Passive Tone , Bass Treble Control Equalizer BT Board (Assembled 12 0 12 Dual Supply)
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- 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!
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