Matias

I have no idea. They don't detail much with a "What's New" report. Better if you ask their customer service directly.

Any chance of enabling SoX upsampling for all DLNA inputs (JRiver)? Including SoX sample rates (input and target, maybe in a table format like JRiver), and SoX parameters (phase response, pass band %, stop band % and attenuation)? For example: foobar2000 has a free DSP called Resamper-V with a GUI to visualize those settings. If not the graphs, at least enable the user to tweak the parameters. PS: if I were you I would avoid MQA controversy and just call is "SoX upsampling".

To be honest I never noticed differences when upgrading the DAC's DSP or XMOS or whatever. I think they did improve stability and such, but audio quality, not that I have noticed. Or maybe I did not pay attention enough.

I think it more comparable with the Makua + NC252MP amp. Since I have a Makua with external NCore N500 amplifier, the Kula is like my system in an less powerful all-in-one version.

Interesting that they use a 300W module that is in between their regular MP series: 250W of the NC252MP and 500W of the NC502MP, all in 4 ohms.

Before and after recording of Isoacoustics Gaia feet with the Kii Three + BXT. https://youtu.be/k3ExWnCN5kU

Can't you use an USB to AES-EBU converter and keep the DAC202? Weiss INT204 for example. https://www.weiss.ch/products/int204

JRiver has both PEQ and Convolution for playback, I suppose other players too. Maybe you can measure with REW and create the EQ the first frequency range, add it to Equalizer APO, then measure again and create the second filter, add it to Equalizer APO as well, measure a 3rd time to check, if satisfied, than load both in the player?

New review by hifi-advice: https://www.hifi-advice.com/blog/review/digital-reviews/network-player-reviews/mola-mola-tambaqui/

JRiver MC server can process Convolution in a quite complicated way to set up, and local playback it works fine. Problem is that through the network to a DLNA renderer it loses gapless playback, which for me is a deal breaker and so annoying. I have reported this bug in JRiver forums and I have been ignored (again). So I am seriously thinking of spending the lifetime license (700 usd...) and switch to Roon, which apparently does this perfectly.

It does have a transformer.

Usually mechanical hum from the transformer is DC on the mains. Try one of these, buy from someone who allows returns if it does not solve. https://ifi-audio.com/products/dc-blocker/

Yet snake oil haters do this defamation every day on all social media and forums and noone cares. So why not expose an OEM company selling a 20 usd switch as a high end design? It is more transparency and ultimately customers win.

https://www.head-fi.org/threads/ifi-audio-ipower-x-the-official-thread.926656/post-16236813

Auto Ref is a mix of multiple gain stages and a little digital attenuation, so that SNR is kept always high. I don't think you need extra analog attenuators between the RME and the power amp imo.