* This balanced line stage is the classic "differential pair" topology with

two identical gain devices connected to develop voltage gain from a

differential voltage input.

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* The circuit amplifies a differential input to a differential output. Given a

single input, it will amplify it into a balanced differential output, and is

useful to convert unbalanced signal to balanced, either because you

wish balanced operation or because you wish to convert a conventional

stereo amplifier into mono bridged operation.

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* CCS = Constant current source biased

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* It's Xed.. the 'tric' from Nelson's patents





Add a separated power supply... 

To lover power supply noise.

 



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