Polk Audio

Atrium Series Speakers exceed baseline industrial and military specifications for environmental endurance.
Anodized aluminum tweeter domes with rubber surrounds are absolutely immune to the elements, offer better power handling and smooth response.
Tweeter phase cap smooths the frequency response from 12KHz up to 20kHz, the last audible octave.

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.)
Anodized Aluminum Tweeter Domes with Rubber Surrounds are absolutely immune to the elements, provide the smooth, broad high-end range you need for larger outdoor spaces
Newly designed tweeter phase cap smoothes the frequency response from 12KHz up to 20kHz, the last audible octave.

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.)
Anodized Aluminum Tweeter Domes with Rubber Surrounds are absolutely immune to the elements, provide the smooth, broad high-end range you need for larger outdoor spaces
Newly designed tweeter phase cap smoothes the frequency response from 12KHz up to 20kHz, the last audible octave.

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.)
Anodized Aluminum Tweeter Domes with Rubber Surrounds are absolutely immune to the elements, provide the smooth, broad high-end range you need for larger outdoor spaces
Dual Input/Single Input Switch. Combined with its ingenious Dual Tweeter Array, this switch enables the Atrium 8 to be used either as a single high-performance stereo loudspeaker, or the left-or-right speaker in a high performance stereo pair