I have no idea whether fuses matter or not. But Ayre instructed me to remove my fuses when I told them I bought a used VX-5 Twenty amp and it came with HiFi Tuning Gold fuses. He (not going to mention his name) said you'd be amazed at how many 'audiophile' fuses are poorly manufactured and as such, set their unit into fault mode (which in my case, he was right). All tested fine with my meter but nevertheless, the Ayre didn't like them. A month or two later, I had to send the amp in to them to have new caps installed (maybe unrelated, maybe not) and they put in clear generic (and I assume cheap) fuses. Surprised they weren't even ceramic. The amp sounds amazing so I'll just say ignorance is bliss in my case. No thanks on trying those things again.
The guru on fuses:
For two years, I have asked why and how fuses could possibly matter. All I got was arguments of faith, pro or con. I needed a real audio guru who actually knows. Here is a link from John Curl’s discussion on Parasound’s website. He engineered and designed some some great equipment, including some Mark Levinson gear, The Grateful Dead’s 30 plus McIntosh amp powered Wall of Sound, and his admittedly, somewhat price compromised Parasound designs. He discusses the electrical properties of standard fuses, showing how they are compromised. The entire article is quite enlightening, but to skip to the fuse section, go to the bottom half of page 6. https://www.parasound.com/pdfs/JCinterview.pdf