Speaker protector and soft start circuit PCB for audio amplifiers. Connect up to three mains transformers and up to six speaker relays. When the mains switched on, the mains transformer is connected to the network through current limiting resistors. After a delay, the resistors shorted. After another delay (1.5s), the speakers connected to the outputs of the amplifier. The speaker relays are located off this board, next to the speaker connector, or on the amplifier board.