In poor English, I was alluding to the fact that I am running the Purifi amps via the Denon on the highest gain db setting. If you had very sensitive speakers, you could lower the db gain and get a bit better sound quality, but less power. I'm not sure there's an audible difference between 117db and 121db, etc. I run them on the highest db to have more headroom for movies, peaks in music, etc.