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Measurements of Topping DX3Pro LDAC/V2

WolfX-700

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#1
In the Should Topping send Amir a DX3Pro LDAC/V2 to test? thread, someone asked me if I could measure DX3Pro LDAC/V2. Considering that this unit was not in my purchase plan, I borrowed one from Topping.

Front.jpg


Rear.jpg



From its Amazon price of $ 219.99, it seems that it should not be too much to complain about appearance, texture, build quality, etc.
But if you are critical, you can blame the quality of the RCA / COAX connector.
The touch of the surface treatment is very good, and I really like how it feels when touched --- the sound from the friction of the touch is not soft enough.
The encoder switch has good damping and positioning feel. However, the sound is slightly "fluffy", which is not good enough ...

Well, forget the nonsense above ... Measure it!

Part I: DAC
COAXin.jpg


USBin.jpg


Linearity-(-20.jpg


Relative-Level-(1.jpg
THD+N-Ratio.jpg
SMPTE-Ratio.jpg
Multitone.jpg



Part 2: Headphone output

300RDash.jpg

50RDash.jpg


HP-Dynamic-Range---AES17.jpg


HP-Linearity-(-20.jpg



HP-50R-530mw-Out.jpg


HP-SMPTE-Ratio.jpg


50R-Multitone.jpg


output impedance:

Output.jpg


IMO: The headphone output is actually not good enough (sorry, this conclusion does not consider the price). But the DAC part is doing well.

The price is beyond reproach.

BTW: Bluetooth testing may have to wait a few days, my adapter has not arrived yet.
 
Last edited:

thomasjast

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#2
Thank you for doing this!

Damn, that linearity is looking bonkers. Are you able to test headphone output impedance or output power at 300ohm?
 
OP
WolfX-700

WolfX-700

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Thread Starter #3
Thank you for doing this!

Damn, that linearity is looking bonkers. Are you able to test headphone output impedance or output power at 300ohm?
Ah, I forgot to measure the output impedance ... After a while, I take care of my family first.
 

NTomokawa

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#5
The two channels measure differently in SINAD and linearity. Interesting. Channel mismatch...?
 
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#8
IMO: The headphone output is actually not good enough (sorry, this conclusion does not consider the price).
The price is beyond reproach.
For someone who isn't great at reading these graphs... could you (or anyone) comment further on these points please? :)

BTW I got this for $165 on Drop. That deal is sold out now. Interestingly, it was shipped straight from China so they've obviously got some arrangement there. Not sure if it'll be that price again but worth watching for it if you're interested.
 

Yuno

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#20
Ok, now i understand. Can i use 35ohms headphones with this? I have the Audio Technica M40x and i really like them.
You can, but it's not ideal. Output impedance of amp should be 1/8 of headphones impedance, in this case around 4Ohm. I would recommend getting atom as amp with dac of choice instead.
 
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