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Old 3rd July 2015
  #5
Lives for gear
 

I've never had a problem with bc transistors. the basic design is not bad if they actually used a split rail power supply on the op amps like everyone else does.
most of the noise would be from the resistors and not from the active devices. however I do see there could be a way to inject some nfb into the the emitter of the one side of the first stage from the output of ic2 to get rid of some more noise.

but I can see that the quality of the power supply would be quite paramount in this design.