OK, I just removed the fuses (Isoclear not HiFi Tuning, but I have those around here somewhere) on the back of my too resolving and refined Maggies, and tried the standard fuses again.
Yeah, no change, still sounds the same. I'll find those HiFi Tuning ones around here somewhere and try those.
So my vote is, makes no difference. But then again, my system is so refined I can't hear any difference. Well, actually, isn't that pretty much the opposite of how it should be??
I can tell you that when something sounds like crap upstream, I can hear it. I have tried many a piece of gear, only to turn around and sell it, including some great amps that just didn't match well with my other gear.
But, back to the fuses, I'm voting for Audio-Placebo effect. Then again, for under $100 it can't hurt to try!!