开关弹起时转折频率150HZ，50HZ最大衰减量-10db；
开关按下时转折频率250HZ，50HZ最大衰减量-14db；
输入接口：立体声3.5mm，RCA莲花接口；
输出接口：立体声3.5mm，RCA莲花接口；
输入阻抗：50KΩ；
输出阻抗：50KΩ。
Function: Attenuates the bass part of the audio signal to improve sound clarity.
When the switch is off: the cutoff frequency is 150Hz, and the maximum attenuation at 50Hz is -10dB;
When the switch is on: the cutoff frequency is 250Hz, and the maximum attenuation at 50Hz is -14dB;
Input interfaces: Stereo 3.5mm, RCA interfaces;
Output interfaces: Stereo 3.5mm, RCA interfaces;
Input impedance: 50KΩ;
Output impedance: 50KΩ.
