Polk Audio Atrium 8 SDI Outdoor Speaker All-Weather Stereo 6.5"

The Polk Audio Atrium 8 SDI High Performance All-Weather Outdoor Loudspeaker delivers exceptional sound quality, flexible installation options, and true durability for outdoor audio systems designed to perform year after year.

Built with a powerful 6.5" dual voice coil mid-woofer, the Atrium 8 SDI produces rich, tight bass that cuts through open-air environments without losing clarity or punch. Its dual 1" aluminum dome tweeters generate wide dispersion and crisp high-end frequencies, ensuring full-range fidelity across patios, decks, gardens, pool areas, and commercial spaces.

With its Single/Dual Input Switch, the Atrium 8 SDI functions as either a full-range stereo speaker or dedicated left/right channel — offering installation flexibility whether used individually, in pairs, or across multi-zone setups.

Polk’s proprietary Power Port® bass venting system enhances low-end extension while minimizing turbulence and distortion, delivering impactful, well-defined bass even at higher volumes.

Built for harsh outdoor conditions, the Atrium 8 SDI is all-weather certified to resist UV rays, salt-fog, rain, snow, and extreme temperature swings, while its rustproof aluminum grille and rugged cabinet ensure long-lasting performance.

Installation is fast and secure thanks to the Speed-Lock™ mounting system, which allows both horizontal or vertical mounting to fit any outdoor architecture or design aesthetic.

Whether used for casual outdoor gatherings or full-scale outdoor entertainment systems, the Atrium 8 SDI delivers high-powered, audiophile-level sound that transforms your outdoor space into an immersive listening environment.

6.5" dual voice coil Dynamic Balance driver delivers powerful, deep outdoor bass
Dual 1" aluminum dome tweeters provide crisp high-frequency clarity across wide spaces
Frequency response of 45Hz–27kHz ensures full-range sound with extended highs and lows
Single/Dual Input switch allows stereo sound from one speaker or dedicated L/R pairing
Polk Power Port® technology enhances bass output while minimizing distortion
8 Ohm impedance ensures efficient power handling with most amplifiers
All-weather certified for UV, rain, salt-fog, and extreme temperature durability
Rugged enclosure with rustproof aluminum grille for long-term outdoor resilience
Horizontal or vertical mounting flexibility for custom installation options
Speed-Lock™ mounting bracket system ensures secure and easy wall or eave installation
Sold as a single speaker for flexible stereo or multi-zone audio setups