| 摘要 |
PURPOSE:To avoid useless investment and low power consumption by connecting an input terminal of a changeover means provided for switching an external audio input signal to plural external audio signal input terminals individually and its output terminal to a speaker output terminal. CONSTITUTION:Input terminals 61-6i of a changeover means 5 provided for switching an external audio input signal are connected individually to plural external audio signal input terminals 41-4i and its output terminal 7 is connected to an external speaker output terminal 8 to output an external audio input signal selectively to the external speaker output terminal 8. Thus, the speaker 9 is used in common to save the space and the duplicate investment onto the speaker is avoided and also the audio signal inputted from external electronic equipments 21-2i does not pass through an audio signal path with a high impedance such as an amplifier but is switched directly by a changeover switch, then power consumption is reduced. |
