• The Atrium Loudspeaker produces high fidelity sound quality anywhere you want.
• Improved baffle design allowing broader coverage.
• Polk Audio all weather certified.
• Exceeds baseline industrial and specifications for environmental endurance.
• Durable weatherproof finish which is paintable.

Manufacturer's Description -------------------------- The new Atrium Series offers five new models, with sonic improvements specifically engineered for better outdoor performance. In fact, our engineering and industrial design teams spent months looking at any and every detail that could make these new Atriums perform better, faster and be even more reliable. When you set out to improve a loudspeaker with the pedigree of the Atrium Series, every detail counts. The ship of the line, the Atrium8sdi has a unique, patented* Single/Dual Input Switch that combined with its ingenious dual tweeter array enables you to use the Atrium8sdi as either a single high performance stereo loudspeaker, or the left-or-right speaker in a high performance stereo pair. And you can use it practically anywhere, because the Atrium8sdi also has special spec waterproofing features, including our patented water-resistant PowerPort bass venting. For easy, safe one-handed installations even in difficult locations. The greatly simplified ing procedure means fewer parts to "juggle." Simply the bracket and click the speaker into place. it and tighten it down, and fini! Outdoor convenience, indoor sound quality! New bracket also has a 45-degree down angle. Why adjust a speaker to a 45-degree angle, when we can design a ing bracket that lets you install the speaker at that angle permanently? It's another feature of Atrium's new ing system and a simple, elegant solution. Dynamic Balance -A Polk perfected method of analyzing a speaker's microscopic behavior with laser Interferometry. Polk engineers can tune out unwanted resonance and distortion with the right combination of materials, geometry and construction techniques. This brings you pure, distortion-free sound. PowerPort technology allows Polk Audio speakers to deliver more deep, musical bass than you'd expect from a moderately-sized (and moderately-priced) loudspeaker. It's the kind of realistic bass that reaches out and grabs you, shakes your behind on the seat, and adds true depth and visceral emotional power to your music and movie experiences. By using a state-of-the-art Klippel Distortion Analyzer, Polk engineers were able to optimize the woofer's motor structure, voice coil alignment and suspension bringing you the best possible performance even at extreme listening levels. Click here for a technical explanation.