Quantum Science Audio Thread

I purchased a 240:240 isolation transformer on a local audiophile trading site. 750W capacity

Yes, I believe this is the first intelligent thing you’ve said, as noise does not jump the gap of an isolation transformer, because primary and secondary areI believe air gap isolated from each other.

They’re only good for source equipment, as none are big enough for big amps. (You need rating of at least 20A)
Now say you’ve got 100w+ power amp on it, and you’ll be back in the dummy seats. As 750w is only 3amps, and you’ll see far more than that going into speakers with a sample/hold/scope, especially big dynamic peaks, I’ve seen 60amp peaks, and it’ll saturate the isolation tranny, and cause dynamic compression.

Couldn’t agree with you more George - causes significant dynamic compression on virtually alll power amps. Why it works with the Robertson is beyond my comprehension.

@kingbarbuda,

It is not.
https://www.thecableco.com/nano-particle-solution-1260.html

I just received my red QSA fuse today. I also applied the 1260 to the end caps.
First listen, definitely a sharper image than the yellow.

ozzy

ozzy ...

• "First listen, definitely a sharper image than the yellow."

That was my first impression when I replaced the SR Orange fuses with the QSA Yellow fuses. There definitely was more detail because of a perceived improvement in transparency. However, eventually, I went back to the SR Orange fuses in order to enjoy the music.

I’m looking forward to your assessment of the red fuse as it breaks in, Ozzy. There are a couple of A’goners getting ready to receive the QSA Violet fuses, and I’m looking forward to their assessments as well.

I’m very curious at this point how far up the QSA fuse line one would have to go in order to outperform the prototype fuses (price to be determined) I’m using now. The QSA Yellows certainly don’t do it at $213. Maybe the QSA Violet fuse at $711 might be the ticket. Or ... maybe the QSA Red fuse at $1422 will do the trick. We’ll see down the road.

At any rate, the improvements made by these aftermarket fuses boggles the mind, as do the prices. :-)

Frank