Polk Audio Atrium 4

Outdoor Speakers with 4.5" Drivers

Big Fidelity, Small Speaker. The Compact Atrium4 loudspeaker produces high fidelity sound quality anywhere you want great sound. Its small size makes it ideal for tight, out-of-way installations.

• All-Weather certified
• 4.5" Dynamic Balance® polypropylene woofers
• 3/4" Anodized Aluminum Dome tweeter
• Speed-Lock Mounting system

Big sound. Compact size.

The Polk Atrium 4 delivers crisp, powerful sound in a compact, weather-resistant design perfect for patios, decks, and outdoor spaces. Engineered for durability and rich audio performance, it brings your favorite music to life rain or shine.

Patented Dynamic Balance®

The perfect material performance, eliminating driver and tweeter "artifacts" for more realistic sound reproduction at high and low volume levels. To install, simply mount the bracket and click the speaker into place then aim it and tighten it down.

Speed Lock Mounting System

Simply mount the bracket and click the speaker into place, Aim it and tighten it down.

Outdoor speaker family

Incorporate multiple Atrium speakers together to create the ultimate outdoor speaker system.

The Atrium speaker family

For the ultimate outdoor sound system, combine multiple Atrium models to create a fully immersive listening experience with balanced coverage across large spaces. Whether you're hosting a backyard gathering or enjoying a quiet evening outside, the Atrium series offers the performance and flexibility to elevate every moment.