Checked the above, and it seems that when I switch the Bypass mode to Relay the two channels are at unity again. Switching to either DSP or DSP+FX will drop the #2 audio.
That would probably tell me there is an issue with the DSP….
I have contacted the store where I purchased my unit (Andertons, UK) and they are unable to help as I am one month out of warrenty.
What do you guys suggest?