| 摘要 |
PURPOSE:To prevent damage on or danger to a speaker by detecting connection or unconnection of an audio equipment and setting automatically a VR value of a VR circuit built in the audio equipment so as to facilitate the adjustment of an audio output. CONSTITUTION:The system is provided with a connection detection means 1 for detecting connection among a source equipment 10 generating a sound source, an audio equipment A11 having a VR circuit 12, a microcomputer 13 and a 1st VR key 14, and an audio equipment B15 having a VR circuit 16 and a changeover section 17 and with a VR setting means 2 setting the VR circuit 12 of the audio equipment A11 to a predetermined set level, that is, a maximum output level at the time of detection of the connection, and the VR circuit 16 of the audio equipment B15 adjusts an output of a speaker. |
