Polk Audio Atrium4 All-Weather Indoor/Outdoor Speakers


Polk Audio Atrium4 Overview

Enjoy your favorite music, podcasts, and other audio indoors or out with your amp and this pair of white Polk Audio Atrium4 All-Weather Indoor/Outdoor Speakers. They can output up to 80W of continuous audio and are designed to withstand salt-fog, water, and more. They include a mounting bracket and hardware and can be mounted either horizontally or vertically. The grille is paintable to help the speakers match your décor.

Dynamic Balance

The driver and tweeter are made using materials designed to minimize artifacting to provide more realistic sound reproduction at high and low volumes.

180° Speed Lock Mounting System

Just mount the bracket, click the speaker into place, aim it, and tighten it.

All-Weather Rating

  • ASTM D5894-UV Salt Fog
  • MIL-STD-810 Immersion
  • MIL-STD-883 Method 1009.8 for salt and corrosion

Additional Features

  • Suitable for indoor or outdoor use
  • Horizontal or vertical installation
  • Mineral-filled Dynamic Balance polymer cone mid-woofer with rubber surround
  • Anodized aluminum tweeter with rubber surround and neodymium motor structure
  • Mineral-filled polypropylene cabinet
  • Powder-coated aluminum grille & bracket


Polk Audio Atrium4 Specs

Speaker System
Speaker Configuration 2-Way
Recommended Amplifier Power 10 to 80 W RMS per Channel
Bi-Amp Capability None
Drivers 1 x 4.5″ / 114.3 mm Polymer Cone Mid-Woofer (per Speaker)
1 x 0.75″ / 19.05 mm Anodized Aluminum Dome Tweeter (per Speaker)
Enclosure Type Sealed
Ports None
Frequency Response 75 Hz to 25 kHz
Impedance 8 Ohms
Wired Connectivity 1 x 5-Way Binding Post Pair Input
Sensitivity 89 dB
Placement & Mounting Options Tabletop/Bookshelf
Wall-Mount (with Included Hardware)
Cabinet Material Polypropylene
Grille Perforated Aluminum
Dimensions 5.7 x 8.6 x 6.7″ / 14.4 x 21.9 x 17 cm (with Mount)
Weight 3.6 lb / 1.6 kg (Each)


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