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,

4 yellow will get you to Glory.

Had the orange SR outlet and gave it to my friend  without installing it 🥸
lalitk

I am looking forward to your report and review on HiFi Tuning vs. QSA fuses.

Happy Listening!
So I received my 2 blue QSA fuses over the weekend. I started with my Innuos Zenith, mostly since Innuos has nice documentation on audiophile fuse and what direction they should go. I had a nice improvement in openness and detail. Then I tried my PrimaLuna EVO 400 integrated. Its IEC fuse holder sits horizontally below the PC. It made a little improvement with overall transparency and openness. I tried it both ways and could not really tell a difference. I hate to keep turning the tubes on and off to test this, but I did not hear a difference in direction like I did with the Innuos. My system right now sounds a little shrill. Yes it sounds more open and slightly more detailed but I think it sounds more shrill. Will this change with burn-in on the fuse? 
JimP,

Yes it sounds more open and slightly more detailed but I think it sounds more shrill. Will this change with burn-in on the fuse?

Yes
@glory :approximately  how many hours will it need to burn in in your experience please ?
thanks