The AT Series, engineered landscape speakers now feature a coaxially mounted 0.75" aluminum dome tweeter design over a proprietary high-excursion 4" woofer. James Loudspeakers' All-Terrain speakers now come with a built-in crossover network and low-loss, allowing these outdoor speakers to play at higher volumes while still maintaining a smooth frequency response of 100-20kHz. The woofer features an aluminum cone and Santoprene™ surround to withstand harsh outdoor environments. The AT42-4 is constructed of aircraft aluminum and includes an aluminum perforated grille to provide years of trouble-free use.