My GCHA has no sound out of one (left) channel (and the right channel sounds fainter/less dynamic than it should, but that might be in my head…).
The same issue exists with both the USB DAC input (which I never use, but did to test) and the RCA inputs. I don’t have XLR cables to test the XLR inputs.
I love the amp, and had recently bought an HD650 specifically to pair with it so I want to get it working!
I’m happy to send it back to Colorado but thought I’d test the waters for possible issues first.