Rafael, thanks for your kind words. I’ve read many of your posts over the past couple of years and have benefited from your knowledge and experience. BTW your idea about the XLR connector was a good one. An improperly wired XLR on one side (channel 1 or 2) will put the signal 180 degrees out of phase. It’d be the first thing I’d check since it’s easy to open the connector and check which wires are going to which pins. If there’s a patchbay involved, that’s a bit more involved.
John
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