@bopodoq thanks for the response above
Out of curiosity I decided to just look everything up, as my rack gear is not so many pieces. I found only half of my rack items list their power consumption, and the ones that do list a range of 30-70W with typical draw around 30-40W. I'm on a normal "home" circuit of 15A in the US (implying max load of 1800W and circuit breaker tripping around 1440W). SO it looks like, unless I have a giant power hog on the same circuit, I should be fine to run my updated audio rack.