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
Post removed 
Sometime some people will realise that by changing something somewhere in a component something could be better or worse but never be the same.
OK I wrote one post & deleted it . I have little or no doubt of @tommylion description. I have been as much a skeptic as anyone. But I’m not willing to guess about it like most of the naysayers. To know is to experience. So I tried an Oyaide R1 AC outlet @ $165. I felt rather foolish doing it but I needed an outlet anyway for my dedicated circuit. So, what the heck,, I’ve wasted $$ before and education costs $$$. I installed it & ran current through it for break in. When I turned on my stereo I heard a good difference for the better. I kinda felt embarrassed for even hearing it sound better. How can this be? Its just an AC outlet.
Then there is the story of the pumice stone under my CD player. Then power cords. Then the ridiculous pads under my equipment which made a BIg difference.
There are things that take place that I don’t understand. But just because I don’t understand it, does NOT make it any less real.
That said, I am somewhat troubled when I see a $2877 fuse. Funny though, I seem to understand a $$2.5 million Bugatti Veyron that requires a $40k tire change when needed. Bias is a funny thing that all men suffer.

Quantum Sciences Audio Fuse (tweekgeek.com)
I know at least a couple of you here have ordered the next step up yellow fuse, and I am very interested in hearing about your experiences. Also, if anyone has the entry level black version, please post as well.
Are you opening the cases on your equipment in order to replace the fuse?  Neither my amp, Hegel h590 or CD transport have access to any fuses from the outside.  Sorry if this seems like a novice question but I've never considered playing around with the insides of my stereo equipment before.