Audio system, audio amplifier, and gain adjustment method for audio amplifier

摘要

Problem to be solved: to provide a speaker system having low impedance setting, a low impedance type audio system capable of outputting audio information of a sound pressure level corresponding to the number of audio amplifiers, an audio amplifier A gain adjustment method of an audio amplifier is provided.The audio system comprises a plurality of audio amplifiers connected to a speaker apparatus in parallel with a speaker system of low impedance setting.Audio AmplifiersGain set value storage unit for storing gain set value andA signal processing unit which performs signal processing using the gain set value to the input speech signal andAmplifier for amplifying the audio signalThe number of audio amplifiers connected to the speaker apparatus is calculated based on the output current value of the deviceThe value that can be added to the gain set value stored based on the calculated number is identified.A gain setting value updating section for adding a specific value to a stored gain set value is provided.Diagram