NuprimeX H16-AES 'first light' mini-review.
I recently received one of the NuprimeX H16-AES devices.
After some 'not so accurate' software upgrade instructions, it managed to find the file and upgrade (via USB stick, and have to remove the cover to access) more or less by itself.
Operationally, I'm only interested in Atmos (and other surround formats) decoding to AES for my OktoDAC8, for 8 surround channels.
(I do mains EQ and bi-amp xovers with a Flex analog on the Okto outputs.)
And, I'm happy to say it works exactly as expected:
- I can switch the OktoDAC inputs from USB (PC files) to AES (movies from Apple TV or Oppo BR player) 'on the fly' from the remote. Nice.
- Confirmed - current release of OktoDAC software provides AES volume control via Knob or Remote. A major convenience.
- Nuprime software (for my use case, 7.1) seems stable and works well (the 'as shipped' software was unlistenable, with crackling and noise randomly on all channels!)
- It has many more features than I have any interest in, but comes with a microphone and specific input for it, too.
- It was well packaged, in a 'briefcase style' outer box with a well cradled inner box w/ foam protection, and has a nice weight to it...though most of that is just the case, as there are only a few small boards inside

Presentation of the product was quite good, happily.
- Finding the right DB25-AES cable, for under $200 (I don't need all 16 outputs!) was a pain, but I found an 'imperfect' one on eby for much cheaper, and it works fine but needs some touch ups. (Also found a DB25 connector with solderless connections which I will convert to, eventually.)
- Atmos (finally!) is properly 'rendered' when its e-arc is plugged in to a recent Hisense TV.
- Pleasant surprise is that the OktoDAC display accurately reflects how many channels a particular source is sending - something that with a PC/USB/JRiver input never varied b/c I have it set to always convert to 7.1).
- That display was very helpful in confirming that the original software was truly faulty, as the Okto display reflected flickering outputs and varied channels being activated...lots of blinking.
How on earth Nuprime released such defective software (it took two or three releases to get it to work?) is disturbing, but it looks like they finally got it right, at least for my use case.
NEXT STEPS - Video.
My system uses an old Sony projector, via a set of wireless adaptors (took a lot of experiementation), which I haven't even
tried to get working with the Nuprime unit - yet.
So, I'll be
searching for an affordable ultra short throw (UST) projector that passes Atmos 8 channels, which so far has eluded me....and it takes a LOT of digging to determine which USTs
actually support 8 or more channel Atmos via earc.
Rtngs.com does provide that info on tested devices, but they've only tested a small number of USTs, and of course now you have to pay to see those details
UST Suggestions would be appreciated, but I'm trying to keep my projector purchase to under $1500, so also looking at slightly older used USTs, as well.
(The newer Hisense USTs support it, but are out of my price range so far.)
(UST will allow me to move the projector under the 'screen' and so can hard wire it directly to the Nuprime HDMI/ e-arc and won't need to hang from the ceiling and use wireless to it)
EXPERIENCE - so far:
The sound quality is
excellent, and a
very noticeable improvement from the Oppo103/analog > ADC/USB -> PC/JRiver, which had a pretty low SN/DR...not to mention Atmos decoding as well.
The dynamic range improvement, in particular, is dramatic. Sound effects in movies can be really terrifying now

There is also a gain difference between PC USB and Nuprimve AES inputs, which I have not tracked down yet, but it's pretty noticeable, having to 'dial back' the AES inputs by around 10db to match Okto output levels between AES and USB. Not hard to fix, of course.
So, I now have a PC 'hybrid' based AV system, with PC/USB for very hi-res audio files via OktoDAC8, and nearly Hi-res streaming/Bluray/Atmos via Nuprime AES -> OktoDAC for movies or Apple Music (which I'm still struggling to get used to, but their classical selection, including surround, is pretty good.)
Holy Grail, partly met. OktoDAC8 for the Win!
Many thanks to all those who have reported on these (Atmos) challenges before.