Hi again.
To finish this thread I decided to describe my further steps.
After I returned the Palmer Monicon XL due to design errors, I decided to purchase Audient Nero controller.
It has even more configuration options and it is also very flexible.
Nero is a bit smaller than Palmer.
Main knob in Audient is fantastic. Works smoothly as oiled.
Some advantages of Audient nero compared to Palmer:
1. External XLR microphone input for talkback mic with phantom power.
2. Four headphone outputs, each configurable
3. Additional alternative input (aux/coax/opt)
Some disadvantages of Audient Nera in comparision to Palmer Monicon XL
1. I have not found the option to play from several outputs simultaneously
2. When switching the outputs you can hear a click on the speakers
3. No correlation meter
4. No option to configure input sensivity for metering (it is fixed to +18dBu)
At this moment I can certainly recommend Audient Nero.
(If someone notices that the Palmer Monicon XL has fixed this problem with a lack of balance between channels and a lack of mute at the leftmost position of the volume knob, then the Palmer will also be a good choice.)
Regards
Radek
3PM Recording Studio