ProtoDAC TDA1387 X8 project

[hifinet]

One comment on the Lampizator circuits is regarding the bypass cap (100uF) across the cathode resistor. If the added gain is not needed, I think it generally sounds better without the cap. The audio signal is essentially passing through the electrolytic capacitor, which adds coloration (the same applies to cathode bias in the power amp output stage; fixed bias sounds better). Also, without the cap, there is some local feedback, which reduces distortion.