My serial is MX-03880, so, I quess 03880, if that is the right number (it’s under the model number).
Not near that other posted serial.
Gain knob as it should be in this setup.
I hope you guys at eventide check some units and hear the possible di out hiss/noise yourself. If you don’t get any noise or difference between an external di box vs. Mixing links di out, there are bad unit out.
Let us know,