New user here & so far happy with CQ12T but I cannot listen to the main mix through the headphone jack. I can listen to individual channels when headphones are engaged BUT I cannot listen to main mix overall. Also, some of the channels work when headphone button engaged but others do not work & they have a full signal being sent. But my MAIN ISSUE is that I want to hear the overall mix. I have used the configure screen to assign Main L/R as the source for the stereo output jack and it does not work! I have a full mix going to the mains but I cannot hear this in the headphones. The CQ12 only has one balanced stereo output jack. Any help here would be great. Thanks!