How to Build a Balanced Stereo Line Driver for audio testing.
Testing an amplifier with a balanced input is easy if you have an audio source that has balanced outputs. If you don't, then testing is still possible if you simply short the 'cold' input to ground.
However, to fully test an amplifier with balanced inputs, you really need to test it with a balanced source, and this is sometimes a problem if you want to use a signal generator, or single-ended music source.
This simple project is meant to rectify that problem on my work-bench. It accepts an RCA input and produces a balanced signal through an XLR socket, with relatively little distortion or degrading of the signal.
Elliot Sound Products has an excellent write-up on this circuit, so have a look for yourself:
sound.whsites.n...
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11 сен 2024