I’ve just installed the new linear power supply

Not so sure about that (if you take the DAC circuits out of the equation).
It could depend on the circuits & chip set used to send the received digital data/audio to the pass-through USB/Toshlink/Coax output I guess

BUT as far as I know, the DMP-A6 and DMP-A6 Master Edition are the same in that regard

 

because it has a DAC.
you don't want the DAC? Chose a plain streamer. (at least 2/3 of the A6's price is the DAC circuitry... you're throwing your money out of the window... if you like so, so do I)

 

Yes. If things are done properly, that is: the stream is clean from jitter (as most USB controllers are able to guarantee - please, leave coax and optical out, for now, OK?!?) any streamer should sound the same, as a streamer does just this: receives some data, and forwards it (buffered or not, it depends on both the sender and the receiver) without altering it. Here, please, do not start peeing out that "it's not true that bits are bits", as here we do not handle them, we just spit them out to whom is the job to interpret them.

 

I said 'could' - I sincerely doubt it though

 

Then, if you don't mind, please give me a list of plain streamers that do all the A6 does and with a nice display too and that support multichannel....of course for a lower price . I ask because I couldn't find it.

You see, the point is that you think that your perspective applies to everyone and by doing that you are probably missing what others want/need.....maybe it could be you are to quick in your judgements? Because as long as I am happy with what I buy, the last thing I do is throwing money out the windows.

 

Some audiophiles put special stones on top of their equipment and say it improves the sound. Some suspend their speaker cables off the floor and say it improves the sound. Others put special pucks under the feet of their equipment and swear it improves the sound. Some say fuses make a night and day difference. To each his own.

 

By the way...

I would like I had the idea and built this linear power supply.

The audiofools have their hands on the DMP-A6 an they would give me their money for nothing an I then could have chicks for free...


When I turn on DMP-A6, turn on my pre amp, turn on my amp, get the volume knob absolut to max and go down on my old knees to ly down on the floor putting my old ears next to my speakers I can hear........ nothing! Absolutely nothing!

What kind of noise should this LPS throw out of my system and what should it make better than the genuine power supply in the DMP-A6?

Snakeoil at it`s best.

Edit: OK! I should say snakeoil in my opinion. It is my opinion as long as one can explain it logical to me why it can improve anything...

 

The ones who feel it necessary to cry "snake oil" at every possible moment like dogs in heat, can't help themselves. Like dogs in heat, they try to boost their low self esteem with ignorant proclamations of their "superior intellect" not knowing what they don't know.

 

Man live and let live I hope we live in a (free world) he is paying for it

 

You are right; it's getting too far too technical for me to even try to follow. /s

 

Who are 'they'? we all have a right to enjoy our hobby as we please.

It's very arrogant to assume that one person's opinion is somehow superior.

 

And the ones that claim to hear a difference but fail to back it up with anything other than statements like "others hear it too" or "my system is very resolving" are what, the benchmark for self-control and rational thinking? At least one side has actual evidence backing them up.

I would agree if we were dealing with just opinions here but we aren't. We are dealing with the highly subjective (and often repeated as if it were fact even though science has proven otherwise) audiofool nonsense/snake oil/myths vs. what science actually shows. And to top it off the OP claims to be an engineer so he should know better.

 

I will try to move this thread back to intelligent discourse. First, OP, your comment about the difference in sound between the regular and master edition. Are you using the USB or SPDIF out when you make this comparison? Since the master edition has better clocks, I would think it could improve the SPDIF out, but not the USB out, since SPDIF uses the better clocks, whereas the USB relies on the DAC to reclock the USB and there are no differences in hte USB out section according to Eversolo. When I used compared the USB out vs SPDIF to a SMSL SU-9 Pro DAC, I found the USB to be less dynamic than the SPDIF out and preferred the SPDIF. So far, I have never preferred USB out compared to SPDIF on anything. Second, when you replaced the power supply, did you use USB or SPDIF out? There is a lot of electrical noise from the computer part of the eversolo, so I am not sure the noise from the power supply is significant compared to the noise from the computer part.

