Using internal HD lowers sound quality

Well, not, because if you calculate a expetation bias, listening test is not valid unless at least 80% of people confirm it. You did not tell which dac and connection you use on your RS150

It has everything to do with a DAC because that is the place where sound originates. So, theoreticaly it is possible that a noise generated by hard drive introduces jitter in data transport, depending on connection you use. It is unikely, but possible. So, usually good DAC eliminates this jitter and there could be no difference to hear. If there is a difference, the DAC is to blame, not the transport. I any way, if there is a difference then it must be a noticable difference if we measure electrical properties of coax SPDIF signal propagating from the transport. So, maybe @ROSEHAN can measure this in order to put this debate to an end.

I used the Dac of the Rs150 b so no interference with any cable

A friend has a rs130 and makes the same observation (Dac Accuphase)

If only… One can only hope.

Blind ABX or all this talk is completely worthless.

On the contrary, if you are using internal DAC is easier for this problem to rise. It is alyways best to have different power supply for streamer and DAC instead of common power supply.

There is a very interesting story from mid nineties of past century which can be translated to the problem you are talking about. In one moment there was a conflict between audio production studios and CD pressing facilities where small independent productions accused pressing facilities that they stamp sub quality CDs for small independed productions and for big players they stamp better quality discs.

Problem was in the fact that all stamped CDs were numerically identical to the masters, but somehow producers and sound engeneers complained that the two does not sound the same. It should be impossible, but the complaints were serious and coming from serious names in the industry. So, CD pressing companies called help from the best problem solvers in the industry. The problem solvers did a comprehesive research which involved measurement and listening tests on two levels.

First level were random professionals and common audiphiles who evaluated difference between systems in their own systems. There were about a dozen of CDs which they need to evaluate. Second round were two “golden ears”, people evaluating high end products for most popular hifi magazines who were presented with two CDs which has the biggest difference (still they were identical numerically) according to first listening tests. . After they confirmed they can hear the difference between the two they started a blind test. The “golden ears” failed totally, picking the right CD (they had 50% chance to be right anyway) in 30% of the cases. So, listening to this and making a conclusion is very tricky and unreilable.

But, the investigators noticed a strange pattern in evaluating the CDs in first listening round. They found that this pattern depends on which kind of system listeners had. One group had CDPs with integrated DAC, another group had CDPs as transports, hooked to an external DAC. After investigating closely they come to conclusion that most of the CDPs with integrated DACs have a small leak from the physical CD mechanism over power supply to the analog side of integrated DAC. So, they gave a reccomandation to the manufacturers of CDPs to take bigger care in isolation between different sections of power supply chain.

It could be the same problem here. In order to bi sure you can always connect your streamer over optical connection to a good reclocking DAC. If a problem is eliminated on that way, and many people can confirm it then HiFI rose can easily implement a solution to the problem in their future products.

But remember, the quality of sound from digital transport vs integrated with DAC is not in the transport, it is in the DAC. So, because of said problem it is always the best to have a DAC on separate power supply from noisy computers or streamers and have them connected optically.

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Hello, sorry to have restarted the controversy. I just wanted to share my experience. I am sorry to see that Boris and Burle took the opportunity to try again to explain to us that our experiences are worthless compared to their technical explanations. Why waste so much time trying to convince others that they are wrong rather than letting everyone share their experience calmly?

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Can you please read properly what I wrote? Where I did explain that your expirience is wothless? I explained where the problem could be, how to diagnose it properly and how to solve it. What is wrong with that?

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Sigh… Because like most audiophiles you fail to understand the distinction between personal impressions due to psychological reasons and the shared physical reality that could be of value to someone other than yourself.

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For the ssd test, a person who does not have Hifirose noticed the phenomenon when I told him nothing, nothing more with an external Ssd.

But indeed those who talk about it best are those who do not have the device and who have not done the test, they are the scientists

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You must be that person who needs to stick a fork into the wall socket because obviously people who did not do that can’t tell you that it won’t end up well.

You’re right, people are all 5-week-old rabbits!!

I did not find neccesarry to tell everybody that I installed a hard drive in my Rose and did not hear any change. Ok, there is a theoretical possibility to have influence on internal DAC, but I do not think that Rose is so badly engeenered product.

Pretty much, really. It takes effort to actually learn stuff, and most do not have any desire to make it.

Exactly. But not noticing any nonexistent difference it’s not as much fun as pretending to be a goldenear :slight_smile:

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After noticing a significant improvement using an external SSD (Samsung SSD T7) instead of the internal SSD (Samsung SSD 870 EVO), I tried using an external HDD I had in stock (Toshiba Canvio Gaming). To my surprise, the sound improved even more, with a little less harshness and, above all, deeper bass. The difference isn’t as significant as switching from the internal SSD to the external SSD, but it’s still better. I’m a little skeptical because this HDD vibrates a lot (7200 rpm rotation speed), and I thought it would have degraded the sound.
I tried going back to the internal SSD several times because it’s more convenient to use, but the sound is definitely more aggressive. I would have preferred there to be no difference, but nothing helps.