Actual power draw is measured, and it might be the most realistic way to assess your needs. Max power is estimated, by adding the max powers of the devices you tend to have on at any given time. The speakers’ power ratings matter only if it is about the consumption from the power outlet (110/220V ac), not about the audio signal from the amplifiers. Specs of the actual devices might mention both.
I use one outlet for all my main audio-video space. That’s an 85” OLED Sony TV, Denon AVR-2200W, 2 powered 12” subs and a Technics turntable, all of them being on at various times, and using reference level when watching some movies. I also have some other gadgets in the same outlet, but their power consumption is of little significance. This is just an example, your equipment and their use may vary.
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