Describe your issue:
When unit is powered off but connected using Outputs 1&2 I get a very loud buzz (ground loop) feeding whatever mixer or audio interface and I am forced to disconnect the cables to stop the signal. If the QC is in standby this does not occur ony when selecting power off - seems to be like an earth / signal leak rather than entirely muting the outs after powering down.
Steps to reproduce your issue:
Happens everytime I keep the unit connected and power down.
I expected this to happen:
When I power down and leave the QC connected I’d expect silence - no output or ground loop
I have tried the following things:
New XLR cables, Isolate Out 1 and 2 no change.
I agree to email support but have you also tried changing your signal grid output to multi, out 1/2 or out 3/4? Also when diagnosing, please disconnect everything (e.g. USB, sends/returns etc.) and just use XLR outs 1/2 etc.
NDSP recommends to use the QC standby feature instead of turning the unit off. Although I have never experienced any noise/hum, others have resolved via utilizing an alternate PS and or power conditioner. If you still have issues with the unit in standby, please reach out to firstname.lastname@example.org and they will get you sorted.