Galaxy Audio LA4PMB Line Array Speaker - BlackThe Galaxy Audio LA4PM Line Array is designed to take advantage of the unique sound dispersion characteristics of multiple stacked drivers. Line Arrays are becoming increasingly popular for both permanent installations and portable PA because of their ability to provide very targeted sound, even in acoustically challenging rooms. The LA4PM line array speaker system model includes a 70volt transformer with screw terminal taps at 100w, 50w, 25w, 12. 5w,