Description Bosch LBB 1938/20 480W Plena Power Amplifier Engineered for large-scale public address (PA) and voice alarm (VA) systems, the Bosch LBB 1938/20 Plena 480W Power Amplifier delivers continuous acoustic power for high-demand commercial and industrial installations. Built into a 3U 19-inch rack-mountable chassis and certified to EN 54-16 standards for evacuation compliance, it supports 70V, 100V, and 8-Ohm low-impedance audio lines. Designed for continuous operation in auditoriums, shopping malls, corporate towers, and factory complexes across Dhaka, Chittagong, and Sylhet, the unit offers dual priority-switched inputs, direct 100V slave amplification, and automated 24 VDC battery backup transition. System integrators and audio engineers evaluating the Bosch LBB 1938/20 price in Bangladesh rely on this unit for durable, multi ...