A component's power supply should ideally be indifferent to the source of the power within certain margins. If things between the back of the box and the power plant make a difference, that's a basic failing of the power supply. I'd pour my money into making the power supply more resistant to minor variations in the power source before trying to doctor the problem with expensive Band-aids.
Power help
I know that power is probably the weak link in both of my systems. I have a Linn system in my media room and Violectric headphone system in my office. For both, I have them going to an APC XS1500 Backup UPC. Is this terrible? My house does have occasional power hiccups and outages. Can someone please give me some advice on reasonable ways to upgrade my setup?