[RONJA MESCO]

This is a chunky boi

CHONK CHONK CHONK

 

[Max61MI]

CHONK CHONK CHONK

O.t.: About thirty years ago I had a Mercedes identical to the one of your avatar for about a year, 1971 Mercedes 300 SL 3000cc 200HP 6 cylinders, hydraulic suspension, but then after about a year I had to sell it because it cost too much to maintain...

 

[moonbst1]

I believe someone posted long time ago, The 05FS1 official power supply /w cooler comes with 12V2A AC adapter.
Just wondering 12V2A vs. 12V3A+, Is it true XD05 works as Class A mode when power is supplied higher than 3A ?

 

[ChangTan]

I believe someone posted long time ago, The 05FS1 official power supply /w cooler comes with 12V2A AC adapter.
Just wondering 12V2A vs. 12V3A+, Is it true XD05 works as Class A mode when power is supplied higher than 3A ?

the XD05Pro always works in Class A mode whether it is in Eco, Normal or Turbo with or without PSU.

 

[moonbst1]

the XD05Pro always works in Class A mode whether it is in Eco, Normal or Turbo with or without PSU.

Thanks good to know it. Do you mean those ECO / Normal / Turbo / Turbo + 12v2A / Turbo +13v3A+ are all the same sound quality, same output power. Right?

 

[9u775]

Thanks good to know it. Do you mean those ECO / Normal / Turbo / Turbo + 12v2A / Turbo +13v3A+ are all the same sound quality, same output power. Right?

I've tried it with a few PSUs I had laying around, up to 12V 4A and heard no difference in Turbo mode compared to a 12V 2A PSU.

When I saw that the official 05FS1 comes bundled with a 12V 2A SMPS I decided to settle on a spare 12V 2A PSU because it had a more supple cable and I don't want to stress the USB-C port.

 

[Max61MI]

Thanks good to know it. Do you mean those ECO / Normal / Turbo / Turbo + 12v2A / Turbo +13v3A+ are all the same sound quality, same output power. Right?

Absolutely not; the three levels correspond to as many output levels, with 3dB difference from each other (someone had published a graph in this thread showing the different output levels); each state change therefore corresponds to a doubling (or halving) of the output level.

In addition to this, in qualitative terms some of us also perceived a different dynamic behavior, and for this reason I prefer the turbo mode in any case; however, this could vary with the characteristics of the headphones being connected, in particular the impedance.

 

[Max61MI]

I've tried it with a few PSUs I had laying around, up to 12V 4A and heard no difference in Turbo mode compared to a 12V 2A PSU.

When I saw that the official 05FS1 comes bundled with a 12V 2A SMPS I decided to settle on a spare 12V 2A PSU because it had a more supple cable and I don't want to stress the USB-C port.

I also opted for a cheap 12v power supply. 2A. and I don't seem to notice any differences compared to using the internal battery.

Maybe one day I'll try an additional filter like this, when I stop spending on other things.. https://aliexpress.com/item/1005006631732883.html

 

[Max61MI]

In the meantime, waiting for the appropriate R2R module to be released... I'm waiting for this to arrive (using the analogue input of the XD05 Pro): https://aliexpress.com/item/1005006231307049.html

 

[moonbst1]

OK.. thank you for confirming and sharing the test result that there is no difference between 12v2a and 12v3a (or more).
I was really wonder why official power supply (05fs1) comes with 2A PSU.

There is a rumor that widly spreaded out to one of head-fi forum in south korea. one guy started this, almost everyone is willing to upgrade their PSU to 12V5A because of this reason.

 

[Max61MI]

OK.. thank you for confirming and sharing the test result that there is no difference between 12v2a and 12v3a (or more).
I was really wonder why official power supply (05fs1) comes with 2A PSU.

There is a rumor that widly spreaded out to one of head-fi forum in south korea. one guy started this, almost everyone is willing to upgrade their PSU to 12V5A because of this reason.

As regards power supply, there are mainly two factors that impact sound quality:

1 - the level of disturbances (produced by the electricity grid and/or by the conversion process)

2 - the delivery capacity in dynamic peaks

Beyond the fact that the Pro will certainly have internal circuitry designed to minimize this type of problem, an additional filter like the one I have already proposed (or similar ones) can significantly improve these aspects, having a certainly more effective effect than spending for a larger power supply.

 

[gmalik]

Absolutely not; the three levels correspond to as many output levels, with 3dB difference from each other (someone had published a graph in this thread showing the different output levels); each state change therefore corresponds to a doubling (or halving) of the output level.

