Atrium®6 really turns up the performance with true high fidelity sound quality anywhere you can run a cable. PowerPort® bass venting and Dynamic Balance® driver technologies, both Polk exclusives, produce the kind of sonic performance you’d expect from an indoor system. The Atrium6 is a workhorse when it comes to filling large spaces with the kind of big, lifelike high quality sound for all your outdoor entertaining. Like all our outdoor models, the Atrium60 is built to withstand the elements, which means you’ll be enjoying great performance for years to come. 13.34cm long-throw aerated polypropylene cone driver with butyl rubber surround pumps out surprising bass response from a compact design. 1-inch (25.4mm) anodized aluminum dome tweeter with rubber surround and neodymium magnet for better power handling and smoother response. Patented water-resistant PowerPort bass venting efficiently adds 3dB of big, realistic, musical bass output. No other outdoor speakers can touch the Atrium Series for deep bass you can feel from the ground up. And because it’s Polk all-weather certified water-resistant, it can go practically anywhere with no worries about moisture impeding its performance. Broad coverage baffle design, adapted and applied from our current Atrium design but with subtle improvements in the new Atrium Series. A more steeply-angled baffle design that maximizes critical mid- and high-frequency dispersion over a large area, without sacrificing the detail. Durable, mineral-filled polypropylene cabinet design, with molded-in bracing, sounds like a real speaker (not an outdoor speaker), and survives years of seasonal changes, for truly great sound, no matter what the weather. Patented Dynamic Balance and Klippel optimization technologies ensure the perfect material performance, eliminating driver and tweeter artifacts for more realistic sound reproduction at high and low volume levels. Aluminum grilles and bracket, with stainless steel and brass hardware, no rust ever. Gold-plated 5-way binding posts for the most secure, efficient hookups. Available in durable, weatherproof black or white paintable finishes.