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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
tommylion OP
874 posts
 
I have two of each (red, blue, clear), all on top of my CPT Equi=Core 300. I had the reds there for a few days, and added the blue & clear earlier today. I was really liking what the reds were doing, but with all three it seriously sounds like I have a new system. Improvements across the board, and not subtle at all.

I had listened to the reds for a few days, and they improved the upper bass and lower mids just like what it says on the Tweek Geek site. I then added the blues, and, sure enough, the upper mids and lower treble improved. I was going to wait a while to put in the clears, to get a handle on the reds and blues together, but I got impatient and threw on the clears. After they settled in a little bit, the highs got better and it all just came together wonderfully.
middlemass
936 posts
 
Would be interesting to hear how the stones compare to SR Devices...ECT, GCT, etc. Taking the cost difference completely out of the equation, which product is straight up better?
wig's avatar
wig
1,284 posts
 
Replaced my Audio Horizon fuse in my tube amp with a QSA light blue fuse and I immediately noticed the difference in clarity.

All of my components are now outfitted with QSA fuses!

Wig
millercarbon's avatar
millercarbon
12,531 posts
 
Really impressed with the Blue in my Blackhawk.
tommylion OP
874 posts
 
If you like what the fuses are doing, then the stones (all three varieties) are definitely worth trying. Here’s an interesting tidbit from the Tweek Geek site:

“QSA Stones are about 1.5" in diameter and about 1/4" high including the gem stone that sits on top. The stone itself is a brownish color, and the bottom is coated in a special noise absorbing material. This material can be seen painted onto their AC receptacles as well. The gem stones are also used on the upper tier outlets as well as the Red/Black fuses.”

It seems the stones use some of the same materials as the high end fuses and AC outlets. I’m thinking they’re maybe a way to get some of the benefits of the expensive stuff, on the cheap.
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