Big Fidelity, Small Speaker
The compact Atrium4 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, tucked
away in the family den or filling the backyard with great sound. Like
our bigger Atriums, the 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. You want to fill a large open outdoor space with big, full-range
sound. The new Atrium Series has a more steeply-angled baffle design
that maximizes critical mid- and high-frequency dispersion over a large
area, without sacrificing the detail.
Polk all-weather certified, Atrium Series speakers exceed
baseline industrial and military specifications for environmental
endurance (ASTM D5894-UV Salt Fog, Mil Standard 810 Immersion, Mil-Std
883 Method 1009.8 for salt and corrosion.) 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.
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.
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, dependable hookups.
Available in durable, weatherproof black or white paintable finishes. 
