer with rubber surround 


Total Frequency Response60Hz - 20kHz 
Nominal Impedance8 ohms
Efficiency90 dB
Recommended Amplifier Power10 -100 watts per channel
InputsGold-plated 5-way binding posts 

Amplifier Specs

Amplifier Type


Cabinet Dimensions
Height10 3/4" (27.30cm) 
Width7 1/2" (19.05cm) 
Depth9 3/8" (23.81cm) 
Mounting Options90 degree swivel bracket supplied 
Product Weight (each)7.00 pounds


Unit of MeasurePair 
Total Shipping Weight16.00 pounds
Included AccessoriesWall mount bracket 


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.

Atrium 55 Media

Atrium 55 Literature

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Atrium55 Accessories