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Review and Measurements of Topping DX3Pro DAC and Headphone Amp

amirm

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Your Score: Mild Indication of OCD
Your answers suggest a Mild indication that you have symptoms common among people with OCD. However, this quiz is no substitute for a proper diagnosis from a health care professional and we would encourage you to schedule an appointment with your doctor or other mental health professional now.

:confused:
Next time you guys wonder why there are spelling errors and such in my posts, you now know why:

1544133110150.png


:)
 
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Ok, sorry, I'm not a very electronicy person .. I bought this one day to have somethign around :)

Yes, the video was AC and you do set it manually with the SEL button. I now measured it on a DC setting.

The left channel shows 0V (or if I have it on mV, it jumps around 0.1 mV).

The right channel shows a constant 8.4V.
That's even higher than I expected to see, no wonder your headphones burnt out. Do not use further and return the unit ASAP.

I know that when I receive my unit the first thing I do below I plug any headphones into it is measuring for any DC offset.
 
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Context is relevant. You joined this forum Saturday, and this appears to be the only thread you are posting to. Your posts are are in response to a legitimate issue with a production unit, and that is a valid issue.

Having said that, and considering the number and tone of your posts (all in this one discussion), it would be easy to perceive your participation as single minded. People (including the manufacturer) have responded to, and acknowledged, your complaint.

At this stage, your best course of action may be to widen the scope of your activity within the forum and let this issue rest for a bit. Some "positive" contributions on other threads could aid your reputation, ameliorating some of the perception that you are a loud voice in a small room with a particular bone to pick.

If, after some time away from this issue, you see that it has receded to the background or been buried, a gentle reminder about your problem should be all that's needed to get people's attention back on this (you've beaten the drum loud enough).
I don't keep going on about, that's the thing. I keep having to post reply after reply after reply to people like you who for some reason think they need to chip in like their some kind of ASR bastion.

I don't need to hear it. People are just blowing it out of proportion running to the aid of amirm as I dared to draw criticism to a review here (quite valid criticism) and despite the last word in the review "welcoming it" it seems it isn't welcome at all.
 
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We should have given you better instructions. If that is the reading, the right channel is shorted out and the unit needs to be sent back for replacement. Do NOT plug anything else into it.
Oh well :( What worries me, is that it initially worked ... can this happen just because I had an IEM in it (a TRRS one)? I'm worried, because even if it was replaced, I'm worried it'll happen again.

@TP-Wong
Hello .. aren't you from Topping and could add to this convo, please?
 
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Ok, sorry, I'm not a very electronicy person .. I bought this one day to have somethign around :)

Yes, the video was AC and you do set it manually with the SEL button. I now measured it on a DC setting.

The left channel shows 0V (or if I have it on mV, it jumps around 0.1 mV).

The right channel shows a constant 8.4V.
Seems broken then, does that high DC reading look the same when no track material is playing or using another track than that from post 994.
 

amirm

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Oh well :( What worries me, is that it initially worked ... can this happen just because I had an IEM in it (a TRRS one)? I'm worried, because even if it was replaced, I'm worried it'll happen again.
You mean the 4 ring ones? If so, I have not checked to see if it causes a short or other issues with the normal stereo jack.
 
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I don't keep going on about, that's the thing. I keep having to post reply after reply after reply to people like you who for some reason think they need to chip in like there some kind of ASR bastion.

I don't need to hear it. People are just blowing it out of proportion running to the aid of amirm as I dared to draw criticism to a review here (quite valid criticism) and despite the last word in the review "welcoming it" it seems it isn't welcome at all.
Curious, the only person who I attempted to aid is you. You might make friends if you didn't treat every response as a personal attack. As it stands, you had a very valid point which you have completely nullified by your persistent belligerence.

I hope your issue is resolved and quickly so you may find the door back to reddit/4Chan, where your particular mannerisms may be better received.
 
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How can it recede into the background with all the clicking?!

(Sorry, just joking, couldn't resist!)
The worst part is that this is a legitimate issue, acknowledged by the manufacturer, which has been completely overshadowed by the poor attitude of the reporting user. Life isn't about being right, its about winning people's support. Hopefully a lesson @Bigsy learns before it has more significant ramifications for his/her life.
 

RayDunzl

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I have not checked to see if it causes a short or other issues with the normal stereo jack.
Depends. I see two wiring patterns that might be used:

This one would work. TRRS contacts L/R/G/G in the TRS jack, giving single ended signal to both sides of a 4-wire headphone.

1544135595317.png


Then there's this, that gives me a headache.

1544135667780.png
 
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Curious, the only person who I attempted to aid is you. You might make friends if you didn't treat every response as a personal attack. As it stands, you had a very valid point which you have completely nullified by your persistent belligerence.

I hope your issue is resolved and quickly so you may find the door back to reddit/4Chan, where your particular mannerisms may be better received.
Reply no ... I lose count... Blah Blah Blah whatever makes you feel better bro.
 
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Depends. I see two wiring patterns that might be used:

This one would work.

View attachment 18496

Then there's this, that gives me a headache:

View attachment 18497
Given that they said they were using cheap ear buds, it may be more likely that the TRRS connector's extra contacts are for a mic connection, which would shirt to ground, and shouldn't cause damage to either device
 
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It's just normal IEMs for phones .. they have the extra ring for the microphone (headset IEMs).
I dont believe this should cause a problem then. The first T and R should behave the same way they do in a standard TRS connector, and the last S should still contact the ground in the TRS female socket. Since there is no power flowing through the second R in either direction, they should behave as normal ear buds with no mic.
 
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