It would be easy to think that Purifi and Hypex are competing with each other. The reality is they share the same founders, investors, and technical leads. Those same people also created NAD and Lyngdorf and Kii among other things.
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Hypex Announces New and Improved NCOREx Class-D Amplifier Technology
Waxx
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It's not really like that, but there are close links to all those companies, as all are spinoffs of older companies by former employee's and Bruno Putzeys is always active in one or an other role. But Hypex (NL) was founded by Jan-Peter van Amerongen (Philips) where Bruno Putzeys was only a employee.
Purifi (Denmark) is founded by Bruno Putzeys (Philips/Hypex), Claus Neesgaard (TI), Lars Ribo (TI) and Peter Lyngdorf (NAD).
Kii audio (BE/GER) is close related with Purifi trough Bruno Putzeys, but the other partners are Chris Reichardt (AVID/SSL/Grimm) and Bart van der Laan (Hypex).
They are all related, but not the same, and not owned by the same people. It's just that in northern western europe there is a lot of research and development of higher quality audio, by those, and by others like Genelec, Scanspeak, Seas and SB Acoustics for instance...
NAD is not realy related, as it was founded in in 1972 by dr. Martin L. Borish in the UK, and was sold numerous times, now owned by a Canadian holding. Peter Lyngdorf worked there for a while, and they are OEM customers of Hypex and Purifi, but that's it concerning being linked to Purifi & Co.
As a customer from both companies, I can assure you that they are competing with each other and do no share anything.
Obviously they compete in the marketplace, and they don’t share intellectual property. But they do share an intellectual and financial family tree, one that has been brilliantly successful for all of us who care about audio.
Sokel
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Funny thing is that if Hypex stop selling PSs there would be no way to power Purifi's (unless someone buy Micro Audio or Connex,etc)
Waxx
Major Contributor
That PSU is build by Bruno Putzeys, when he worked for Hypex. It should be that he doesn't feel the need to redo it, but i'm sure he could. He makes SMPS's for a lot of companies, even high voltage SMPS's for tube (pre)amps like the modern Manley Labs ones... It was his first specialisation.
Review is posted. 
Now that the review is posted, can share how I verified the build prior to shipping to Amir and how that compares to his measurements. The review thread has gotten long and has strayed off-topic, so thought I would post here.
Here is SINAD measurement at 5W and 4 ohms...
So given the higher noise floor for my test rig, my SINAD is around 95 dB. My best case (loopback) for the QA401 is around 102 dB. If you check, Amir's AP measured a SINAD of 106 dB. On to how it fares under a wider range of power...
At 4 ohms, Amir measured the max power at 437 watts. That coincides with where my measurement hits the 1% mark. As you can see, my rig does not show the rise in distortion that Amir's AP showed. If it had, would have worked with Hypex to resolve before shipping to Amir. Hypex has taken note and we are currently discussing how to diagnose the issue.
p.s. as posted in the review thread, the major issue was a loose connection on Amir’s dummy load. So, makes sense as to why it did not show in my measurements.
Here is SINAD measurement at 5W and 4 ohms...
So given the higher noise floor for my test rig, my SINAD is around 95 dB. My best case (loopback) for the QA401 is around 102 dB. If you check, Amir's AP measured a SINAD of 106 dB. On to how it fares under a wider range of power...
At 4 ohms, Amir measured the max power at 437 watts. That coincides with where my measurement hits the 1% mark. As you can see, my rig does not show the rise in distortion that Amir's AP showed. If it had, would have worked with Hypex to resolve before shipping to Amir. Hypex has taken note and we are currently discussing how to diagnose the issue.
p.s. as posted in the review thread, the major issue was a loose connection on Amir’s dummy load. So, makes sense as to why it did not show in my measurements.
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In case anyone missed, as part of the review unit build, Hypex had sent the instructions for upgrading an existing NC500 eval board. There are posted here… https://www.audiosciencereview.com/...-ncx500-class-d-amplifier-review.41007/page-5
I would refer you back to Amir’s review as am not able to match his results. I suspect this has something to do with power handling for my dummy load. My QA451 dummy load is not intended for more than about 300 watts. I can measure with some external power resistors, but not really worth the time as the Amir’s results are close to the Hypex specs. Continuous power is even more work as Hypex only specs that it is dependent on thermal implementation.
While the review unit reflects a typical case, it could be better. The thermals could also be aided by an external fan too. As I mentioned in that scenario, ambient conditions will determine how much the fan runs. I regret this answer may not be exacting but the conditions do matter. Since conditions matter, if you have some specific ones, might be able to test. Currently, I would need to build one to test too.
Vacceo
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It´s absolutely fine, don´t worry. Makes me think what would happen if the amp modules were treated like the GPU of my PC: with a cold plate and a water loop.I would refer you back to Amir’s review as am not able to match his results. I suspect this has something to do with power handling for my dummy load. My QA451 dummy load is not intended for more than about 300 watts. I can measure with some external power resistors, but not really worth the time as the Amir’s results are close to the Hypex specs. Continuous power is even more work as Hypex only specs that it is dependent on thermal implementation.
While the review unit reflects a typical case, it could be better. The thermals could also be aided by an external fan too. As I mentioned in that scenario, ambient conditions will determine how much the fan runs. I regret this answer may not be exacting but the conditions do matter. Since conditions matter, if you have some specific ones, might be able to test. Currently, I would need to build one to test too.
700 Watts is such a massive amount of power that it means virtually any home speaker will have plenty of power to work up till wrecking itself or your ears, whatever happens first.
Thanks!
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It's the first OEM NCx500, AFAIK
If you are jumpering out the buffer to get better noise performance, might want to label the amp. Was redoing my subwoofer amplification with a minidsp. Ended up wasting an hour troubleshooting the minidsp and the realized I had grabbed an amp with the buffer disabled. 
Anyone with practical experience so far?
Regarding?
Quality of case, any issues like loose items etc.,
And I still don’t get it, why even Nilai mono amps DIY comes with a power unit resulting in lesser output power (700 v 500 watts at 4 ohm)?
I used a Ghent NC500 case for my NCoreX. Have only minor complaints about their cases. Ghent is the go to answer for Purifi as has standard offerings for board-mounted connecters.
Not sure what you mean about the Nilia specs, but wrong thread for your Nilia question.
Any idea when NCx1200 and NCx2k will be released ?
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