Spire 4558 3IC Volume Bass & Treble Equalizer Board with Knob Cap Micro Controller 1J Sound Recorder and Sound Circuit Electronic Hobby Kit
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3 IC Pre-Amplifier Bass Treble Board 100% Branded . Easy to use Amplifier This is an optimized version of the passive preamplifier tone board, 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