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

Showing 10 responses by ozzy

So, has anyone bought any of the QSA outlets? It seems like a logical place to improve the system if the fuses do.

ozzy
Well I must say the one yellow fuse in my Lumin X1 does seem to provide a more detailed soundstage. But, this was not the case at least initially. I dunno, but it has improved quite a bit.
I used the 1260 contact enhancer on the fuse ends and perhaps that delayed or changed the fuse performance.

Looking forward to getting the yellows for my mono amps.

ozzy
Yes, I installed the yellow in the same direction as the SR orange.
Today, there does seem to be more information coming through. Hopefully it will continue to progress.

ozzy
Here is what I posted on the other thread.

So I received my first yellow fuse for my Dac.
First minutes of listening, its just ok. Actually, I don't think it is any better than my SR orange. But that fuse was treated with the High Fidelity 1260 contact enhancer. And perhaps I was expecting more based on all the chatter.
I have 2 more yellows to receive for my amps, so we shall see.

UPDATE: Now, a day later still no great revelation in sound quality.

ozzy
willgolf,
I just ordered a yellow fuse for my Lumin X1. It will replace the Synergistic orange fuse.

I'll post my findings.

ozzy
lemonhaze,
Sorry no I didn't.  Are you saying you have done this and it works well?
It seems like clever tweakers could install a high end breaker in place of the fuse.

ozzy
I wonder if anyone has ever tried a copper slug or a thick copper or silver wire instead of a fuse. I know it provides no protection, but I wonder about sound quality?

ozzy
I just received 2 more yellows for my tube amps. I also applied some of the HF 1260 contact enhancer on the ends.
As with the first yellow, I don’t detect much improvement during the 1st hour, so hopefully things improve as before.

ozzy