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Old 28th March 2013, 08:05 PM   #6661
3lviz is offline 3lviz  Finland
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Join Date: May 2009
About the "sound" and stuff (warning: easter wine content):

After buying nCores, I guess i am turning into a source-first guy. Once the speakers are properly placed, i always tune my source device if something does not sound right. The best thing with nCore is its transparency, it does not sound, so there is only one place left to blame, the source. And since i am all for computer based hifi and i don't mind turning a virtual knob for more pleasure, things like digital room correction and transient manipulation and what not, that makes me a very happy nCore owner. The nCore takes pretty much every, even smallest change and reproduces it faithfully. I can make it sound like pretty much anything. Many other amps have too much its own "sound" or limitations to do that.

I think that is what you get when you buy an nCore amp, potential. Thats all you get, but thats also all you need.
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Old 28th March 2013, 09:34 PM   #6662
tony399 is offline tony399  United Kingdom
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Join Date: Sep 2010
Location: Gloucestershire
Quote:
Originally Posted by 3lviz View Post
About the "sound" and stuff (warning: easter wine content):

After buying nCores, I guess i am turning into a source-first guy. Once the speakers are properly placed, i always tune my source device if something does not sound right. The best thing with nCore is its transparency, it does not sound, so there is only one place left to blame, the source. And since i am all for computer based hifi and i don't mind turning a virtual knob for more pleasure, things like digital room correction and transient manipulation and what not, that makes me a very happy nCore owner. The nCore takes pretty much every, even smallest change and reproduces it faithfully. I can make it sound like pretty much anything. Many other amps have too much its own "sound" or limitations to do that.

I think that is what you get when you buy an nCore amp, potential. Thats all you get, but thats also all you need.
Agreed, I have stopped looking at other amplifier designs myself.
Ncore may not be the 'best amplifier in the world' but it keeps me happy.

Unfortunately no Easter wine content here, some of us have to work tomorrow.
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Old 31st March 2013, 10:22 PM   #6663
mangew is offline mangew  Sweden
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Join Date: Dec 2002
Location: norrbotten
A question, some builders seems to ground the power supply to the silver fastening screw and some doesn´t.
An example of ground:
http://i612.photobucket.com/albums/t...an/Mockup3.jpg

Why do they ground the power supply like this?
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Old 1st April 2013, 12:56 AM   #6664
3lviz is offline 3lviz  Finland
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Join Date: May 2009
For some reason, some builders are not following the instructions in the data sheet. Totally beats me why.
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Old 1st April 2013, 01:03 AM   #6665
OllBoll is offline OllBoll  Sweden
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Join Date: Nov 2010
Quote:
Originally Posted by mangew View Post
A question, some builders seems to ground the power supply to the silver fastening screw and some doesn´t.
An example of ground:
http://i612.photobucket.com/albums/t...an/Mockup3.jpg

Why do they ground the power supply like this?
It's described in the PDF under "1 Safety precautions" that using a conductive spacer on the fourth SMPS600 pin improves EMI performance so I guess it makes sense to connect it if you want the best performance possible =)
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Old 1st April 2013, 09:31 AM   #6666
mangew is offline mangew  Sweden
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Location: norrbotten
Ok, a following up question.

Here are a picture as it seems to me a nice proper build, and here have the builder grounded the power supply with a wire directly to the ground on powersupply from the IEC inlet.
http://jamesromeyn.com/wp-content/up.../IMG_41171.jpg

I was thinkin to put a grounded wire from the IEC ground pin to one screw on the IEC and another wire from the powersupply (silver ground pin) to the other screw that fasten the IEC.

Is it better option to ground as shown in picture or the way i was thinking or it doesn´t matter?
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Old 1st April 2013, 10:15 AM   #6667
Julf is offline Julf  Europe
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Join Date: Oct 2011
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Quote:
Originally Posted by mangew View Post
Is it better option to ground as shown in picture or the way i was thinking or it doesn´t matter?
Depends. Why is it that you want to connect the mains earth (IEC ground) to the chassis and signal ground? For safety reasons?
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Old 1st April 2013, 11:22 AM   #6668
mangew is offline mangew  Sweden
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Join Date: Dec 2002
Location: norrbotten
Quote:
Originally Posted by Julf View Post
Depends. Why is it that you want to connect the mains earth (IEC ground) to the chassis and signal ground? For safety reasons?
As you probably understand from my questions, i am a completely n00b at this and want to connect/build my amps in best and proper way it could be built, as i do with other things i build.
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Old 1st April 2013, 11:39 AM   #6669
Julf is offline Julf  Europe
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Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by mangew View Post
As you probably understand from my questions, i am a completely n00b at this and want to connect/build my amps in best and proper way it could be built, as i do with other things i build.
The problem is that in most cases there is not one single "best and proper way". You always make trade-offs and compromises, and making the right decisions often require understanding the pros and cons.

From a sound quality point of view the "best" solution is probably not to connect mains earth at all, but if you do that, you'd better understand the safety implications (and be familiar with category II rules). Therefore I definitely recommend connecting the mains (safety) earth to the chassis.

As for optimal EMF suppression, you then have the conductive spacer directly connected to the chassis, and you don't want to create any extra ground loops. Thus, if you have a metal chassis / bottom plate, you should not use any additional earth connections from the conductive spacer. Just connect the IEC ground pin to the chassis with the shortest connection possible.

If your enclosure isn't made out of metal, then you have a more complicated situation, and might want to look at some sort of star grounding scheme.
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Old 2nd April 2013, 05:02 PM   #6670
Larsas is offline Larsas  Sweden
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Location: Stockholm
Default Excellent thread on grounding

Two good pages on grounding here, complete thread:

speaker terminals to chassis ground?
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