I guess I'm lucky to use old school intigrated power amps which have the "soft start"
I always turn my interfaces master volume off, but I leave the volume of the Technics intigrated amp at it's 12'oclock setting. Never hear a pop.
I have 2 Furman line conditioners daisy chained so one is a master switch. I also have one of these I use to power up things I don't use everyday, I have a couple of these I find at Goodwill for $10. They were for
the old systems that you had to power up in sequence marked , computer, printer, monitor ect.
If I ever buy powered speakers I'd use one of these.