AT Series engineered landscape speakers now feature a coaxially mounted 0.75" aluminum dome tweeter design over a proprietary high-excursion 4" woofer. Constructed of aircraft aluminum dual enclosure, aluminum perforated grill, woofer features an aluminum cone and Santoprene™ surround, severe powder coat finish to withstand harsh outdoor environments. Available in 4 Ohm or 70 volts (low loss, 50W toroidal transformer) with built-in crossover network, allowing these outdoor speakers to play at higher volumes while still maintaining a smooth frequency response of 80-20kHz.