M V COLLECTION VOLUME,BASS, AND, TREBLE CONTROL EQUALISER WITH CONNECTING WIRES FOR AMPLIFIERS , HIGH QUALITY Electronic Components Electronic Hobby Kit

This is an optimized version of the passive preamplifier tone board WORKING ON 12 0 12 DC SUPPLY the circuit uses the optimized version of the high and low tone adjustment circuit, the sound details rich. Passive design, no ground loop at the end of the problem! And independent design with shielded ground, and audio signal ground completely separated, the clutter will not chaos string