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 wig

@ david_ten

Yes, I swopped them back and forth a few time but I have tape on the back of my components to indicate the direction of fuses and the QSA was quite noticeable on install : )

Wig
Guys,

It's no competition, QSA light blue fuse easily beats my SR orange, blue, black and my Audio Horizon fuses in clarity and all dimensions; you hear it immediately and with no burn-in.

The difference is quite startling!


Yes, start with a blue fuse and you’ll be amazed; one fuse change is more noticeable than going from copper to silver interconnects but without any thinness...😁

Wig
I also had the 1260 contact enhancer on my SR orange and AH fuses and my QSA fuses untreated still sounded better on install; orient fuse the same direction as your SR fuse.

Wig
@ david_ten

You are spot-on! The SR had an advantage of 8+ months of use verses the first few seconds with the QSA; that's how long it took me to discern the differences...

Then the swopping began over a 3 hour period and just couldn't believe the level of clarity I was hearing. It's going to be a long haul to hit 200+ hours as my system is all tube based and typically listen 3-4 hours nightly. 😁


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