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Quantum Science Audio light blue fuse; $71, what a bargain!

I wanted to start a new thread about the more affordable versions of these fuses. I don’t doubt that the higher end versions are amazing, but most of us aren’t very likely to be able to hear them for ourselves. Fortunately, pretty much anyone who is serious about building a musically enjoyable and engaging system can get a good taste of what they’re all about.


I’ve had the light blue QSA fuses ($71) in my CD transport and DAC for over two weeks, now. They replaced SR blue fuses, at around twice the price, and easily bettered them. I am expecting one more light blue tomorrow, to replace an SR orange in my amp. I’ll give an update on that, once I get it installed and listen.


Meanwhile, here are a couple quotes from my posts on the other thread:


“What I am hearing is; voices & instruments are more solid and lifelike, with increased natural detail and sense of space, better dynamics, and a more relaxed overall sound.”


“Just got in a second light blue fuse for my DAC. So far, more of the same improvements I got in my CD transport. Very nice!😃 One thing I appreciate is the break in seems to be pretty quick, without any of the nasties you get with some other stuff. Pop it in, and you’ll hear improvements in short order, at least that’s been my experience.”


I am continuing to greatly enjoy what these fuses bring to my system, and am really looking forward to getting the last one in my amp.


tommylion
willgolf
933 posts
 
Are the QSA fuses directional?  SR fuses supposedly are...it is interesting that when I put the SR orange in I just looked at them and put them in the way I thought they should go.  Maybe I was lucky that I did not put them in the wrong way.  I had 6 fuses to put in.
georgehifi's avatar
georgehifi
10,312 posts
 
I just looked at them and put them in the way I thought they should go. Maybe I was lucky that I did not put them in the wrong way.
You can’t, the mains is AC (Alternating Current, it changes direction 60 x a second) so it’s impossible to put the fuse in the wrong way!
Would be a different story if it were in the DC side of things inside the amp, then if it did sound different one way, it would be acting like a diode. And that would be a nasty thing for a fuse to do anyway. IT"S ALL SNAKE OIL!

Cheers George
tommylion OP
872 posts
 
I keep thinking of the dwarves in their dark shed, in C.S. Lewis' The Last Battle.
t_ramey
632 posts
 
I tried to go order another light blue from Tweek Geek and the site shows all fuses are now made to order. Must have sold out already. Sent Mike an email yesterday but haven’t heard back yet, he must be swamped.
andysf
268 posts
 
Al-Bīrūnī had little time for professional astrologers. In his treatise on astrological transits, he described al-Hasan ibn ‘Alī ibn ‘Abdūs as, “a non-studious listener,” noting that, “this is the case with most of the class of the astrologers; they bubble proudly about things they barely hear, without verifying them, and they are satisfied by associating fancies with them.”

In the spirit of Al-Birini, the great 11th century scientist, who stressed the value of direct observation, I have decided to buy one of these $71 fuses and experience their effects first hand.

About five years ago, I tried a HiFi Tuning fuse. That one had, without question, an audible effect on the performance of my phono pre amp. Unfortunately, it was an unpleasant effect, making the music sound overly bright and sharp. Hopefully this blue fuse will be better.




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