Xlr to mixer sound will disappear

Hey guys my quad cortex when it’s connected in sometimes with Stereo xlr my output sound will completely go almost like it just starts fading out to nothing.

This has happened on 3 different occasions now once whilst rehearsing connecting stereo xlr to pa mixer. Twice at a recording studio plugging in xlr stereo to di.

On both occasions I ended up changing to mono jack out and it seemed to start working again.

Really strange one because both leads are working perfectly. Input to qc is good. Power supply is original factory one. I have tried restarting and resetting to earlier date.

This problem only occurs when it’s a big setup at a studio or rehearsal and I go xlr stereo out.

Did you check if the mixer channels have phantom power on?

Its said to cause strange behaviour on QC XLR outs… one of the things I ask everytime to the technical team is to make sure my guitar channels have phantom off.

I will keep a look out on that I can’t say I noticed. Is it a damaging effect or can I just like suck power ? Because it seems to work fine again when I use an output jack.

Have you contacted Support directly yet?
It could be your output board malfunctioning

Yeah I have contacted them mate thanks