Loopback measurement of RME ADI-2 PRO FS (Black Edition)

[March Audio]

Just need to make sure these comparisons are performed under same conditions, dBFS/dBc voltage etc

 

[Rja4000]

This is very helpful as for a while I have been considering getting an ADI2, but it would be a sideways step from my Motu 8A

View attachment 45549

Better off getting the notch filter and ultra low distortion sig gen sorted.

Did you ever try to average the 8 inputs of the 8A ?

Building a 8-channels Y split cable and them averaging all 8 channels in Motu software?
In theory, you should improve SNR by several dBs (3dB x 3)...

 

[March Audio]

Did you ever try to average the 8 inputs of the 8A ?

Building a 8-channels Y split cable and them averaging all 8 channels in Motu software?
In theory, you should improve SNR by several dBs (3dB x 3)...

I have thought about it but never managed to motivate myself to try it out I really should!

 

[Rja4000]

I have thought about it but never managed to motivate myself to try it out I really should!

You may try with 2 first.
Then if you get improvement, you'll probably be more motivated.

 

[March Audio]

You may try with 2 first.
Then if you get improvement, you'll probably be more motivated.

Im trying it right now

 

[vitalii427]

Just need to make sure these comparisons are performed under same conditions, dBFS/dBc voltage etc

View attachment 45565

View attachment 45566

View attachment 45567

Whats your input ref level?

 

[vitalii427]

I've tried +13 dBu output ref level, +19 dBu input

 

[vitalii427]

"Lock frequency to RTA FFT" makes better results and almost no skirt

 

[March Audio]

1 channel 5v RMS -6dBFS

2 channels plugged in but no summing

2 channels summed in Motu DSP (-6dB)

Well that worked

 

[netcipher]

It seemed to me that for a given DAC, it is more relevant to measure jitter and compare the results with the original DAC.

 

[vitalii427]

It seemed to me that for a given DAC, it is more relevant to measure jitter and compare the results with the original DAC.

Which one is original?

 

[netcipher]

Which one is original?

RME ADI-2 Pro vs RME ADI-2 Pro FS

 

[vitalii427]

Best SINAD: 112.6 dB

 

[Blumlein 88]

Motu was my second choice. Really interesting to see measurements of new M2/M4

There is a forum member with the M4. Measures will be forthcoming I do believe.

 

[vitalii427]

RME ADI-2 Pro vs RME ADI-2 Pro FS

I think jitter performance of ADI-2 Pro FS is the same as ADI-2 DAC FS

Here is mine. Seems like some 8 kHz jitter, but it is more than 140 dB below signal.

 

[netcipher]

Thanks. Also interesting are the measurements for the DSD, since the RME ADI-2 Pro FS does not use PCM conversions to volume control. I think that it’s worth doing a separate test for the ADC.

 

[March Audio]

Noise floor 1 channel

8 channels

 

[vitalii427]

Noise floor 1 channel
View attachment 45585

8 channels

View attachment 45586

Wow! That is not subtle difference definitely

 

[netcipher]

Noise floor 1 channel
View attachment 45585

8 channels

View attachment 45586

What is the value of M and fs for calculating the FFT process gain?

 

[March Audio]

What is the value of M and fs for calculating the FFT process gain?

Just look at the overall values so that's 114dB v 122dB.

I think that was a 512k fft.