Polk Audio Atrium 4 Compact All-Weather Outdoor Speaker
The Polk Audio Atrium 4 is a discreet, high-quality outdoor speaker designed for smaller spaces where durability and sound clarity matter equally. Compact in size but engineered for performance, it delivers balanced audio for patios, balconies, garden walls, and exterior areas that require a subtle visual presence.
Built to perform year-round, the Atrium 4 is ideal for installations fully exposed to the elements.
Durable Construction for Outdoor Environments
The speaker housing is formed from mineral-filled polypropylene, providing excellent strength while keeping overall weight low. A coated aluminium grille protects the drivers and prevents corrosion, ensuring long-term reliability without rusting or material fatigue.
This rugged construction allows the Atrium 4 to operate confidently outdoors without the need for overhead shelter.
Compact Design with Powerful Sound
Despite its smaller footprint, the Atrium 4 incorporates Polk PowerPort® technology, which enhances airflow from the cabinet into the listening area. This results in deeper, more controlled bass while reducing distortion and turbulence—delivering a fuller sound than typically expected from a compact outdoor speaker.
Its discreet size allows it to blend seamlessly into outdoor spaces without drawing visual attention.
Simple Installation and Adjustable Mounting
The Atrium 4 includes a dedicated mounting bracket and fixings, making installation straightforward. Polk’s Speed Lock mounting system with keyhole slots allows quick placement and secure positioning.
Once installed, the speaker can be angled up to 45 degrees in either direction, enabling precise sound targeting. It can also be mounted vertically or horizontally, offering flexibility across a wide range of locations.
Built to Withstand Extreme Weather
Constructed using military-grade components, the Atrium 4 is designed for demanding outdoor conditions, including:
. Extreme heat and cold
. Heavy rainfall and humidity
. UV exposure
. Fog and salt-fog environments
This makes it suitable for coastal areas and fully exposed installations where many outdoor speakers struggle to survive.
Blends Seamlessly into Any Setting
Available in black or white, the Atrium 4 is designed to complement a wide range of architectural styles. Its compact profile makes it an excellent choice where minimal visual impact is important.
Ideal Applications
The Polk Audio Atrium 4 is well suited for:
. Small patios and balconies
. Garden walls and fencing
. Exterior walls
. Courtyards
. Covered or fully exposed outdoor areas
. Subtle background music systems
Key Features
. Compact all-weather outdoor speaker
. Mineral-filled polypropylene enclosure
. Rust-resistant coated aluminium grille
. PowerPort® technology for extended bass response
. Speed Lock mounting system for easy installation
. Adjustable bracket with up to 45° positioning
. Vertical or horizontal mounting options
. UV-protected finish
. Available in black or white
. Backed by a 5-year Polk Audio warranty
Why Choose the Polk Audio Atrium 4?
The Polk Audio Atrium 4 is ideal for users who want dependable outdoor sound in a compact, unobtrusive design. With robust weather protection, flexible mounting, and enhanced bass performance, it delivers consistent audio quality in outdoor spaces where size and durability are equally important.
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