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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
872 posts
 
t_ramey,

It does seem like the red stones take at least a few days to settle in. I like what I’m hearing, but I’m trying to determine if, while certainly improving the frequencies they are targeted at, they are having any adverse effects on others? I’m thinking that, if your system is pretty neutral, or balanced, across the audible range, then all three types of stones might be the way to go. The next question is, do they play well together?

I have the reds on top of my power conditioner (CPT Equi=Core 300), figuring that way all my components will benefit, rather than just one.
senza
80 posts
 
I have a yellow in the preamp. I had a VTL fuse that was installed during a repair by the importer’s technician and it sounded good ( note that my pre is Air Tight ATE2).
After maybe 30 hours the system is singing better every day. At first the sound was better, more bass etc. It was good but not a knock out.

After a few hours I thought I was used to the sound and not much changes in sound appeared. 

After a while it really began to sing. 

Don’t know if it will continue and when the sound quality will stabilize.
Very very happy with this fuse. Expensive but worth every penny.
tyray's avatar
tyray
562 posts
 
Does the Quantum Science Audio light blue fuse or the more expensive ones work on solid state amps? I specifically have a Clayton S40 amp which requires three.  
millercarbon's avatar
millercarbon
12,531 posts
 
One of the three will be incoming AC for the whole amp. Try that one first. 
grannyring's avatar
grannyring
6,438 posts
 
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.
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