Polk Audio Atrium 4 Weatherproof Outdoor Speakers – All-Weather Durability & Broad Sound Coverage

Compact, Weatherproof Audio for Outdoor Living

The Polk Audio Atrium 4 is a pair of compact, wired outdoor speakers designed to bring indoor-quality sound outside. Each speaker houses a 4.5-inch dynamic balance polypropylene woofer paired with a ¾-inch anodized aluminum dome tweeter. This combination aims for deep, controlled bass and smooth high frequency response across outdoor spaces, whether you’re by the pool, on the patio, or in a sunlit sunroom. Polk’s Dynamic Balance and Klippel Optimization technologies help minimize driver and tweeter artifacts, so you experience a more natural voice and instrument detail at both quiet and lively listening levels.

Durable by Design

These all-weather speakers are built to brave seasonal shifts with rustproof aluminum grilles, rustproof aluminum brackets, and stainless steel/brass hardware. The rugged construction is paired with a compact footprint, making it easier to install in tight spots while still delivering room-filling sound over a broad area.

• Corrosion-resistant grille and bracket for long-lasting outdoor use
• Sturdy hardware to withstand temperature changes and rain
• Indoor-speaker quality sound in outdoor settings

Easy Setup, Flexible Placement

Setup is quick and straightforward thanks to Polk’s Speed Lock mounting system. The one-click bracket supports anti-slip, one-handed installation and can be oriented vertically or horizontally to suit different spaces. A gold-plated 5-way binding post connects easily to most modern AVRs or amplifiers, simplifying integration with existing home theater or outdoor audio systems.

• One-handed, secure installation for fast mounting
• Vertical or horizontal placement for versatile layouts
• Simple wiring with standard binding post connections

Where to Use Atrium 4

Ideal for outdoor entertainment zones like poolsides, patios, sunrooms, and backyards. Despite its compact size, the Atrium 4 is designed to deliver broad sound coverage, helping you hear a balanced mix of highs, mids, and bass wherever you set them up.

Note: While the Atrium 4 is engineered for outdoor use, performance can vary with distance from the listener and ambient noise. Benefits described here are possibilities based on the product’s design and features, not guarantees.