Ovicart 4 Transistor Bass Treble Pre-Amplifier Bass Treble Control Equalizer Board 0-12v Electronic Components Electronic Hobby Kit

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! Installation is simple but still proper knowledge is required. This is an optimized version of the passive pre-amplifier tone board, the circuit uses the optimized version of the high and low tone adjustment circuit, the sound details rich. Without the transformer power supply, you can achieve high and low tone adjustment. Can be connected in front of the amplifier, active front of the pre-amplifier