The gain is on the low side. 40 - 60 is what I run and it’s a bit louder with 6 volt tubes at the 5ma bias setting. Of course there are many other factors such as speaker efficiency, room setup and XLR vs single ended connections, with the former 6db louder. My Pass XP-22 sounded appropriately loud at 65 - 80 out of 90, the upper limit I think. Now the ARC Ref 6 I’ve had recently will blow me back in my chair at 35 out of 100 or whatever it’s limit is!