Niles SI-2150 Class D Amplifier Teardown

[KEW]

Yes, appear different, and no I don't know the information on what it's based on. They don't seem to perform the same in the respective implementation. Nad is also known to sometime customise Hypex modules to their needs, and sometime use them stock.

Yes, I see in Amir's review the NAD C268 where he mentions that NAD says it is a custom version made for them!

Niles claims:

• cutting-edge digital power supplies (one for each channel to eliminate crosstalk)

I expected to see dual transformers, but it looks like it is dual Hypex modules instead?!

 

[wwenze]

These NAD Hypex units do not appear to be the same as in the Niles photo above. Are you sure the NAD units use two UC250LP-M OEM amplifier modules from Hypex (it is clearly a Hypex UcD module, but looks very different and there only appears to be one module in each of the NADs):


NAD c268

NAD c368

Wait... blue-colored -ve terminals?

Ready Player Two movie confirmed

 

[StefaanE]

1978 and Pascal here. The good thing about the 1 hour turnaround is that it matched cadence of lectures. You could grab your printout and card deck, check the output, go to the express 3 cards or less card punches, correct the error (you hoped) sling the deck into the input box, and race off to the next lecture. Happy days.

When the terminal was a room . The year I entered University was one of the last a slide-rule was required (I still have it). Then came the HP-21, Texas Instruments SR-50 and the avalanche of cheaper Casio, Novus and other Commodore scientific calculators. I still remember a bunch of fellow Geology students sitting together passing an HP-21 around and marvelling at the number of digits and accuracy of the calculations. Happy days indeed.

 

[someone somewhere]

[QUOTE = "Puddingbuks, post: 518950, member: 16491"] Не могли бы вы объяснить различия? [/ QUOTE]

 

[KEW]

[QUOTE = "Puddingbuks, post: 518950, member: 16491"] Не могли бы вы объяснить различия? [/ QUOTE]

Damn! The module part number appears to be just behind the two tiny caps on this end of the module. You can see where it starts with UcD1... where the "..." part is hidden behind the cap.
But congrats on getting that close! I gave up after spending too much time hunting an image like this!
Your web-fu is strong!

 

[boXem]

Damn! The module part number appears to be just behind the two tiny caps on this end of the module. You can see where it starts with UcD1... where the "..." part is hidden behind the cap.
But congrats on getting that close! I gave up after spending too much time hunting an image like this!
Your web-fu is strong!

Ucd102 OEM

 

[KEW]

I just reviewed the Niles SI-2150 amplifier. This is a quick teardown of the same.

Here is the main entire amplifier in one shot:

View attachment 83687

General construction seems fine.

The heart of the system are the two UC250LP-M OEM amplifier modules from Hypex. An input stage allows variable gain (board in blue) and speaker protection relays.

As best as I can tell, that complicated switching power supply is by Niles as it matches the color scheme of the buffer board. Looking at the capacitors, we see that they are the chinese brand, Jianghai:

View attachment 83688

I can't get good information on them. They certainly are not a tier capacitor company but seems like a very big company producing capacitors. May be hard to replace them with other parts given the compact size required for the thin amplifier enclosure.

The Hypex modules use lower grade capacitors made by Samwah:
View attachment 83689

One nice thing about the modular nature of the Hypex amps is that should a fault develop in one channel, you can swap board and see if the problem is there or not.

That is all she wrote...


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As always, questions, comments, recommendations, etc. are welcome.

Don't laugh but I have run out of socks! Have not gone shopping since beginning of pandemic back in February. Now I have no choice but to buy some but need money. So unless you want me to review equipment barefoot, please donate what you can using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/

I took photos of the inside of the Niles SI-2100 for comparison purposes. They seem to have a lot in common:

 

[Billy Budapest]

These NAD Hypex units do not appear to be the same as in the Niles photo above. Are you sure the NAD units use two UC250LP-M OEM amplifier modules from Hypex (it is clearly a Hypex UcD module, but looks very different and there only appears to be one module in each of the NADs):


NAD c268

NAD c368

You realize that the above photos are actually the same photo only rotated 90 degrees?