Question about suitable fuse metals

I've been using the copper slug in a Red Dragon S-500 and a titanium slug in a Bel Canto DAC 2.8 for 4 days now, perhaps up to 6 hrs per day and the sound has really transformed.  Initially, the sound with the slugs in place of the stock fuses was noticeably better but hard to quantify.  Images had more body to them and the sound was a bit smoother but not by much and there was another quality I just could not quite apprehend.  

Listening late last night and this evening I'm better able to determine what quality I've been hearing as it has become more clear to me now.  My system, already quite detailed, isn't really any more resolving than with the stock fuses but, apparently the fuses smear the fine inner detail and, what I'm hearing now, is that detail clearly.  A good example are the tabla or other small hand struck drums.  I've heard them many times in selections from Dead Can Dance and it always sounded more like an oscillation than a series of very quick drum strikes.  With the slugs in place, I could finally clearly hear each individual strike of the drum---CLEARLY.  

Similarly, each sound was clearly defined in its own space with that always present smearing finally gone.  I was listening to a lot of ambient last night from Steve Roach, O Yuki Conjugate, and Randy Grief and I could REALLY hear each individual sound in its precise location.  It truly was like hearing this very familiar music re-recorded on a higher resolution format, like what I had been expecting when I bought into SACD and DVD-A but they had not quite delivered.  

Thanks for all the recommendations.  Safety would dictate I now invest in audiophile fuses and maybe I will and maybe I won't.  I just can't imagine they will sound better than this without a BIG investment, if at all.  And even then, does a $500-600 fuse in a $2000 amp make sense?   As for those of you telling me I'm being ridiculous or stupid, c'est la vie .  I bet my stereo sounds better than yours!

Listening late at night always sounds better.   But the fuse was the cause?  Color me skeptical.  

Yes, the slugs were the cause of the very significant improvement in sound as that's the only variable that's changed and  I've literally listened late at night THOUSANDS of times and I've not heard this precision of sound, in my systems, ever before.   Try it yourself.  Between the 2 rods acquired from Mcmaster Carr for around $20, 6" of 99.99 copper and titanium with shipping and $30 to have a machine shop cut them to 20mm lengths (of which I have 7 copper and 7 titanium), my total investment was close to $50.  I would have gleefully paid 10x this much, much more if I could afford it for the kind of improvement I'm hearing.  Of course, it's going to be highly dependent on whether your equipment is resolving enough to reveal this kind of detail.  I doubt replacing the fuses in an A/V receiver with slug would do much of anything.

I’m okay with bypassing the fuses in a audio system. But, I’d recommend the following:

Install a heat sensor (standard security system hardware) above the system. Hook a 12v solenoid (plunger) to a power supply. Mount this adjacent to a wall-mounted fire extinguisher. Decorate to blend with existing motif in the room. So, when system is ablaze, the wax in the temp sensor melts causing the little spring to push the contact closed, activating the solenoid, that jams the plunger into the trigger on the the fire extinguisher, putting out the fire. Might be a little "collateral damage" but, hey, much cheaper than building a new home. Pretty basic engineering. Low cost. And, no fuse!!

But, seriously, if we really want to get "tweaky" here, I’d take some very high quality power cable and jumper around the fuse hold completely and silver solder the connections to the board. This would bypass all inferior metal, and eliminate a contact/relay point in the circuit.

CIrcuit breakers are preferred by many. We’ve substituted chassis mounted circuit breakers in place of fuse/holders in vintage gear with good results.

I don't need homeowner's insurance (never had my house burn down before), don't need to screen for cancer (never died from cancer before); don't need to look both ways before crossing the street (close, but never been hit by a car while walking).  WOW, there are plenty of things I don't need. 

Why put in slugs when you can cut out the fuse holder and straight wire the circuit?  If something does happen, be sure to cover up the evidence so you don't lose your insurance coverage?  Oh, I forgot, you don't have insurance (don't need it).