Atrium4

The compact Atrium 4 loudspeaker produces high fidelity sound quality anywhere you want great sound
It's small size makes it ideal for tight, out-of-way installations. By the pool, around the kitchen, on the Deck or filling the backyard with great sound
Atrium4 is built rugged to deliver years of great performance fall, winter, spring and summer

4 1/2-inch (11.43cm) long-throw mineral-filled polypropylene cone driver with butyl rubber surround pumps out surprising bass response from a compact design
3/4-inch (19mm) anodized aluminum dome tweeter with neodymium magnet for better power handling and smoother response

Broad coverage baffle design, adapted and applied from our current Atrium design but with subtle improvements in the new Atrium Series

Polk all-weather certified, Atrium Series speakers exceed baseline industrial and military specifications for environmental endurance. Certification means Atrium speakers can effortlessly withstand the worst Mother Nature can dish out, whether its extreme temps or heavy rains
With certification like this, your kitchen or bathroom installation is a cakewalk for Polk all-weather speakers

Easy installation which lets you mount on the Ceiling , Wall or Corner Mount
Speed-Lock™ mounting system, for easy, safe one-handed installations even in difficult locations. The greatly simplified mounting procedure means fewer parts to "juggle." Simply mount the bracket and click the speaker into place. Aim it and tighten it down, and fini! Outdoor convenience, indoor sound quality!

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.

Aluminum grilles and bracket, with stainless steel and brass hardware so No rust, ever

Gold plated 5-way binding posts

For specs go to :
http://www.polkaudio.co.nz/collections/outdoor/products/atrium-4-outdoor-speakers