Please convince me.
What is your mains power like when you need a conditioning device to improve your audio a little?
I mean: each power supply for low voltage electronics is a filter of some sorts: transformer, rectifier, regulator, etc, etc (or how they implement these thinsg nowadays), so if power irregularites still manage to get past these something is wrong in the devices as well? (within reasonable borders of course)
Please explain why the power does not necessarily have to suck to hear the benefit of a power conditioner.