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
I am demo’ing a RED fuse in my Sorcer X 4... I will hold off on any detailed observations for now as it has not been 3 days yet. But, to my ears there is definitely break in...It was rolled off in the highs when I installed it...now the highs are coming in, but the overall "balance is not there yet. After I get a handle on what the fuse is "doing" - I will switch to the original fuse and do some comparisons...I have some thoughts already on what it is doing, but I am waiting until I am convinced it has "settled", which I don’t think it has. glory mentioned 175 hours. So, I will give it several more days.
@ david_ten

Yes, I swopped them back and forth a few time but I have tape on the back of my components to indicate the direction of fuses and the QSA was quite noticeable on install : )

Wig
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
@wig   Thanks. Eliminating differences due to on/off, component and cable movement/disconnection/reconnection, removal/reinsertion into the fuse holder, etc. is important.