CASA Schmupf Amp
Small integrated headphone amp for desktop usage with integrated microphone passthrough
Simple leader follower parallel opamp topology.
Signal Path
Input -> Filter -> Input switch -> Input Buffer -> Volume control -> Voltage Gain Stage -> Current Gain Stage -> Output
Bipolar linear post regulated power supply derived from 12V with a REC10K +-12V Module. Voltage for the opamps is +-9V.d