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 6 responses by jmphotography

I was about to pull the trigger yesterday on an Orange SR fuse. I bought my Innuos Zenith from Mike at Tweek Geek so I will call him today and get a couple blue ones for my Zenith and PrimaLuna EVO 400. 
Once  again another great thread quickly ruined by the "fuse hater"! OK, we get it, you know who you are, you hate the thought of audiophile fuse's and you hate the people that are interested in trying them. Great, we got your point, now move along, go take your hatred elsewhere, go start some political fights on Facebook with your friends if you have any, but leave us here who actually want to try experimenting with tweaks alone. Stop dragging these post down with your hatred. I for one am enjoying my new blue QSA fuse I installed in my Innuos Zenith last night. I think I might install the second one in my Primaluna tonight. 
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? 
Has anyone experienced a little harshness in the highs? I just put 2 blue QSA fuses in both my Innuos Zenith server/streamer and PrimaLuna EVO 400 integrated. I did notice more openness and greater separation and some dynamics. I listen to a lot of female vocals like Sarah Jarosz and Norah Jones and seem to get a little bit of shrill on the upper most notes. I have had them in about a week so they have maybe 15 hours on them.
I don’t know if I cam make it until these things burn in, I mean the music is just not enjoyable now with these blue fuses. I mean they are more open but bright as hell. I can’t listen to female vocals, they hurt my ears. 
The fuse is going in the right direction. Innuos has documentation on their website for direction of audiophile fuses. I tried it the other way just confirm and it did get worse.