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Four-input stereo mixer

2017-01-01 15:32  
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Four (or more) inputs can be mixed and produce stereo output. Gain of each stage can be boosted by adding RX, but it should be kept below 50 (RX above 2 K) to avoid poor frequency, response. If more than four stages are used, decrease RXto 6 K for six inputs, or 4 K for eight inputs
Four-input stereo mixer

The op amps are 741 or other lower noise types. The power supply circuit is also given.



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