@jimmydd - Years ago, I contacted Ayre with a similar question about whether they recommend using aftermarket "audiophile" fuses. I was referred to somebody in the service area who told me they were evaluating how to handle situations where an aftermarket fuse might contribute to an equipment failure and whether to cover such issues under warranty. He indicated they probably would cover those situations (which is consistent with their reputation for great customer service). During that conversation, he never endorsed the use of aftermarket fuses as a way to improve the sound of their equipment and my recollection is that he didn't believe they did much, if anything. On the other side of the coin, I do know one amplifier designer who believes there are differences and improvements resulting from certain fuses and does endorse the use of aftermarket fuses in the equipment he designs.
BTW, for you folks who did not read the OP's whole link, you need to scroll down and you will find the:
Quantum Science Audio Ultra High-End Fuse ($2,844 ea)
