2. amps-preamps
  3. 1448317474

Synergistic Red Fuse ...

I installed a SR RED Quantum fuse in my ARC REF-3 preamp a few days ago, replacing an older high end fuse. Uhh ... for a hundred bucks, this little baby is well worth the cost. There was an immediate improvement upon installation, but now that its broken in (yes, no kidding), its quite remarkable. A tightening of the focus, a more solid image, and most important of all for my tastes, a deeper appreciation for the organic sound of the instruments. Damn! ... cellos sound great! Much improved attack on pianos. More humanistic on vocals. Bowed bass goes down forever. Next move? .... I'm doing the entire system with these fuses. One at a time though just to gauge the improvement in each piece of equipment. The REF-75se comes next. I'll report the results as the progression takes place. Stay tuned ...

Any comments from anyone else who has tried these fuses?
128x128oregonpapa
jond's avatar
jond
3,400 posts
 
Was reading about fuses and pulled out the fuse in my preamp but it was very hard to read, it definitely said 6.3A on one side the other side was much harder to make out but pretty sure it said 250ma. Do these numbers together make sense? Also how can I tell if the fuse is fast or slow blow? Sorry for the neophyte questions just never really looked at fuses before. Thanks!
charles1dad's avatar
charles1dad
6,996 posts
 
Hi Jond,
6.3 amps is a very large value for a preamplifier  (must have a huge power supply ). My gut feeling would be slo blo. Are you able to get in touch with the manufacturer to answer your question?  
Charles, 
jond's avatar
jond
3,400 posts
 
@charles1dad  I certainly can contact them in the meantime took another look and its F6.3A on one side and 250ma on the other. Guessing the F is for fast blow but the numbers are what's confusing me as 6.3A and 250ma are totally different values are they not? I may be misreading the 250ma part the engraving is incredibly hard to make out its a .75 inch fuse. Thanks.
almarg's avatar
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almarg
8,673 posts
 
Hi Jon,

It’s most probably a 6.3 amp 250 volt ("250v" rather than "250ma") fast blow fuse, in the common 5 x 20 mm size (the smaller of the two physical sizes SR offers, the other being 6.3 x 32 mm). If the internal filament is a straight piece of wire, rather than a spiral coil or a flat conductor having substantial width, that would provide added confidence in my assumption.

Good luck. Regards,
-- Al

jond's avatar
jond
3,400 posts
 
Aha Al that makes perfect sense as I could make out the 250 and was just guessing ma but volt makes sense so that must be it and yes it is indeed a straight thin piece of wire. Thanks!
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