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Class D Switching Power Amplifiers and Power D/A conversion

Hypex nCore NC122MP grey sounding
Hypex nCore NC122MP grey sounding
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Old 23rd January 2019, 08:16 PM   #21
Khron is offline Khron  Finland
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Because "pro audio" = "bad" sound? And/or "fancy" audio gear "needs" to use overpriced and overbuilt RCA connectors, instead of anyhing as "pedestrian" and technically functional as XLR's?

Just speculating here...


Quote:
Originally Posted by Windforce85 View Post
Running mains, small signal and output untwisted and unshielded wires atop of the switching amplifier stages is not so brilliant design. AES48 balanced interconnection routine is also avoided.Why there is still kind of resistance of not using balanced interconnection in differential-input amplifiers? Sound System Interconnection
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Old 23rd January 2019, 08:24 PM   #22
Windforce85 is offline Windforce85  Poland
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Sorry for OT but many modern pro audio rigs actually sounds ridiculously good (good mental excersise is to close the eyes and to forget that we are listening to 'pro' gear) and could easily put fancy audiophile stuff into shame outperforming it not only in shear loudness but also in clarity, imaging and tonal balance. This 'amp box' isn't the exception. Bad implementation will make even famous NCore sound like a crap.

Last edited by Windforce85; 23rd January 2019 at 08:27 PM.
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Old 14th February 2019, 05:12 PM   #23
aw1delft is offline aw1delft  Netherlands
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Quote:
Originally Posted by Windforce85 View Post
Running mains, small signal and output untwisted and unshielded wires atop of the switching amplifier stages is not so brilliant design. AES48 balanced interconnection routine is also avoided.Why there is still kind of resistance of not using balanced interconnection in differential-input amplifiers? Sound System Interconnection

Both wiring faults should be easily modded, I guess? Going to buy one anyways
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Old 14th February 2019, 09:07 PM   #24
Reactance is offline Reactance  South Africa
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Dear all,
I had to use my warmest cable, a vd Hul MC gold, to tame it a little.
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Old 15th February 2019, 02:37 PM   #25
Veeren is offline Veeren  Portugal
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Default Hypex nCore NC122MP grey sounding

Hello aw1delft,

I am very curious about your experiences!
Let us know what you are going to do and what the result is.
Am also interested in what kind of equipment you are going to hang on.

The wiring of this amp is certainly not OK.
In connection with the exchange and money back possibility, I have not made changes to the wiring.

I wish you a lot of listening pleasure.

Greeting,

Veeren


Hallo aw1delft,


Ik ben erg benieuwd naar je ervaringen!
Laat ons weten wat je gaat doen en wat het resultaat is.
Ben ook geïnteresseerd in wat voor apparatuur je er verder aan gaat hangen.


De bedrading van deze amp is zeker niet in orde.
In verband met de omruil en geld terug mogelijkheid heb ik veranderingen aan de bedrading niet gedaan.


Vast veel luisterplezier toegewenst.


Groet, Veeren
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Old 15th February 2019, 05:03 PM   #26
kees52 is offline kees52  Netherlands
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8 level is impressive Did design from kwown stuff on the internet, the postfeedback however needs extensive calculation to get fase correction for from low pass, I get 8 x carrier and is now 3 Mhz. can thus do with easy get 250 Khz bandwith. But if this do for audio never tried, the special feedback circuit do very oke when it is calculated on the used low pass.

doing rebuild mine home I have not much time for electronic on this moment, but it get's done soon.

regards
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Old 20th February 2019, 01:13 AM   #27
e_fortier is offline e_fortier  Canada
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Hypex nCore NC122MP grey sounding
Hi Veeren

I know that this amp doesn’t come with input caps.

Were some input caps added in the end product you purchased?

I’m also considering buying the amp module and put it in an enclosure. I recently bought an IcePower 300 series I really enjoy and I’d like to compare it w N-Core to see what the hype is all about.

BR
Eric
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Old 20th February 2019, 09:50 AM   #28
Veeren is offline Veeren  Portugal
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Hi Eric,


I don`t think a input cap was added to this amp module, be aware that this MP series is not a product you can buy as a module only as a complete amplifier.
Unless you are a amplifier maker .


BR
Veeren
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Old 22nd February 2019, 03:03 AM   #29
jgazal is offline jgazal  Brazil
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Question Thermal design and mains connection to the sps

I have a couple of questions regarding thermal design in MP OEM power supply and amplifiers combo.

Is there a metal plate underneath the PCB? Is it made from aluminum?

Are power transistors coupled to such bottom plate?

Then is such bottom plate coupled to the bottom of the amplifier chassis with thermal grease?

Where do I get the plastic connectors to attach the mains phase and neutral to the board?

I am afraid that after twisting them they are going to get too short to reach the IEC socket so I will need to build a new complete set of cable plus connectors anyway for the mains...
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Old 22nd February 2019, 04:25 AM   #30
cowanaudio is offline cowanaudio  Australia
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Hypex nCore NC122MP grey sounding
Quote:
Originally Posted by jgazal View Post
I have a couple of questions regarding thermal design in MP OEM power supply and amplifiers combo.

Is there a metal plate underneath the PCB?
Yes
Quote:
Originally Posted by jgazal View Post
Is it made from aluminum?
Yes
Quote:
Originally Posted by jgazal View Post
Are power transistors coupled to such bottom plate?
Yes
Quote:
Originally Posted by jgazal View Post
Then is such bottom plate coupled to the bottom of the amplifier chassis with thermal grease?
Not necessary. The contact area is huge and power dissipation is low.
Quote:
Originally Posted by jgazal View Post
Where do I get the plastic connectors to attach the mains phase and neutral to the board?
Element14 is where I get them. They are a common JST connector.
Quote:
Originally Posted by jgazal View Post
I am afraid that after twisting them they are going to get too short to reach the IEC socket so I will need to build a new complete set of cable plus connectors anyway for the mains...
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