High-level four-channel mixer

  
To provide good signal-to-noise ratio, this four channel mixer amplifier controls the signal levels after the amplifiers, and then mixes them to offer a combined output. The circuit works with any 50 ohm to 50 K dynamic microphone but not with crystal or ceramic mikes because the IC input impedance is low
High-level four-channel mixer - schematic

Note that all four circuits are identical but that only one is shown complete.




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