In addition to this, in qualitative terms some of us also perceived a different dynamic behavior, and for this reason I prefer the turbo mode in any case; however, this could vary with the characteristics of the headphones being connected, in particular the impedance.

“XD05PRO has high output power, its minimum gain (ECO) also has 12dB (unbalanced) / 16dB (balanced) output.”
Xduoo

 

[Max61MI]

“XD05PRO has high output power, its minimum gain (ECO) also has 12dB (unbalanced) / 16dB (balanced) output.”
Xduoo

I know, in fact it damaged a driver of my AKG K812, due to a false contact when replacing the OP Amp...

Now I have had to go back to using my old Q701s, waiting to find someone who can repair my K812s

The problem was caused by the Sparkos SS2590 which have very thin pins and therefore did not make good contact on the extensions; then I found an adapter (riser) where they remained firmly inserted, but the damage was already done.

With 36 Ohm and 110 db the K812 are very sensitive; the old Q701 on the other hand, with 60 Ohm and less sensitivity, withstood a similar problem without being damaged.

 

[Max61MI]

In the meantime, waiting for the appropriate R2R module to be released... I'm waiting for this to arrive (using the analogue input of the XD05 Pro): https://aliexpress.com/item/1005006231307049.html

I received the external R2R DAC, then connected to the Line-in input of the XD05, and I must say that I really like it.

I had never tried before the sound of an R2R DAC and I can confirm that it is a very sweet and organic sound, I believe incomparable in terms of body in the midrange; in particular voices and string instruments are more rounded, fluid, in a word... more "real".
The soundstage is excellent, a large, full and well-developed stage even vertically, something that I had lacked until now with other devices.

I believe those who appreciate the sound of the ROHM module will appreciate the sound of this DAC even more, which I find better in body, sondstage and layering.

Very sweet and pleasant sound, a sense of organic fullness, liquid presence and a general "realism" that is difficult for me to describe.

For example, my Shanling H7 generally shows a greater level of detail in the high range (crisp), as well as in the subbass (in general compared to the XD05 Pro), but at the cost of sounding a little "lighter", with less body, and therefore after the first enthusiasm... one begins to feel a certain lack of continuity between the various ranges, and therefore to my ear a less real and sincere sound.

In fact, compared to my other reference, a Jolida JD100 Reference Tube CD Player (w. Mullard NOS Tube), the H7 shows a wider soundstage horizontally but less developed vertically: all the instruments crowd a space in the upper part of the stage, therefore more evanescent and with less body.

The XD05 Pro instead manages to play with the same stage width as the H7 but also maintaining the body fluidity (and therefore the vertical width) of the tube CD player, at the only price of a little less crisp, which however does not it is missed (if not perhaps for the impact in Metal or electronic pop music)

This applies in general to the XD05 Pro, even with the ESS module (when played via the Burson V7V + Ufeel buffers), but it is even more enhanced with this sweet external R2R DAC, and I hope also with the module that should be released in the future for the Pro.

 

[Ben86]

I received the external R2R DAC, then connected to the Line-in input of the XD05, and I must say that I really like it.

I had never tried before the sound of an R2R DAC and I can confirm that it is a very sweet and organic sound, I believe incomparable in terms of body in the midrange; in particular voices and string instruments are more rounded, fluid, in a word... more "real".
The soundstage is excellent, a large, full and well-developed stage even vertically, something that I had lacked until now with other devices.

I believe those who appreciate the sound of the ROHM module will appreciate the sound of this DAC even more, which I find better in body, sondstage and layering.

Very sweet and pleasant sound, a sense of organic fullness, liquid presence and a general "realism" that is difficult for me to describe.

For example, my Shanling H7 generally shows a greater level of detail in the high range (crisp), as well as in the subbass (in general compared to the XD05 Pro), but at the cost of sounding a little "lighter", with less body, and therefore after the first enthusiasm... one begins to feel a certain lack of continuity between the various ranges, and therefore to my ear a less real and sincere sound.

In fact, compared to my other reference, a Jolida JD100 Reference Tube CD Player (w. Mullard NOS Tube), the H7 shows a wider soundstage horizontally but less developed vertically: all the instruments crowd a space in the upper part of the stage, therefore more evanescent and with less body.

The XD05 Pro instead manages to play with the same stage width as the H7 but also maintaining the body fluidity (and therefore the vertical width) of the tube CD player, at the only price of a little less crisp, which however does not it is missed (if not perhaps for the impact in Metal or electronic pop music)

This applies in general to the XD05 Pro, even with the ESS module (when played via the Burson V7V + Ufeel buffers), but it is even more enhanced with this sweet external R2R DAC, and I hope also with the module that should be released in the future for the Pro.

Which R2R dac?