Even though some of you who have had no actual experience seem to be in a big hurry to dismiss what b_limo is hearing why are you assuming that he is not an experienced critical listener who is intimately familiar with his own system and is obviously very pleased with the improvements the fuses made ? Don’t you think that it’s awfully dismissive to be telling him that he can’t possibly be hearing the better sound that he is actually hearing ?Any EE engineer will tell you it’s impossible (snake oil) for a AC fuse to do this, unless it’s aged like this (linked), then that is debatable also.
What you most likely heard was a fuse that’s seen too many turn on cycles, they get fatigued and hardened and build up crusty deposits , like these have with too many turn on cycles.Same "could" be here in some way, maybe with fuse aging.
Left to right https://ibb.co/G9XGH8Y
Right to left https://ibb.co/b5dz1q5
Or what he heard when he started this thread at the same time, but it was tone controls of all things that were the problem, after much anxious hair pulling, re his last 2 posts
https://forum.audiogon.com/discussions/cd-transport-vs-streamer-2/post?postid=1991316#1991316
https://forum.audiogon.com/discussions/cd-transport-vs-streamer-2/post?postid=1991313#1991313
Cheers George