To solve the problem that power for a main body device can not be raised on a rear side in a dual mode.

A main body device 2 is provided with a plurality of sound sources 12, 13 and 14 such as a CD, a speaker 5 and a headphone 6 for outputting audio signals as voices from the sound sources, and a mode setting section 37 capable of setting a single mode for outputting an audio signal from one sound source as a voice from the speaker, and a dual mode for outputting an audio signal from the other source source as a voice from the headphone. This device is further provided with an external connection section 11 for externally connecting an external DVD device 7, and a control section 38 for controlling the mode setting section so as to raise power for the main body device in a dual mode when a power starting request signal from the external DVD device or a rear side operation section 4 while the power for the main body device is OFF.