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1. (WO2018103173) SPEAKER

Pub. No.:    WO/2018/103173    International Application No.:    PCT/CN2017/000649
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Tue Oct 31 00:59:59 CET 2017
IPC: H04R 1/02
Applicants: ZHENG, Wenyan
郑文
Inventors: ZHENG, Wenyan
郑文
Title: SPEAKER
Abstract:
The present invention relates to a novel active/passive dual-purpose speaker, comprising an adaptive active speaker/passive speaker switch, so that when the speaker is not connected to an AC power supply via a power line or a power interface, one end of an audio input/output terminal of the speaker is used to connect to an output terminal of an external audio amplifier, for receiving an audio signal, and the other end thereof is connected to an output end of an audio power amplifier inside the speaker and directly connected to a loudspeaker of the speaker, so that the speaker is in a passive speaker state; and when the speaker is connected to the AC power supply via the power line or the power interface, the audio input/output terminal is used to connect to an audio signal source, an audio signal is amplified by the audio power amplifier inside the speaker, and the audio power amplifier inside the speaker drives the loudspeaker of the speaker, so that the speaker is automatically switched to an active speaker state. The audio power amplifier inside the speaker is fixed on a board surface of a sound-conducting board opposite to the speaker, and a metal heat sink is provided on the audio power amplifier inside the speaker.