The AT Series engineered landscape speakers feature a coaxially mounted 0.75" aluminum dome tweeter design over a proprietary high-excursion 3" woofer. Constructed of aircraft aluminum dual enclosure, aluminum perforated grill, woofer features an aluminum cone and Santoprene™ surround, severe powder coat finishes to withstand harsh outdoor environments. Available in both 4-ohm or 70V (low loss, 30W toroidal transformer) with built-in crossover network, allowing these outdoor speakers to play at higher volumes while still maintaining a smooth frequency response of 100-20kHz.