I had to learn some fuses will breakin much more then others for their end caps are a solid alloy and just like Interconnects can take in some cases over 200 hours .look at the Review online of the Synergistic fuses
The reviewer stated even into the several weeks he then heard them open up. What the review does not say is did he have the unit playing music 24-7
As a rule of thumb I just let play for a solid 10 days or roughly 250 hours to fully settle in components ,as well as fuses. The first 100 hours with the synergistic are tippedup in scale.they donot expose type of metal but
I know their new metal Tungston they use in one of their better cables a small % The majority ofCopper,and Silver.The most depth out of
Any fuses I have tried and I have tried the top 5 most popular out there.
Also for the doubters,look at the metals resistance index steel in the common fuse has 7x more resistance then Copper or Silver ,which is a Huge bottleneck X all the fuses. Expensive yes but low level detail,and
Separation of instruments is what the fuses do best as well as small improvements elsewhere.forget the few bucks spent.i spent over $500
Alone when I had the Ayon Skylla dac 11fuses but sonicly worth it.bsd design,the less fuses the better in a circuit.