Turn mute on or volume all the way down, whenever you turn stuff on or off or switch inputs. If thump is not loud you will be OK.
Turntables thump when turning off?
Why? I have used 4 different tables and three phono stages in 2 different systems and all of them produce a pretty loud thump when turning off especially, sometimes when turning on. I have been muting the system each time I turn off as it seems a little much to be letting such a thump reach the speakers. Is there a cure? lift grounds? arrange cables? I was getting a pretty decent hum at times and I've noticed careful routing of the cable to the phono preamp makes a huge difference in this.