Review and Measurements of the Leaf Audio DSD1796DAC

[WolfX-700]

Last Wednesday, forum member @Zek asked me if I could measure Leaf Audio DSD1796 DAC.Because he was very curious about the DSD1796 chip.

This is a cheap unit. So for this friend's curiosity ... I bought one.

Helping others is also redeeming yourself.


Here is the time for the 555 and Leaf DSD1796 joint show

Designer claims THD + N is 0.008%

-20dbFS

This is much better, so I suspect the problem comes from a USB-powered design with a single 5V power supply

D-R

THD-Ratio

IMD-SMP

And Headphone Amplifier：

I use a 50R resistor as the load

This is a simple review and measurement.
Overall, I think the performance of this unit is average.
But taking into account (I bought) the price and features. I think C / P is high.

 

[Rja4000]

Will you give it a try with an external power supply?

 

[WolfX-700]

Will you give it a try with an external power supply?

That's useless. The DC interface is also a 5V design ...

 

[Zek]

Thank you @WolfX-700
Is the measured device a standard model or a tweaked one?

 

[WolfX-700]

Thank you @WolfX-700
Is the measured device a standard model or a tweaked one?

Standard model

I have the same OPAMP as the tweaked one, I also tried to replace it and did a quick measurement-basically no change

 

[pma]

Clipping looks different, like crossover distortion. The profile for 0dBFS is analog output stage distortion.

 

[Zek]

I tried to explore what the difference was - replacing some capacitors and op-amps I think.

 

[WolfX-700]

I tried to explore what the difference was - replacing some capacitors and op-amps I think.

I asked the developer, tweaked one just changed OPAMP from 4580D to 49720NA

 

[JohnYang1997]

emmm. The performance is pretty bad regardless of price. Is it better than apple dongle? And meizu dongle?

 

[Zek]

I asked the developer, tweaked one just changed OPAMP from 4580D to 49720NA

I compared the inside images of Leaf Audio and Douk Audio and found differences in 12 capacitors and 3 op-amps.
You measured Douk Audio and not Leaf Audio - is there any difference between the two.

 

[HammerSandwich]

That's useless. The DC interface is also a 5V design ...

Could there be a boost converter that can use more input current? I can't imagine including the extra port & switch if they do nothing.

EDIT: And now I've seen @Zek's pictures...

 

[WolfX-700]

I compared the inside images of Leaf Audio and Douk Audio and found differences in 12 capacitors and 3 op-amps.
You measured Douk Audio and not Leaf Audio - is there any difference between the two.
View attachment 41041 View attachment 41042

Aha, you pay great attention to details

However, this is only the difference between production batches ...