The thumping heart of your outdoor PA system. The RTN-55XT is a robust 55-Watt driver unit designed to thread directly onto Rotania aluminum horn flares. It features a built-in 100V line matching transformer with easy-to-select tappings, allowing you to instantly adjust its output volume. Engineered to reproduce the human voice with exceptional clarity (160-7000Hz), it is the ultimate tool for municipal announcements and crowd control.