USB high-speed isolators comparison tests

[carlmart]

Sorry, but audio science without listening is lacking.

All serious audio magazines included both things: objective and subjective comments.

 

[carlmart]

If anyone has a a linear supply around, not being used, say between 10V and 15V DC, can add a regulator such as this and have very good quality 5V output.

https://www.ebay.com/itm/LT1963-AC1...hash=item2879d3c730:m:mzT_qMbV17yVmlZee9DFkeA

The problem would be if the board fits inside the existing box.

 

[Blumlein 88]

In my experience, and a I have a good ear trained for a lifetime as audio engineer, even a resistor can affect things in a system which is transparent enough. In my line of work you could not imagine things, so you can repeat things over and over and always pinpoint things.

That is just training, anyone can do it.

So a power supply will certainly affect things. Please not the word: affect. That doesn't mean improve or worsen.

Sorry if I do not trust measurements very much when they do not show something you are clearly listening to. The ear is a very sensitive tool if you know how to do it.

I have a friend who makes very high quality speakers, so we are constantly making tests.

Describe the system transparent enough to hear a resistor change.

 

[carlmart]

In my case Luxman 5M21 power amp directly fed from Marantz CD player was one setup.

But better yet, read these articles by Martin Colloms and Ben Duncan.

https://www.diyaudio.com/forums/solid-state/128426-signal-path-resistor-quality-post1591161.html

Though if you are among those that believe that if it can't be measured it can't be heard, it would be no use to read them.

 

[solderdude]

Oh no ... not Martin Colloms

 

[carlmart]

Well, what about John Curl then? He's also a believer in the sound of resistors.

 

[Blumlein 88]

Well, what about John Curl then? He's also a believer in the sound of resistors.

Huh ...uh!

 

[Speedskater]

Sorry, but audio science without listening is lacking.
All serious audio magazines included both things: objective and subjective comments.

I can't think of any current magazines that do. While Stereophile does objective measurements, they don't do any ears only subjective comments.

 

[carlmart]

I can't think of any current magazines that do. While Stereophile does objective measurements, they don't do any ears only subjective comments.

Stereophile absolutely did, sometimes even did subjective tests only. Maybe they changed their ways lately.

In any way I think designers like Walt Jung, Erno Borbely, and many others did and do pay particular attention to audio quality, subjective wise.

 

[carlmart]

I just had a look at a power amp review at Stereophile, from a Power amp, and they do have subjective comments. Maybe you are not paying attention and do not care for that.

https://www.stereophile.com/content/dartzeel-nhb-468-monoblock-power-amplifier-page-2

Well, I do pay attention to both.

 

[carlmart]

Will this supply really be linear?

https://www.aliexpress.com/item/400...chweb0_0,searchweb201602_1,searchweb201603_55

 

[carlmart]

This is another more sophisticated 5V linear regulator that is reasonably priced, with a more economic shipping expense to Brazil.

https://www.aliexpress.com/item/32869469427.html

It's bulky, which I don't like, but it has two types output sockets, and the LT1085 regulator is a good one.

I am not sure about the transformer choices, which doubles the price on the Talema option, would bring what.

One thing that I miss in most of these boxes is a locking type socket. I know small size puts a limit to locking type connectors, but neither USB or those cylindrical connectors (which I never the know the name of) are good ones, securing wise.

There's a small space to add on the left to add Neutrik type speaker connector though.

 

[SIY]

I just had a look at a power amp review at Stereophile, from a Power amp, and they do have subjective comments.

Listening tests are important. Unfortunately, they do NOT do any sort of valid listening tests since those don't capture readers' imaginations and sell ad space.

 

[Willem]

Do we really have to read such unscientific babble?

 

[carlmart]

Do we really have to read such unscientific babble?

Which would be the unscientific babble? Subjective listening?

What about the claims, made by many serious audio electronics engineers, like Walt Jung or John Curl, on subjective listenings as important as measurings? Or that measurings do not tell all about how an equipment will sound?

Or how about some worst measuring equipment, like valve amplifiers, being preferred over lower distortion amplifiers for instance? Or similar things happening on transistorized equipment?

Or are you one of those that believe that amplifier have no sound of their own if specs are the same? If so you may keep thinking subjective listening is just babble, ignoring how things really sound like. The world has changed about, do you know?

 

[ryohnosuke]

Subjetive listenings just improve the profit of the audio market IMHO.

 

[SIY]

What about the claims, made by many serious audio electronics engineers, like Walt Jung or John Curl, on subjective listenings as important as measurings?

Curl (when he's not hyping scams, which he regularly does) claims that when he can't peek, he can't distinguish between components. That should be suggestive.

"If you can't hear it without peeking, you can't hear it. If you can hear it without peeking, you can hear it." I seem to say this a lot.

 

[SIY]

Subjetive listenings just improve the profit of the audio market IMHO.

We have to be careful to not conflate "subjective" with "totally uncontrolled." Subjective evaluation is critical, but only valid when done ears only.

 

[carlmart]

We have to be careful to not conflate "subjective" with "totally uncontrolled." Subjective evaluation is critical, but only valid when done ears only.

Of course, when made our tests we were pretty serious on how they were done.

 

[SIY]

Of course, when made our tests we were pretty serious on how they were done.

If they're not level matched and double blind, they're not serious.