The worst part,
@VintageFlanker is the poster (
@hudo) is right about the RME ADI-2 DAC FS. I have one here and it offers a much smaller soundstage than a Topping E30 and an NAD C165BEE. So all your measurements really don't help in this case. The limited set of measurements made at AudioScienceReview don't even begin to characterise musical sound. The only thing the set of measurements made here can help with is identifying poor gear. Identifying poor/flawed gear is no small achievement, but it's only a start.
In the case of the RME ADI-2 DAC FS it does have other attributes which help make up for the tight soundstage. On the sound state the RME ADI-2 DAC FS offers almost zero hiss and an excellent parametric equaliser. On the feature side, good headphone amplifier with separate EQ, tone and volume controls;
Based on your obsession with measurements and persistently rude posts, you are slowly convincing me that neither music nor the musical interest you. Since you like schooling people, allow me to return the favour. As Stereophile understood, measurements are a good starting point to reveal hidden flaws and recognise exceptional performance. What matters though is how audio equipment reproduces music, which is why the measurements follow one or two listening tests. Measurements are just a starting point.
In the particular case of this Schiit DAC, more than the flawed measurements what disturbs me is the poor grounding and inadequate safety features, particularly at the price point. On the other hand, when touching the case of the Topping D50s, A50s and P50 all give off 5v and 12v shocks (at that level it isn't a hard shock but an uncomfortable feeling like crawling on one's skin) as they are poorly grounded. The properly engineered for safety RME ADI-2 DAC FS does not do so. A device which doesn't send electricity through my body every time I touch it matters to me.
You'll have to create some new tests if you wish to characterise musical sound with measurements only. A good starting point would be a test which differentiates between a wide and open soundstage and a more intimate closed one. When I've tried to measure such differences with a UMIK-1 coming out of speakers, it's impossible to differentiate most DACs, even when the differences are easily audible. Here's a comparison of the Topping E30, Topping D50s and Musical Fidelity V90.
View attachment 121964
Yet the sonic differences are clear when listening to them (vocals are recessed in D50s, treble is a little brighter in E30, widest soundstage, vocals are smoothest with least grain on V90).
Amir measures for stereo separation but that doesn't seem to have a direct co-relation to the feeling of spaciousness or soundstage. Another hitch is that Amir uses Audirvana as his player – Audirvana output is not bit perfect. Any measurement of stereo separation that Amir passes through Audirvana is worthless in any case, as Audirvana sounds better precisely because of a stereo separation filter (there's also a very slight boost in treble around 8 kHz which adds presence).
In Amir's own words, the
whole point is the music:
In any case, a little courtesy and mutual respect would go a long way to making AudioScienceReview a more agreeable place where both music and measurements productively co-exist.