Unpowered/passive permanent mount line array speaker is designed for 70 volts systems. It features an internal 100 watts, 70 volts autoformer and screw terminal block on the back panel for selecting the proper wattage tap. Simply connect the common (-) line from the amplifier to the screw terminal labeled COM. Then connect the positive (+) line from the amplifier to the screw terminal corresponding to the desired wattage tap. 16 ohms tap is also provided to bypass the autoformer and connect directly to the speakers if desired. The LA4PM may be mounted to nearly any surface using an optional bracket or flown from cables using the various threaded T-nut locations on the cabinet. It is designed to take advantage of the unique sound dispersion characteristics of multiple stacked drivers.