Review and Measurements of Topping D50 DAC

[Jimster480]

I have actually sent topping an email about these 9038 Hump's in the THD, and showed them the results that Amir found with the Pro-ject Head Box using the 9038.
They told me that they will reproduce the issue and attempt to fix it or disable the THD mitigation if they are unable to before the official launch.
These guys are really proactive!

 

[Jimster480]

Thanks for comparing USB vs. S/PDIF. Would have loved to see the same for DX7s, but I understand why you put in the extra effort for this DAC given it is USB powered.

I'm sure he will test the DX7 and DX7S again now that the has the linearity test working on USB.
Not sure how long that will take him or when he will do it, but I'm sure it will happen at some point. Probably when hes comparing another device side by side.

 

[amirm]

Yeh, it is a challenge between testing new stuff vs more testing of existing....

 

[stunta]

Would it make sense to do a poll to see the distribution of users against the input types? I think most people use USB but I could be wrong. If most people do use USB input, I am worried that S/PDIF only tests don't tell us the whole story given the nature of async USB versus being at the mercy of an external clock.

 

[amirm]

I realize most people want to know the USB performance, myself included. It is just that at this point in time, I don't have all the tests running with USB. The key one was linearity. Once I get that finalized, I can switch to most of the tests being USB. USB is also a lot more time consuming to run so when I am under pressure to get data out , you will see more S/PDIF results.

 

[Wombat]

More precious than Bitcoin. "Hey, I've got a Round Tuit".

 

[pos]

I have actually sent topping an email about these 9038 Hump's in the THD, and showed them the results that Amir found with the Pro-ject Head Box using the 9038.
They told me that they will reproduce the issue and attempt to fix it or disable the THD mitigation if they are unable to before the official launch.
These guys are really proactive!

Let's hope it will be a simple firmware update, and they will also provide one for the DX7s!
(together with a calibration feature to counter the imbalance, that would be the best!)

 

[Jinjuku]

Note charging ports are usually 1.5 A up to 5 A max though I do not think I have seen one over 3 A. I am tempted to buy a cell-phone charger and add an inline output filter.

Give it a really audioteric name and cash in Don.

 

[VanNeumann]

I know one of the members had suggested getting a group-buy going in a earlier post. Ironically, I had already sent Topping message about this and they replied to me yesterday that they are not equipped to handle group buys at the moment. Of course, it is possible that if we get a large enough group that they may find a way.

However, Topping did say that there will be a sale ("discount") on the DX7s and DX50 at the end of this month. I emailed them back to make sure that the DX50 would be included and available by that time, but I have not heard back.

If need be we can start a new thread on ordering Topping products, but wasn't sure if it was necessary given their lack of a direct sales department or process.

 

[SoniMax]

Super Best Sch**t Circlejerk are already speculating that this whole forum is a smear campaign funded by Topping lol

 

[Wombat]

ASR bulk buy vs independence. I'd go for independence(integrity).

 

[RayDunzl]

I already have stuff.

 

[Blumlein 88]

I already have stuff.

Yeah me too. It doesn't do 768 khz or DSD 512, but what are people doing with that?

 

[restorer-john]

Hey Amir, what is the blue box of varying sizes in the AP's screen grabs?

 

[amirm]

Good eye.

It is a bug in their software. I just tell it to copy that panel to clipboard and it corrupts that part of the capture for some reason.

 

[Jinjuku]

Good eye.

It is a bug in their software. I just tell it to copy that panel to clipboard and it corrupts that part of the capture for some reason.

Use the Windows Snipping Tool perhaps?

 

[trl]

While looking at the motherboard I realized there are dedicated power regulators installed, instead of a 9V or 12V cheap SMPS PSU followed by a rail splitter via DC-DC buck or boost converters. Probably this is why this DAC has such a low noise-floor, THD as well.

 

[Deleted member 1514]

Yeah me too. It doesn't do 768 khz or DSD 512, but what are people doing with that?

Making themselves feel better?

 

[zephyros]

http://en.tpdz.net/news_detail/newsId=79.html
Seems like it is officially released. Definitely getting one when it arrives at my dealer. I do have an iFi iPower for it, but amir measurement shows that it perform worse than USB port which is surprising (for the MicroRendu I think?). Years of marketing has made me think that USB power line is quite horrible.

 

[amirm]

Use the Windows Snipping Tool perhaps?

I used to do that. Unfortunately the snipping tool captures the entire app or I have to manually select that Window by dragging a rectangle which is a pain. It can't just capture that one window.