Fuse upgrades? -- 6.3 amp 250v 5X20mm fast blow fuses

Thanks for the insights, gents, much appreciated.  As you have noted, fuses blow for a reason, and I think in my case it has been due to poor connections with my interconnect cables and me fiddling with gear on rack.  I plead guilty!   I ordered some new bussman fuses as replacements and will ensure more firm connections with my cables to the gear.  Thanks again. 

Geoff,
Thanks for chiming in.  I will admit that Steve McCormack is a devotee of SR fuses and he knows audio gear. 

@whitestix SR hasn’t sold 30,000 fuses for no reason.

30k fuses, eh?

You’re makin’ me think I should go back and finally finish the fuse tech I was working on (tinkering with, off and on) for nearly a decade, and finally bring it to market.

Before we have a zealot coming in and reducing this thread to a troll fight, I will say that fuses are a way to tune your sound.  There's no right answer and I have actually used different fuses in different situations to "adjust" the sound.
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Such as, Furutech are probably the most neutral high resolution fuse.  However, too many Furutech in one device can make things too warm/slow.  If you have 4 fuses in the DNA, you probably have a single "Main A/C" fuse.  I would do the 4 fuses all Furutech and then keep the stock fuse for the Main A/C or look at faster alternatives.
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Hi-Fi Tuning Supreme is a silver/gold mixture and it is a much faster sound with faster attack and more detail.  However, it can easily push a system over the line into the "too fast/bright/harsh" area. 

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Isoclean or Hi-Fi Tuning Supreme "Cu" (copper).  These are gold-plated copper and can be used to make a system warmer sounding.
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There are others you can play with, but I haven't tested any of the other new offerings.