BOSCH LBB1938/30 Power Amplifier (1x480W)

BOSCH LBB1938/30 Power Amplifier (1x480W), Engineered for demanding public address, voice alarm, and emergency evacuation applications, the BOSCH LBB1938/30 delivers reliable $480\text{ W}$ RMS ($720\text{ W}$ maximum) audio performance. It includes extensive internal protection against overload, short circuits, and overheating, complemented by a temperature-controlled cooling fan to keep acoustic noise low during idle or normal operation.

For emergency and life safety deployment, the unit monitors critical operational functions—including mains supply, battery backup, pilot-tone presence, and internal amplifier operation—with status indicated by front-panel LEDs and reported via failsafe, normally energized supervision relays. Dual balanced line inputs with loop-through connections allow simplified system daisy-chaining and priority signal routing, while a dedicated $100\text{ V}$ line input enables slave operation to expand power output on existing loudspeaker networks.