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I don't know that anyone is questioning that no fuse, done well, would in most cases, likely be the better sounding solution. I use a polished copper plug in my DAC since I have never had a fuse go in a solid state front end, so willing to risk it. And it did sound better than a standard glass fuse, more dense and complete. I never compared it to a better fuse, but I will try to remember to do that. I have blown a number of fuses over time in amps though, rectifier cathodes frying, and there I am not willing to do without some protection.
Can't say for sure on your ideas about these fuses, since as I read it, you don't explain just why you don't trust these fuses technically, except that you don't like the basic concepts and functions of fuses if they can be avoided, not really in question for me either. But I take you to imply that you suspect the technology due to your view that more energy went into the selling than the engineering... Especially with bigotry around relative to Chinese people and things, and language issues, I can forgive attempts to make them sound worth checking out and the imperfect hype.... other than what seem like translation issues, explanations not unlike a lot of American and Euro companies that have proven legit. And "buzzwords" in trying to explain something, to me, do not make the fuses bad.
I can say that Gustard is one of the more sophisticated design teams (engineers) out there for good quality and really good sounding (relatively value) DACs. One of these fuses is theirs. I modified my Gustard DAC, which brought it to another level, but stock, it was just about $800 delivered, and compared by some folks favorably (they liked the stock Gustard better) to Schitt Yggdrasil, Auralic Vega, and some others. With perhaps a few hundred more in parts, and some time, it became pretty world class to me.
So in the fuses, beyond likely "stabilizing" the good wires used, as JBZen was hoping for with quartz, as well as the wire connection to the good quality ends used (over standard fuses), I guess for now I will believe the designers in their valuing the quartz in the ceramic tube (quartz also known to pull noise from circuits), and copper powder. And graphene in some of the other fuses, is known as a very clear conductor, one I have heard in contact oil containing very fine graphene and found impressive.
For me, my "trust" will be tested by the listening. If it is real and useful tech, it will sound faster, more dense, open/spacious, fine detailed, etc. I ordered a few to try, but they will likely take a while to get here. Looking forward to the experiments though.
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