| 摘要 |
PROBLEM TO BE SOLVED: To provide an audio device which can provide auditorily flat sound while suppressing a rise in cost and large sizing and maintaining maximum sound volume where no distortion is caused. SOLUTION: The audio device equipped with a bus amplifying circuit which amplifies the low frequency range of a signal and has variable amplification degree is provided with an input level detecting circuit 6 which detects the level of the signal inputted to the device; and a system microcomputer 9 computes the level of the signal outputted from a specific circuit in this device from the detection result of the input level detecting means 6 and controls the amplification degree of the bus amplifying circuit 3 according to the computation result. |
