| 摘要 |
The present invention relates to a multi-control audio system comprising a terminal by area, a multi-channel preamplifier, a main control unit, multiple power amplifiers, and an automatic path selector. The multi-control audio system can be simultaneously used in multiple areas, and can be used in multiple areas with a small number of power amplifiers by being formed to be automatically switched by power amplifiers in an idle state. The multi-control audio system can suppress howling by controlling a speaker capable of creating howling sound when multiple microphones are used, and can be automatically switched to available equipment in malfunction, and also transmit emergency broadcasts in emergency such as a fire. The multi-control audio system comprises: multiple terminals by area, installed by corresponding to each area and having multiple microphone/line level input units, for receiving audio signals from multiple microphones; the multi-channel preamplifier for amplifying the audio signals received from the microphones of the terminals by area; the main control unit, including a path control unit, for connecting the audio signals inputted from the preamplifier to a fixed power amplifier through a fixed path; multiple power amplifiers, automatically selected to form a pair with a terminal by area, for amplifying the audio signals outputted from the main control unit; and an automatic selector for switching to another power amplifier in an idle state by inspecting a current power amplifier, if the current power amplifier has a problem. |
