Dear
@lewm : In theory in a good electronics design a fuse function is to protect the unit electronics and with no other kind of influence as the quality level unit performance but as your experiences not always is that way at least not with the boutique fuses that in general shows that makes a difference mainly for the better as
@geoffkait says and the thread he makes reference.
Your experience says other thing. Now: is it real that boutique fuse differences for the better?, this is a " hard " quesion because there are several audiophile reasons to think that that always happens:
when one audiophile spend 100+ in a single fuse and only because the amount he spends on it he is waiting for sure that will be listen an improvement and is ready to listen it in the very first moment he change it in his system, so he is totally and heavy biased to listen an improvement but audiophiles does not changes only and only one fuse but 2-4 fuses that means that spends 200+-400+ on fuse tweack in his system and he has to justify ( even if it is not justified. ) the amount he spends.
Now if he shares his heavy biased experiences in a thread that one person fuse bias is converted truly fast in a collective " madness " shared by other audiophiles that were all biased through that thread when in reality it does not happens but what they want to hear and they want to hear improvements no matter what.
Now, if we read the words/adjectives used to express those kind of improvements we can attest that those " improvements " just does not exist in live music at near field position that's where recording microphones where seated/positioned.
The recorded LP grooves signal does not pass directly through the fuse then why people say it changes the quality level performance of that signal ? ¡ ? ¡ ? in theory must be no change if the power supply and circuit signal design is a good design.
This is athread posted by a very well regarded amplifier designer/manufacturer that speaks per sé:
https://www.audiocircle.com/index.php?PHPSESSID=7luqg9gotsd94src6a9dppot71&topic=105425.0 I think that any audiophile must read it, a very learning thread.
""
this fuse directionality means
all wire is directional. "" and means?
@geoffkait take the headshell wires in one of your cartridges and invert the position and then after some tests about please share your experiences about your conclusion.
R.