带钟声前置放大器

需要用到后级功放的场合，如学校、工厂、宾馆、社区等喇叭较多，功率要求比较大，要用前置放大器对后级进行控制，内置钟声和报警模块，内置多级优先电路，可以一边讲话一边放音乐，还可以让讲话优先于背景音乐，当讲话完毕背景音乐自动返回。

Need level of the amplifier occasions, such as schools, factories, hotels, community trumpet, and so more large power requirements, the use of after-class pre-amplifier control, built-in clock and alarm module, which Purchase multi-level priority circuit, you can put aside the speech side of the music, speech can also take precedence over background music, background music has finished his speech when the automatic return.

8路输入（5路MIC,3路AUX），音量独立调节。
3路优先功能（1路MIC，2路EMC）。
高低音调节。
特设叮咚声，音量可调。
特设报警功能，两种警笛声，音量可调。

8-way in(5-way MIC,3-way AUX),volume level control independently
3-way priorlty function bass and treble adjust independently
built-in DINGDONG sound,volume level can control
built-in alarm system(two kinds of alarm sound),volume level can control