Review and Measurements of New Topping D50s DAC

[UAN]

You are an electronics engineer?

Huh...

“Dear,” I trust the experts who compared the sound of the D50 and D50s. Objective tests are required after the upgrade.

 

[BDWoody]

I trust the experts who compared the sound of the D50 and D50s. Objective tests are required after the upgrade.

Do you mind if I ask which experts are you citing, and how will you be testing it?

 

[solderdude]

Many thanks! I have a D50, I want to upgrade to remove the "hump ESS". In the D50s it is not.

You want to modify the D50 output stage (with IMD hump) to the same one as the D50s (with no IMD hump) ?

The 10 Ohm resistors are in the power supply path. Changing opamps (not needed) may require different values depending on the idle current of the opamps and minimum operational voltage.

Measure the DC voltage across the resistor with the old opamp and with the replacement opamp or calculate by means of datasheets.

 

[Laserjock]

10.0 Ohm, if you have to ask why are you modifying circuits ?
Why not use a multimeter?
Seems to me the absolute minimum required testing tool for anyone doing mods.

Bad Boys R...

Of course you have to remember which is brown and which is black.

 

[UAN]

Bad Boys R...

Of course you have to remember which is brown and which is black.

?????

 

[Laserjock]

?????

List of electronic color code mnemonics

If you’re an EE, did you learn a different way?

 

[UAN]

List of electronic color code mnemonics

If you’re an EE, did you learn a different way?

In the photo, by the stripes, it is difficult to determine the value of the resistor R24. Maybe you have a lot of experience, help. Of course, better with a multimeter.

 

[Reddy]

I am looking forward too your results.

 

[Reddy]

And, these comparisons are also done with no listening controls or measurements...?

I only checked the power rails with my scope, everything else is subjective.
The soundstage is more open with better separation, more micro details, more organic and yes, all this is subjective

 

[BDWoody]

I only checked the power rails with my scope, everything else is subjective.
The soundstage is more open with better separation, more micro details, more organic and yes, all this is subjective

What do you believe accounts for that? Are these results you would expect to show up in measurements?

 

[solderdude]

In the photo, by the stripes, it is difficult to determine the value of the resistor R24. Maybe you have a lot of experience, help. Of course, better with a multimeter.

A multimeter does not need to cost more than 10 Euro. If R24 is indeed in the feedback loop (quite possible) then you can measure it in circuit (power off). Maybe in Ukr they are more difficult to get.

 

[Reddy]

What do you believe accounts for that? Are these results you would expect to show up in measurements?

Unfortounatly i don‘t have an audio analyser for verification. Hard to say if it would show up in the measurements. What i can tell is that the power rails are very quiet now.

 

[UAN]

A multimeter does not need to cost more than 10 Euro. If R24 is indeed in the feedback loop (quite possible) then you can measure it in circuit (power off). Maybe in Ukr they are more difficult to get.

I repeat, I have a D50, but I need a D50s circuit. There is only a photo of the board.

 

[solderdude]

Yes I understood. You need to either have the actual schematics or reverse engineer from PCB pictures (takes top and bottom side of the PCB's)
The difficult part is not the resistors, the SMD capacitors either need to be unsoldered and measured or schematics need to be available.

 

[Gradius]

Jealous sitting on a chair with 4 walls around instead of going outside to the sun with friends and family? Yeah, very jealous....

Looks like, as you obviously cannot balance the things in life.

 

[Gradius]

I repeat, I have a D50, but I need a D50s circuit. There is only a photo of the board.

They are: Brown, Black, Black, Gold, Brown

In other words: 10 ohms @ 1% tolerance

Confirmed with multimeter too.

 

[Laserjock]

In the photo, by the stripes, it is difficult to determine the value of the resistor R24. Maybe you have a lot of experience, help. Of course, better with a multimeter.

Yes, I was just giving you a hard time.

Good luck on your venture.

 

[sotiridaf]

USB compared to Coaxial has low performance in SQ. You have to invest to USB to Coaxial to get better performance from D50s.

So for me , this dac is NOT recommended for USB as input.

 

[Veri]

USB compared to Coaxial has low performance in SQ. You have to invest to USB to Coaxial to get better performance from D50s.
So for me , this dac is NOT recommended for USB as input.

What a load of bull. What is this magical 'SQ' property? What is a 'Good' USB to Coaxical converter?

 

[sotiridaf]

What a load of bull. What is this magical 'SQ' property? What is a 'Good' USB to Coaxical converter?

Sorry i dont give online lessons . If you have unknown words search a dictionary