Okej!
This is good info!
My dac has several gain settings: -6db (1,7 vrms) -3db (2,4vrms) 0db(4,1vrms) +3db(4,8vrms) +6db(6,8vrms).
My preamp has sensitivity 2.0 v so i guess -3db is best for it with out AL XO filters.
So if Al XO filter makes my gain 7-8db lower + headroom in Roon -3db i can...