Fuses fuses fuses

I can't speak to the average fuse holder and fuse dimensions mentioned, but the ones in my Marantz Reference don't appear to be average.

They appear to be silver plated (not really sure)
They  have a shape that can only hold the fuse in one manner
They require effort to remove (the circuit board literally lifts upon removal)
They can be rotated in place but it is not easy to do so 
Comparatively, they have a much tighter grip than any bananas I've encountered with speaker cables and speaker terminals

These facts then to relegate the "what could be wrong with fuse holder" arguments to a fall back position: a general statement.

I readily concede that not all fuse holders are equal but that implies that some don't fall into the category of holders with poor contact points. It could very well be that Marantz takes all aspects of QC seriously and rejects lots of fuse holders or goes for a top grade vendor to supply them or even makes them themselves. I can't really say one way or the other but then, how often does this come up in discussion?

All the best,
Nonoise

So to be very clear this is only reducing the voltage drop of the fuse **in the holder**. Its not only audible its also easily measured.

To clarify this more, it "maybe" only audible if the supply stages after the fuse/holder are NOT regulated. Most sources, s/s preamps are so it shouldn't be audible .
Some power amps can be, most not. 

Cheers George

Atmosphere
"...fuse nor the fuse holder have perfect dimensions. As a result, there is a small amount of resistance at the contacts as the fuse sits in the holder. If you shift the fuse around you can reduce or increase that resistance. That is why they **appear** to be directional.

Now this is easy to measure. All you need is a DVM (Digital VoltMeter) and you simply measure the voltage drop across the fuse in the circuit. Its not going to be very much, so a DVM with more than 3 1/2 digits is helpful but not mandatory. If the fuse is in an open holder, you simply rotate it in the holder and you can watch the voltage drop across the fuse rise and fall. The least voltage drop is what you want."

>>>>>All we need? If it’s so easy to measure why don’t you or one of the other naysayers measure it? You’re just guessing. Why is it the folks that are already on board the fuse directionality AND Wire Directionality train are supposed to be the ones to measure it?

All wire is directional. Hel-loo! We Covered that in Fuses 101. More to the point HiFi Tuning data sheets already show the measured the differences in fuse direction. Not just their fuses, all manner of fuses, including stock fuses, ceramic fuses, cryo'd fuses. Guess what! It has nothing to do with the fuse holder. You act like this wire/fuse directionality thing is all new to you. The fuse holder argument can't save you in the cable directionality argument, now can it? These silly fuse Doubting Thomas threads have been going on for fifteen years. The wire directionality Doubting Thomases even longer, what, 25 years?

@atmasphere 
Sorry if I put words in your mouth. I appreciate that you have clarified what I thought you meant.
 -That was why I posted if there was a way to insure a fuse would have complete contact in a fuse holder.
Bob

Geoffkait 7-13-2017
If it’s so easy to measure why don’t you or one of the other naysayers measure it? You’re just guessing. Why is it the folks that are already on board the fuse directionality AND Wire Directionality train are supposed to be the ones to measure it?

He did measure it, Geoff.  That has been stated or clearly implied multiple times in his posts and in excerpts of his posts I have quoted, including in this thread.

More to the point HiFi Tuning data sheets already show the measured the differences in fuse direction. Not just their fuses, all manner of fuses, including stock fuses, ceramic fuses, cryo'd fuses.

Those measurements have been totally debunked as being supportive of inherent fuse directionality, ***even if it exists,*** on innumerable occasions and in great detail in numerous fuse-related threads here, all of which you have participated in.  By me, by Roger Modjeski of Music Reference and RAM Tube Works, and by others.  Surely you remember?

Regards,
-- Al