I'm a long-time believer in the impact of electrical noise on audio sound quality. Dave's UberBuss and DigiBuss work wonders on my system and certainly have me curious about his newest BetaBuss. But there is also a ton of tweaks on the market (likely much of it crap) that make great claims. And as with much of it, good reviews abound.
A product I just read about is the High Fidelity Cables MC-0.5 Magnetic Wave Guide. Not cheap ($300). Like the old PS Audio noise harvesters and the like, it just plugs in an outlet - the more the merrier - and claims all sort of good stuff. No doubt, a lot of it is marketing hype, but just curious if anyone here has used it. Better yet, does anyone understand the science behind it?