A heavy duty extension cord, like a #14 AWG, coming from elsewhere can give you the relief you seek from added draw on the current systems power lines. I use a couple here and there for my PC & pc peripherals.... also for the Synergistic cabling I use. A PS Audio UPC 200 supplies all that stuff, feeding other power strips, BTW... I see they're not expensive any longer... about $200.... a Duet though would be a better pick at that price tag however IMO.
... as shortening signal cables is always a good idea... and extension cords cost what? $6?
Hell, at that price try a few... I've found some can be additive to the sound! They come in colors too! I like the flat white 14 AWG from HD & the beige 12 AWG from WalMart.