I do not suggest that, but slight improvement, measurable, but not hearable. would be better power source. RME has started to sell two models quite recently, but even MC from RME says, that while improvement is measurable, it is not hearable.

Another thing what one might change is to connect interface using optital and skip USB entirely. And avoid possible ground loops and like. Using optical would make devices galvanically separate. Something like RME Digiface USB would do the trick.

But as you do not have problems, you do not need it, really.

Better to "invest" to loudspeakers, and mainly room treatment. The room is mostly the weakest point in audiochain.

Yes. one could expand system in many ways. RME UCX II would be good choise.

But IMHO OP's question was about improving sound of what he has, not expanding it....

Sidenote. DF USB has also TM FX (but no DSP effects) and one may connect whatever will need in future. It has four in/out ADATs. I have connected two digital effect units and Octamic II.

Occasionally I hook up CD players and other old school analog stuff + analyzer. So routing and extensive I/O is nice. You can sum channels for subs etc.
If you are thinking of getting a Digiface I would much rather save some more for a UCXII. Digiface doesnt have DSP. If you dont need it specifically its pretty boring. You see I bought the Digiface before the UCXII which I shouldnt.
So TMfx, UCXII, ADI2-pro is just mighty fun.

"People have different needs and preferences. So, what fits you, may or may not fit others. UCX II is nice device, but it costs. Why would one buy it if he would have no use for most of its features?"

You asked so I shared my experience. About cost you should sum what you would spend on fancy cables and isolators

The AudioQuest Diamond USB cable costs from 770 Euro (0.75 m).
An UCX II should not be a problem.

Recommendation: @dgpuentes
The USB cable has absolutely no influence on the sound quality.
Please consider selling this useless cable and investing the money in something useful. Every mechanically well made USB cable for example from Sommer Cable or Lindy will be of higher quality.

I know the AudioQuest products very well (former dealer for many years - but I now see these things very differently).

OP is obviously a troll: they start a controversial topic hoping to initiate a flamed argument, and disappear themselves.

Good afternoon.

Sorry for not appearing on the Forum before.

Thank you all for your responses. We will try to assimilate all the information and investigate each option proposed to see if any of them seem reasonable to us to invest in.

My profile is not technical, I have always been fond of listening to music and I wanted to be able to do so in the domestic sphere in the best conditions that I could afford financially.
Over the course of five years I have been working hand in hand with one of my brothers and several friends, taking steps to complete the installation of the equipment. They are people with technical knowledge in this matter and without them I would not have been able to do it.

During this time we have worked on several aspects:
Dedicated power line.
Mains filters
Acoustic study of the room and treatment.
Investment in good components.
Equalization (something fundamental - you realize its importance when you have it available - here the purchase of the ADI 2/4 was essential)

Now that I consider that I have already reached the goal I was aiming for and I enjoy it every day, the doubts that you raised have arisen due to the influence of the friend who is a user of master clock and switches. He considers that in his case these elements have provided him with a substantial improvement in auditions.
I considered that in my case it would not be necessary but in view of the doubts, I decided to ask you. Although I am very satisfied with what I have, I am not closed to the option of improvement if this is possible.

There is little more I can say to you, only to reiterate my thanks for your help. If there is anything else you can suggest to me, I am all ears.

(By the way, buying the Audioquest USB is the only decision I have made on my own, without consulting my advisors, it is obvious that I am a disaster if left alone...

Regards.

"(By the way, buying the Audioquest USB is the only decision I have made on my own, without consulting my advisors, it is obvious that I am a disaster if left alone... sad"

I wouldnt be so hard on myself. I for certainely have my share of jewelery cable in a drawer somewhere, and possibly someone else here . Now I make my own cables from bulk studio cable. Its a philosophy, saving money for the bigger things. Not to chop it up and solving problems I didnt have. Bigger things will be like new speakers, Interface or a new TV. An actual component..

I dont mean to denigrate your project, but Id be careful about taking to many advice from to many people(audiophiles). Buying audiophile products is a jungle with lots of predators. Stay careful

Okay, I'll be very careful not to succumb to the "audiophile" influences that surround me...

This measurable improvement has never been published. It would be fair to see it.

There are measurements and charts in the manuals of RME DPS-2 and LNI-2 DC, regarding the quality of the DC output and de-coupling from the AC mains.

The ADI-2 is built with SMPS supply in mind, having their own optimized internal multi-voltage PSU’s and filterings built in.
So, all ADI-2 models themselves don‘t show any PSU-related disturbances, there‘s no room for direct improvements in this regard, which means no comparative measurements possible.

The interaction with other connected devices like power amps or active speakers, even with some planar magnetic and electrostatic headphones, is another story.
These can’t be quantified by measurements, as they are complex and highly configuration dependent.

But – there’s a simple rule:
If you don’t hear noise, you don’t have a noise problem.

Leakage mains currents/voltages can cause audible noise effects in certain configurations.
The new “soft ground” 3-prong SMPS delivered with ADI-2/4 Pro SE, NT-RME-11 / ATS-12040, (available separately too) already addresses the majority of those problems:

RME DPS-2 and LNI-2 DC even go some steps further.

Still, if noise creeps into the audio system from a USB connection, it usually needs to be addressed by using an USB-isolator:
https://forum.rme-audio.de/viewtopic.ph … 03#p223103
https://forum.rme-audio.de/viewtopic.ph … 09#p201609

Again: if you don’t hear noise, you don’t have a noise problem.