1、Dual Operation: Tonality controller high performance, low noise, dual operational amplifiers, integrated circuits are similar to many standard operational amplifiers. 2、Low Noise: Power amplifier tuning board has better noise performance, excellent output drive capability and relatively high small signal bandwidth. 3、Good Contact: The input part adopts double linfa seats, in order to be better compatible with other power amplifiers, with good contact performance and long life. 4、Wide Voltage: On the power input, a wide voltage power supply is used, and the rated voltage can be balanced on the dual 12V, IC, and the power supply is stable. 5、Wide Application: Pre amplifier tonality controller is suitable for application in professional musical equipment, instruments, control circuits, etc.