The Audio Power Amplifier shall be a fully transistors type, convection cooled and provided with an integrated output transformer designed for constant voltage system. It shall deliver power of up to 350W/650W/1000Wrms at 100V with solid-state DC fuse protection. It shall operate main supply of 240Vac, as well as 24Vdc emergency battery supplies. It shall have 1 input with adjustable gain and muting level. The input signals level shall be 0dB and balanced.