under
https://www.circuitbasics.com/design-hi-fi-audio-amplifier-lm3886/#Balancing-the-Input-Bias-Current(go to "Ground Loop Protection Circuit") was in parallel to this resistor a bridge rectifier (actually two diodes).
If the voltage across this resistor goes above 0V65, one of the diode does start to conduct and protect the resistor - also to find in Bryston amp devices - go to post #9+13 here.
Good or not ?
https://www.circuitbasics.com/design-hi-fi-audio-amplifier-lm3886/#Balancing-the-Input-Bias-Current(go to "Ground Loop Protection Circuit") was in parallel to this resistor a bridge rectifier (actually two diodes).
If the voltage across this resistor goes above 0V65, one of the diode does start to conduct and protect the resistor - also to find in Bryston amp devices - go to post #9+13 here.
Good or not ?