I’m contemplating upgrading to a DAC+pre-amp+mononblock which obviously will require four outlets.First question; is your AC line 15 amps and is it shared by other wall receptacles in your house or apt?
Second; how powerful are the monoblocks? If there is too much current draw, you will trip the circuit breaker.
If you are able to run all your components on one circuit, then a high quality power strip or conditioner would be a solution.