True enough,if you use 15a,20a outlet(That's all you'll get)
pre,cdp,dacs don't need much power.Power amps seem to like alot more at times.I'm using Torus and their transformers are huge.If my memory is correct it can give you up to 400a(short term).There is alot of info on the audiocircle site.I use to use Shunyata before and HOLY COW,what a difference the Torus
makes.A huge,huge upgrade.They are pricey(rm-20a-$3200.00,
rm-10a $1800.00.they do have smaller ones also.
I believe you would add up maximum amperage that each component can absorb at full power and divide by 2/3.
For me 5X7Bs=5X16.5a(at full power 4ohms)82a and at 8ohms 41a.
So 2/3 of that is 65a at 4ohms and 27a at 8 ohms.Except for my power amps,I would never sell the Torus,She's too good.