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Old 9th October 2012, 05:26 PM   #5141
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But what if you got one of them super duper Ultra Tweeters that operate in the GHz band?

Golden Sound
(scroll down to Ultra Tweeters)

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Old 9th October 2012, 05:38 PM   #5142
ds23man is offline ds23man  Netherlands
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But high frequency content in Hires material can introduce some "nice" side effects in IM distortion......

In this link more on this and why hires as a container format "sucks"

24/192 Music Downloads are Very Silly Indeed
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Old 9th October 2012, 05:48 PM   #5143
Julf is offline Julf  Europe
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Quote:
Originally Posted by StigErik View Post
But what if you got one of them super duper Ultra Tweeters that operate in the GHz band?
"Ultra Tweeter's principle of operation is very unconventional"
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Old 9th October 2012, 05:50 PM   #5144
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Default nCore build tech ?

Hi folks, I have a build question. If one were going to build an nCore stereo amplifier in a non-metallic case would the following be the correct way to arrange the various grounds:

create a single ground point within the case, and then route the following to it:

1. The ground standoff on the SMPS600s
2. Pin 1 from both XLRs
3. Nampon, via a switch for standby mode
4. Shield connection on the input harness to the nCore modules

AC ground will not be connected.
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Old 9th October 2012, 06:01 PM   #5145
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Quote:
Originally Posted by StigErik View Post
But what if you got one of them super duper Ultra Tweeters that operate in the GHz band?

Golden Sound
(scroll down to Ultra Tweeters)

Interesting product StigErik.
But what is your point?

They donīt mention harmonics in the above 100kHz band but a wave-propagation-effect caused by HF carrier frequencies. Belive it or not, but this is a well known acoustic effect

To the "above 22kHz cannot matter" argument. I get that it can be difficult to understand that super sonics can have an audible effect. Exactly why it has is still debated. Had you ever tested cables with inductances and capacitances that "should only" have affects in the super audio register, my guess is that you would see things differently. It DOES sound different no matter the known limits of human hearing and source material. Equipment probably adds harmonics of their own, though not as desirable.

Why? -most likely because these super audio effects have some effect down in the audible register. Theoretically you can argue against, but that would be to define the phenomenon according the some theory picked out of the blue instead of asking why this is audible.

Rest in peace with it
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Old 9th October 2012, 06:34 PM   #5146
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There is nothing to hear above 20 kHz. That was my point. The Ultra Tweeters product is bogus, simple as that.
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Old 9th October 2012, 07:45 PM   #5147
redjr is offline redjr  United States
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Quote:
Originally Posted by barrows View Post
Hi folks, I have a build question. If one were going to build an nCore stereo amplifier in a non-metallic case would the following be the correct way to arrange the various grounds:

create a single ground point within the case, and then route the following to it:

1. The ground standoff on the SMPS600s
2. Pin 1 from both XLRs
3. Nampon, via a switch for standby mode
4. Shield connection on the input harness to the nCore modules

AC ground will not be connected.
Wouldn't you want to connect everything to physical earth (PE) ground at some point? Otherwise, you have a floating ground situation with no path to PE should the hot side of the AC short internally. I know it's not likely, but that's what PE is for - the unlikely. What about the PSU having some sort of catastrophic failure without the internal fuse (if there's one) breaking?
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Old 9th October 2012, 07:54 PM   #5148
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Default Well...

Quote:
Originally Posted by redjr View Post
Wouldn't you want to connect everything to physical earth (PE) ground at some point? Otherwise, you have a floating ground situation with no path to PE should the hot side of the AC short internally. I know it's not likely, but that's what PE is for - the unlikely. What about the PSU having some sort of catastrophic failure without the internal fuse (if there's one) breaking?
It is my preference to follow Class 2 construction standards, and not connect the AC ground. Hypex also recommends this approach in the nC400 literature. The SMPS600 is protected from catastorphic failure by a fuse. And I will be sure that the wiring is secure. Additionally, with a non-metallic enclosure, there is much less risk of shorts if a wire did fail somehow.
There are quite a few commercial high end audio companies, using metal enclosures even, who do not connect the AC ground at all.
In any case this is my choice... and I fully understand the potential risks. Remember, I am talking about a non-conductive enclosure here.

No answers to my question?
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Old 9th October 2012, 07:57 PM   #5149
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While you are all discussing about higher harmonics above 20 KHz I'm enjoying my NCore's.
Now listing to the War Of The World SACD in multi-channel....

Yesterday a former colleague, who is also an audio enthusiast, came to listen to the NCore's and my XTZ Speakers. He was very impressed by the detailed bass of my setup.
We agreed that in the near future I'll take two of my NCore's to his house and do a comparison with his Moon Titan multi-channel amplifier. (Class D meets Class A)
The speakers will be TAF Royal Exalibur Mark II with EBS. Link Terrazzo Art Fidelity - products
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Old 9th October 2012, 08:16 PM   #5150
ChrisPa is offline ChrisPa  United Kingdom
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Quote:
Originally Posted by barrows View Post
No answers to my question?
Based on the hypex notes your proposal looks right
No mains earth in a class 2 as recommended by hypex/Bruno
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