High-end four-channel mixer
Source: InternetPublisher:红水杯 Keywords: Amplifiers power supplies and other power circuits Updated: 2020/02/28
To provide an excellent signal-to-noise ratio, the four-channel hybrid amplifier controls the signal levels after amplification and mixes them to form the output. Because the input impedance is very low, this circuit can be used with any dynamic microphone from 20 ohms to 59K, but cannot be used with crystal and ceramic microphones. NOTE: All four circuits are identical, but only one of them is complete.
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