The Pro Series rock speaker uses the same high performance acoustic design philosophies of our legendary indoor products, bringing the world’s most dynamic, powerful, detailed sound to your outdoor living space. From small residential systems to massive commercial installs, the Klipsch Pro Series rock speakers are designed to make any installation job quick and easy. For distributed line application, the Pro Series rock speakers feature a 70V/100V multi-tap transformer with 8-ohm bypass, allowing for exceptional balance at any listening location - all selectable from an easily accessible, tool-free rotary switch on the back of the speaker.