migo Posted October 15, 2022 Report Share Posted October 15, 2022 21 hours ago, audiostar said: Could you please check out that XLR cable you connect your DAC and amp, how is it wired internally? Pin 2-2 and 3-3 are ok, question is about pin 1: does it connect to the shells on both sides as well or is it pin 1-1 only and does it connect pin 1-1 on both sides of the cable? Hi @audiostar, that cable is pin 1-1 only. But I think it is not that problem, because this noise is there when inputs are floating too with no device connected. 21 hours ago, audiostar said: Strange as well, have you tried with another pot? I've no other 4 gang pot here, but I've tried with Kevins stepped digital attenuator and it was the same unf. 21 hours ago, audiostar said: As you basically have a dual mono setup, try completely separating ground for both channels, and connect then each ground centrally to the chassis (via the 10R resistor as you did or a real circuit breaker). So you will have a star ground per channel which is connected to another star (chassis at IEC connector with both channels master grounds). What you did with separating ground on the pot was the right beginning in this direction. Thank you, I've not tried this option so far I'll try it. Quote Link to comment Share on other sites More sharing options...
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