Thnx for replying!
The question is if avoiding the potentiometer in rca out of the interface is better than balanced with the potentiometer in line with the amp.
And second if I do not use rca line out what would be the optimal volume setting of the interface …
About the second I had the thought that because of the A20h has a resistor volume control may be set it to a high(ish) setting and control the volume from the interface… (like the A20h is a “power amp”)