I personally did not feel like I was qualified “enough” to answer your very good questions and offer comment on your opinions
I asked for the team to review your post.
There are a few Teams involved - We are a small group and there will be times when we will be behind. Apologies for being a bit tardy. We have Dev work going on for LSA, Vera-Fi and Bob Carver Corp all this week.
Below please -
Mark:
Your customer makes a fair and intelligent argument, and is correct, at least as viewed from a macro perspective.
When viewed on the micro scale, there are resistance parameters that do change with heat on an instantaneous basis and these changes do matter. It is likely the reason for why any improved fuse sounds different. We know from our own testing that placing a grossly oversized fuse in a product needing only a much smaller value results in an audible improvement. The larger the replacement fuse, the better, all the way up to what you call “sluggo”, which is universally best.
To what would you attribute these differences? To us it is the result of micro-heating limiting the power supply’s access to transient current. There could also be the possibility that fuse element vibration is at play as well, but resistance is the only measurable phenomenon we can point to. That, however, does not mean it is the only difference.
Such is the nature of measurements and hifi.