Review and Measurements of Audio-GD R8

[WolfX-700]

In past measurements we have confirmed that even discrete R2R can perform very well.

However, many devices using the same type of technology perform poorly, which is why I mentioned in my previous measurements that I instinctively hate discrete R2R.

Today we have ushered in such a unit.

A reader of my website sent me this unit and he wanted me to measure it.

(If you are from China, I believe that by seeing the photos, you can already understand what terrible things will happen later)

This is the dashboard:

All the above measurement results indicate that this is a garbage.

Even more frightening is that the manufacturer is a liar

Here are the measurements published by the manufacturer:

My suggestion: you should Never Ever Forever consider this manufacturer's products.

 

[solderdude]

What does it look like up to 200kHz or so ?
The grass between the harmonics may be folded back into the audible range due to poor filtering.
Can you measure/make visible the low pass filter (if present at all ?)

 

[WolfX-700]

What does it look like up to 200kHz or so ?
The grass between the harmonics may be folded back into the audible range due to poor filtering.
Can you measure/make visible the low pass filter (if present at all ?)

This is the NOS 1M FFT measurement made before:

I'll go to dinner first and come back to measure the filter characteristics

 

[Veri]

Oh no

Thanks for the measurement/review !!!

Even more frightening is that the manufacturer is a liar
Here are the measurements published by the manufacturer:

View attachment 40757

This is just fraud

 

[solderdude]

looks like a filterless design or should I say headless design.

-100dB around 920kHz (for those with class-D amps)

 

[bunkbail]

S/N Ratio: >120DB

A huge liar, indeed. Thanks for the measurements.

 

[solderdude]

Well they did not lie completely .... the S/N ratio is >120dB, even in the measured one.
They just don't tell you that it drops tremendously when it has to do something (as in play music or test tones).

 

[Veri]

Well they did not lie completely .... the S/N ratio is >120dB, even in the measured one.
They just don't tell you that it drops tremendously when it has to do something (as in play music or test tones).

Always read the fine print, folks

 

[Alexander Gödde]

Thanks for the measurements!

I think from previous measurements by amir it was already clear that audio-gd is to be avoided, but it's always good to have independent confirmation.

 

[pkane]

looks like a filterless design or should I say headless design.

You are mixing up animals. Headless only applies to the pink panther reviews

 

[bennetng]

 

[WolfX-700]

What does it look like up to 200kHz or so ?
The grass between the harmonics may be folded back into the audible range due to poor filtering.
Can you measure/make visible the low pass filter (if present at all ?)

 

[Alan S]

R.I.P.

 

[Alerma]

Jitter measurements please

 

[WolfX-700]

Jitter measurements please

 

[pkane]

View attachment 40767

That’s seriously broken!

 

[Koeitje]

Edit: I'm blind

 

[Audiophonics]

Intentionally or not, It look like that the measure published for the R-8 is the one for the R2R7, as its same image url :

http://www.audio-gd.com/R2R/R2R7/17211701THDbalances.JPG

 

[bunkbail]

the S/N ratio is >120dB, even in the measured one.

Which one?

 

[amirm]

Good job. Promoted to home page.

I have found the same issue with Audio-gd measurements not matching the gear itself as shipped.