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
I don’t know if I cam make it until these things burn in, I mean the music is just not enjoyable now with these blue fuses. I mean they are more open but bright as hell. I can’t listen to female vocals, they hurt my ears. 
jmphotography
From QSA website translated :

Wrong fuse direction it will too sound very harsh and bright with a rough overall quality. Sound is harder, brighter, thinner with much more hash.

Who else tried these fuses and what were their impressions?

The wrong fuse direction will make the sound sound very harsh and bright, and the overall quality is poor. The sound is harder, brighter, thinner, and more hashed.


Who else has tried these fuses and how are the sound effects?


The fuse is going in the right direction. Innuos has documentation on their website for direction of audiophile fuses. I tried it the other way just confirm and it did get worse. 
earlflynn-
Chuck please do tell where the fuse installs on the Blackhawk. 
? Coulda sworn you had one?!
May have jumped the gun but it sure looks to me like it is one of those where the fuse is incorporated into and directly below the IEC connector. There is no mention of a fuse at all in the Owner's Manual (pdf on-line) but the pictures look so exactly like that I didn't even bother to call and ask.