 

IME and based on countless experiments and measurements if a PSU is competently designed a lot of what happens in digital and analogue circuitry comes down to PCB layout. You can use the best components money can buy but if your PCB layout is poor any potential gains made from improving PSU performance and using ultra high-quality components can easily be lost. Also any claimed performance improvements should be able to be measured. This is how I design and in some cases modify equipment. If you can't measure any improvement in any parameter then IME and IMHO you aren't going to hear or see it.

I'm not saying or even implying the LPS isn't going to make a difference. It might well do. I haven't yet read any published measured performance differences between the standard SMPS and the LPS, just subjective impressions, mainly from those dealers offering the LPS to their customers. A point to note. Once noise and distortion figures get to ridiculously low levels they fall well below that of human hearing / perception. Albeit the LPS has a lower noise output (claimed to be better than x10 lower), this doesn't always automatically translate into a proportional reduction in noise at the output of the rest of the electronics in a piece of equipment. If the existing electronics already has an impressive power supply noise rejection ratio then there's a chance that lowering the output noise level of the PSU by a factor of 10 won't automatically translate into the same proportional reduction in measurable noise or distortion at the audio output sockets.

This morning I revisited the webpage of the LPS LPS for eversolo DMP-A6 | Beatechnik and there's no mention or claim that installing the LPS makes any audible improvement over the existing factory installed SMPS in the DMP-A6. Yes there are two screen shots comparing the noise levels from both PSUs but the images are that small you can't read the detail as to how these measurements were made. There are many ways to measure PSU noise performance and I can tell you that you can get extremely conflicting results depending on the measurement technique and the settings on your test equipment. For context and to make my point crystal clear - I'm not suggesting that Beatechnik have falsified their test results or attempted to mislead prospective buyers of their LPS for the eversolo DMP-A6 but I don't see any point in publishing illegible screenshots of test results.

I also recently viewed a video on YouTube from an eversolo dealer that was selling three upgrades for the DMP-A6. None of which was the Beatechnik LPS. They were a new power cable, a fuse and some isolation pucks you installed under the feet of your DMP-A6. All claiming to make "night and day" differences but with absolutely nothing to back up the claims except their say so.

 

for reference (source):

Eversolo DMP-A6 Switching Power Supply:
Test Equipment: Audio Precision APx525
Load: 1 ampere
Noise Level: 679.2 uVrms


Beatechnik LPS-A6
Test Equipment: Audio Precision APx525
Load: 1 ampere
Noise Level: 56.68 uVrms

 

The mainboard of DMP-A6 is designed with an ultra-low ripple filter circuit that can reduce power supply noise to 2.228uVrms

 

Hhmm. Maybe noise reduced to 2.228uVrms sounds as minimal. I do agree with that but in practice I must admit that I can hear the difference of crystals used with Standard versus Master editions which is even a lot smaller mathematically. Never though that was possible from a simple engineering standpoint of view but our ears work in strange ways.

Now for influence of improved PSU stability using an External DAC. It then all depends on the design of that External DAC. If it has a buffering input stage using XMOS or equivalent with internal femto clock circuitry plus LPS then is should not make a difference. If it runs on the USB received clock though matters are entirely different and I can imagine a good LPS to make a perceivable difference. The same via HDMI as also that clock varies with the voltage applied as small as these may seem to be as we talk 10 exp−15 variations which we apparently still can hear to my amazing and initial disbelieve.

So using femtoclocks the PSU in fact may be the weakest factor in the link after all. Tried Linear PSU's with standard class oscillators on the motherboard of media players and could not hear any improvement which is not that strange. It is all about the weakest component in the total chain which it isn't in that case. The kc001 kindly provided figures may indeed explain an audible improvement after all.

I just ordered this Linear PSU myself to be used with my Standard/Silver edition. It won't harm for sure and will share my own experience here.

 

When we talk about something what may be hearable or not and sound improvement I have a question.
I use DMP-A6 as streamer to external dac RME Adi-2 DAC FS via COAX. RME provides BIT TEST to check signal and path.
When checking with BIT TEST and all test passed as OK then one can be sure that there is nothing what change the original signal. Right?
Why should one then change a power supply for 280 $ when zero is zero and one is one and it comes delivered as sent?

Treat me like an idiot, I don`t understand it...