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Review and Measurements of Topping DX3Pro DAC and Headphone Amp

ClosDeLaRoche

Active Member
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Jun 21, 2019
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The volume of DX3Pro is not a general volume but a rotary encoder. In the structure inside, many electrodes are printed on the circumference of a disk-shaped insulating substrate, and the rotation angle is detected by rubbing it with a mechanical brush.
Due to its simple structure, the behavior you point out will inevitably occur. It will occur again if you use it even if you replace a new part.
The frequency of occurrence is proportional to the number of times the dial knob is turned.
If you don't like it, use the remote control to operate it.
I know the structure and drawbacks of this part, so I usually operate it with a remote control.
Interesting, thanks for explaining the design of the knob.
 

JohnYang1997

Master Contributor
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See what mod for Topping DX3Pro was made by an enthusiast from Ukraine.
Again? I have seen this posted somewhere. A lot of things are wrong in this video. Even the pdf for the dac chip is wrong. And there's no measurements shown after modification. I know it wouldn't measure any better.
 

Asma

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Sep 23, 2020
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theoretically, such modifications can give a tangible increase in sound quality by ear? or is it just self-deception?
 

Asma

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some people who make mistakes are too convincing that they are right. it is confusing.
 

Kennedy

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Nov 22, 2020
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Just upgraded from my age old SMSL M3 to this beauty.
Didn't expect a huge difference, but it was noticeable within 5 seconds. Very pleased so far.
 

Cacophony

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Jul 30, 2019
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Will it be safe to run an Atom via the lineout (opa1612 stage) when either the opa2140 or transistor stage is broken?

The headphone out makes a massive loud click when headphones are connected and shuts off, but the lineout from testing seems not broken.

Sorry for reviving the thread, I haven't been able to use my dx3 for almost a year, got charged import duties for the replaced unit and didn't bother to get another, but apparently that was a mistake and I shouldn't have had to pay duties.

Update: I shouldn't assume it's still have opa2140 since they send me a "4.7ohm" version of the v1 version
 

Kennedy

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Nov 22, 2020
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What difference that you noticed?
Improved clarity, more balanced sound, better bass.

Well, it's been 3 weeks. I think it's safe to say I lost a good portion of my hearing.
Used to have my samsung music player on volume 3 and enjoy music just fine. Now I need minimum 4-5, 3 sounds almost like whispering.
 

Fluxed

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Oct 12, 2020
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I recently reset my Topping dx3 pro but now it stays on all the time even when the PC and TV are switched off, before it use to go off on its own anyone know the setting to make it auto switch on when an audio signal appears and off when nothing ?

I did try auto button with A-0 and A-C but didnt work
 

TLDRonin

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Dec 22, 2019
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Not sure if this is the right place to ask this, but does anyone have this problem with their DX3 Pro?


Whenever I touch/move it the usb disconnects and makes a clicking sound. Its terribly annoying since its so sensitive to any sort of movement
 

Fluxed

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Oct 12, 2020
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Not sure if this is the right place to ask this, but does anyone have this problem with their DX3 Pro?


Whenever I touch/move it the usb disconnects and makes a clicking sound. Its terribly annoying since its so sensitive to any sort of movement


Not ever had that issue, but that sounds like its a hardware fault. Have you tried to try a different usb cable and also try the power plug into a different electrical socket.

While you are checking the power plug check its fitting in firm into the back of the topping amp and its not loose.
 

Toku

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Apr 4, 2018
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I thought DX3 Pro was discontinued, but it reappeared as DX3 Pro +.
I think that the missing AKM products such as AKM4493 were changed to other chips and renewed and reappeared.
This solved the question of the release of PA3s.

The FB Topping page states that it will be officially announced on September 28th at 10 AM.

 

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Lifu

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Dec 24, 2019
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This would have been my main DAC+Amp if the LDAC version didn't have the high output impedance problem.
 

Toku

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The DX3Pro+ SPEC has been greatly improved.



The wolf measured it immediately.
 
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