LM-40无源音频衰减器

本机特点：

  把线路输出的音频信号降低到很小可以输入到具有麦克风接口的设备上；

  什么是线路输出，比如手机、MP3、电脑、CD机、DVD、电声乐器（电吉他、电吹管、萨克斯、电子琴、电钢琴、电子鼓等）它们这类电子产品输出的，信号强度约0.3vrms-2vrms之间的；

  麦克风输入口要求0.01v-0.1v之间，如果把线路输出信号输入进来，那么信号过大会产生严重的失真现象，本机可以把信号减小到适合的大小，这样就可以把一些音频设备输入到声卡或者音响上话筒接口上，让它们产生混响效果，适合一些玩音乐的朋友进行直播录视频等。

接口及旋钮功能：

  IN输入端口：6.5mm单声道大二芯、3.5mm双声道插座，可以用其中一个或者两个端口同时使用；

  OUT输出端口：6.5mm单声道大二芯、3.5mm双声道插座（已经混合为单声道信号），可以用其中一个或者两个端口同时使用；

   旋钮衰减量调节：-40db~-15db。

Local features:

Reduce the audio signal output from the circuit to a very small level that can be input into devices with microphone interfaces;

What is circuit output, such as from mobile phones, MP3 players, computers, CD players, DVDs, and electronic musical instruments (such as electric guitars, blowpipes, saxophones, electronic keyboards, electric pianos, electronic drums, etc.)? The signal strength of these electronic products ranges from approximately 0.3vrms to 2vrms;

The microphone input port requires a voltage between 0.01v-0.1v. If the output signal of the circuit is input, excessive signal will cause serious distortion. This machine can reduce the signal to a suitable size, so that some audio devices can be input to the sound card or speaker interface to produce reverberation effect, which is suitable for friends who play music to live stream and record videos.

Interface and knob functions:

IN input port: 6.5mm single channel large two core, 3.5mm dual channel socket, can be used with one or both ports at the same time;

OUT output port: 6.5mm mono quad core, 3.5mm dual channel socket (already mixed into mono signal), can be used with one or both ports simultaneously;

Knob attenuation adjustment: -40db~-15db.