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

Atrium 45p

Self-amplified multi-application loudspeaker, for indoor use only.

Available Finishes:
Additional Images

The Speaker for All Seasons

Atrium 45p:

  • Front panel volume control allows you to set volume in a remote location without the need for an IR repeater or other fancy, pain in the neck device
  • Built-in bracket allows multiple mounting options and full 90 degree rotation: aim them to deliver the best possible sound in a variety of locations
  • Speaker level and line level inputs allow easy hook up to any kind of electronics
  • 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 room color
  • Gold plated 5-way binding post speaker-level inputs
  • 4.5" (11.4cm) long-throw Polymer cone driver with butyl rubber suspension pumps out amazing bass response
  • 3/4" (19mm) dome tweeter with neodymium magnet broadly distributes high frequencies to cover a large area with high fidelity sound
  • Available in 120V only

Driver Complement

Diameter3/4" (1.91cm) 
TypeSoft dome with Neodymium magnet 
Mid / Woofer
Diameter4 1/2" (11.43cm) 
TypeDynamic Balance, mineral filled Polymer with rubber surround 


Total Frequency Response60Hz - 20kHz 
Recommended Amplifier Powern/a watts per channel
Inputs5-way binding post speaker-level inputs and coaxial (RCA) line level inputs 
Outputs5-way binding post speaker-level output to passive 

Amplifier Specs

Continuous Average Output
Amplifier TypeBuilt-in Power 


Cabinet Dimensions
Height9 1/2" (24.13cm) 
Width6 1/4" (15.88cm) 
Depth7 5/8" (19.37cm) 
Mounting Options90 degree swivel bracket supplied 


Unit of Measuresystem 
Total Shipping Weight34.00 pounds
Included Accessories90 degree swivel wall mount bracket 


Speaker Warranty5 years parts and labor (original purchaser) 
Subwoofer Amplifier Warranty3 Years Parts and Labor, limited 

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 45p Media

Atrium 45p Literature

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Atrium 45p Accessories