1、Easier Control: Capacitor parallel filtering, pure power supply and better working environment of XR1075 enable more convenient volume control. 2、Free Connection: Supports multiple interface connection methods. Also has terminal block and signal block that converted to each other. 3、Potentiometer: Designed with short circuit point and potentiometer, you can directly jump off the volume potentiometer or turn the volume to the maximum, which can better control the working state, and more playable for DIY. 4、BBE Technology: BBE technology can make high frequency signals to arrive at the human ear later than low frequency signals, resulting in distortion, phase compensation, harmonic compensation, and bass delay. 5、Practical Use: Contour enhancement and other technologies adjust the phase and amplitude relationship of high, medium, and low bass to make the reproduced sound more real and natural. Item Type: Sound Exciter Material: Circuit Board Model: XR1075 Power Supply: AC9V-20V; DC10V-26V Audio Input (3.5mm socket): CD, computer, mobile phone, MP3, MP4. Audio Output: Connect to amplifier (2 channels). Potentiometer (from left to right): Bass adjustment; treble adjustment; volume adjustment. Circuit Design: Source, electronic switch of XR1075, XR1075, amplifier. Anti Reverse Connection Protection: Diode Operation Indicator: LED 1 x Sound Exciter 3 x Nut 3 x Washer