Four-input stereo mixer

Posted on Jun 19, 2012

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
Click here to download the full size of the above Circuit.

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

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