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 11 responses by grannyring

I have a light blue on order. Will compare to the SR Orange in my tube preamp. These fuses offer sonic advantages that me and my wife readily notice and enjoy. We will see about this new fuse manufacturer.
George does offer some very insightful posts on this forum. However, in the case of fuses I have to admit it is getting a tad old. I do get a chuckle out of his continual fuse posts. Post on George!
This is one area you seem to have a blind spot based on your comments and not trying them.

Recently built a new preamp, mostly my design and I know the sound well,  and adding an audiophile fuse certainly yielded sonic benefits over the common type of fuse (new).
I love it when competition drives innovation and we all benefit. Seems SR has some work to do to regain their top quality position in the growing high end fuse category.

I suspect the fuse category will continue to see innovation and that is exciting! 
Seems my order for the Blue is not in stock. It will take some time for some of us to get our fuses and report back. 
I own that Clayton amp. I modified mine and upgraded it pretty extensively with some guidance from Wilson the builder. Great guy!
That is a very special Pure Class A amp.  It responds well to fuse upgrades. Do all three if you can! If you can’t, start with the mains AC fuse as MC said.
I put the Light Blue fuse in my preamp yesterday and listened for a couple of hours. I did not like the sound as much. I then reversed the direction and everything fell into place beautifully. No doubt these fuses are directional. We could hear it immediately and by immediately I mean within 30 seconds of playing my first demo song.
The blue fuse replaced a stock fuse which was also new. The SQ improvement is just so obvious that anyone who cares could hear it after one song. Mids more fleshed out, stage is larger, sense of ease and natural flow improved. I like the Blue and will buy another for my dac.
Tyray, the fuse closest to the IEC is the AC fuse.  It should also be marked 5A AC fuse. 
This thread reminds us of just how little we know about audio gear and their potential! It also reminds us of how much more there is to learn. I can just image how great systems will sound in another 10-20 years.  
These fuses offer important SQ improvements helping us get so much more out of our systems.  SR has some work to do to match or surpass these new QSA fuses. I bet they manage to improve their product line as they fight to stay competitive.  I am sure they are still selling many fuses, but over time QSA will expand in audiophile awareness and sales.