Review and Measurements of Topping D90 4499DAC

[pozz]

@LuckyLuke575

@WolfX-700 and many others before him have contributed reviews. The idea is that as long as the reviewer has described their measurement process and shows technical competency, there is no issue. There was previous discussion about establishing standards. The reviews represent a community effort in any case (catching errors, noting limitations, recommending additional procedures).

 

[Celty]

I really like the ASR forum. I personally respect the objective measurement and the evaluation based on it.

That's why I bought APx555 and started posting measurement results on this forum.

If there is something that I did not do well enough, especially in the measurement, welcome everyone to give me suggestions and opinions. ----- I believe that in my past interactions, the members who interacted with me should feel that I value the opinions and suggestions.

I also sincerely hope that ASR will get better and better.

I say we owe a big thank you to folk like you who are willing to invest in very expensive test equipment and spend the time to review and share the results. Hooray for Amir and Wolfie

 

[amirm]

I too appreciate Wolifie's contributions. The only issue is that when I promoted one of this reviews to the home page (the Audio-gd R8), people on another forum bashed me for not knowing how to measure. Someone corrected them at the end but the damage was done. I was crying all day, looking for a cliff to jump from....

 

[Thomas savage]

I too appreciate Wlifie's contributions. The only issue is that when I promoted one of this reviews to the home page (the Audio-gd R8), people on another forum bashed me for not knowing how to measure. Someone corrected them at the end but the damage was done. I was crying all day, looking for a cliff to jump from....

Yes and he might be getting more ' likes ' than you too , I know this will make you insufferable.

 

[Veri]

We live in a harsh world

 

[Tks]

I too appreciate Wolifie's contributions. The only issue is that when I promoted one of this reviews to the home page (the Audio-gd R8), people on another forum bashed me for not knowing how to measure. Someone corrected them at the end but the damage was done. I was crying all day, looking for a cliff to jump from....

Oh noo bossman!

Have a nice vegan sushi and a cute bunny

 

[Celty]

I too appreciate Wolifie's contributions. The only issue is that when I promoted one of this reviews to the home page (the Audio-gd R8), people on another forum bashed me for not knowing how to measure. Someone corrected them at the end but the damage was done. I was crying all day, looking for a cliff to jump from....

There will always be detractors, just rock'n'roll and enjoy doing your thing!

 

[WolfX-700]

Topping established a communication group between me and their R & D engineers. We are communicating the details about J-Test very seriously. They reproduced my test results and said they would look for the problem.

it's great! A company that is willing to face problems and try to solve them is always great, isn't it?

And this is also in line with my utopian dream. I hope to be able to promote the industry a little bit by third-party measurement and review.

 

[Feyire]

Topping established a communication group between me and their R & D engineers. We are communicating the details about J-Test very seriously. They reproduced my test results and said they would look for the problem.

it's great! A company that is willing to face problems and try to solve them is always great, isn't it?

And this is also in line with my utopian dream. I hope to be able to promote the industry a little bit by third-party measurement and review.

Could you ask them to take a look at the linearity as well? The quest for perfection

 

[Veri]

Topping established a communication group between me and their R & D engineers. We are communicating the details about J-Test very seriously. They reproduced my test results and said they would look for the problem.

it's great! A company that is willing to face problems and try to solve them is always great, isn't it?

And this is also in line with my utopian dream. I hope to be able to promote the industry a little bit by third-party measurement and review.

Wonderful news I do like Topping's approach, taking problems very seriously.

 

[WolfX-700]

Could you ask them to take a look at the linearity as well? The quest for perfection

I think we should wait for them to fix the J-Test problem and re-measure. one by one

 

[VeerK]

Did you get a chance to measure the dimensions of the D90? And thank you @WolfX-700 for contacting Topping engineers regarding the J-Test issues

 

[oldsysop]

We want all this to survive beyond any one individual

Bye bye Amir.

 

[oldsysop]

I too appreciate Wolifie's contributions. The only issue is that when I promoted one of this reviews to the home page (the Audio-gd R8), people on another forum bashed me for not knowing how to measure. Someone corrected them at the end but the damage was done. I was crying all day, looking for a cliff to jump from....

His cycle is over.
You should send your APx 555 to @◘restorer-john, so he can measure the equipment that interests me, Vintage from the 60s / 70s.
Thanks.

 

[WolfX-700]

Did you get a chance to measure the dimensions of the D90? And thank you @WolfX-700 for contacting Topping engineers regarding the J-Test issues

They reproduced my measurements yesterday afternoon. Looking for solution

 

[Hemi-Demon]

@WolfX-700 Great job! This is my next dac if they can fix that linearity. Curious what is up with the 4499 chip that is causing both devices you have tested to measure so poorly with respect to linearity.

 

[bequietjk]

Any chance we could get case dimensions, Wolf? Please!

 

[WolfX-700]

Any chance we could get case dimensions, Wolf? Please!

43*160*220mm

 

[bequietjk]

43*160*220mm

I'm gonna have to slap some sideburns on the side of my THX 789 to stack the D90 on top..

 

[VeerK]

I'm gonna have to slap some sideburns on the side of my THX 789 to stack the D90 on top..

Lol, in my case the D90 is 1mm less wide than the THX 887, so an almost perfect match