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High and Low Adjustment Passive Tone Board Front Board Pre-stage Board

This is an optimized version of the passive attenuated tone board, and the circuit uses an optimized version of the treble modulation circuit, which is rich in sound detail. Without the need for transformer power supply, the high and low bass can be adjusted. It can be connected in front of the amplifier and in front of the active preamp.

Peculiarity:

Passive design, there will be no ground loop noise problem! And the independent design has a shielded ground wire, which is completely separated from the audio signal ground wire, and the clutter will not be messed up! The installation is even simpler!