Hi Nick
Besides the the interconnects there is also the issue that my dedicated power line runs to an outlet located on the wall between the speakers.
IMO - I rate the quality of electricity as important as the room. I did not want to deal with extra cords and I know I have a problem with moving gear around a lot. I did not want to be at the mercy of the wall outlets. So I had the electrican install a shielded flexible dedicated line with 4 outlets on the end. This flexible line will reach back into the deepest section of the room if needed. My amps get plugged into it.
This flexible line has provided me the freedom to place gear anywhere and experiment.
For my neighborhood my meter has shown anywhere from 115 at the worst in summer to 122 depending on the time of year. I can remember years ago when turning on the amps and the lights would dim momentarily.
Cheers Chris