It is impossible for other DACs to sound as good as the Dave and Blu 2 / M-scaler as they have short tap length filters and don't reconstruction the original analog wave form correctly. The other issue is generally digital volume controls affect dynamics unless very little attenuation is required. Anything more that 20 dB and the DAC sounds flat. The DAC then requires various analog gain setting to match different systems. Analog volume controls affect transparency. This is why these DACs can sound better with a pre-amp. The great thing about Chord DACs is that they have properly designed digital volume controls, don't require a pre-amp and can feed power-amps directly.
I appreciate the effort of assessing the DAVE / M-Scaler top notch performance on a technical basis, and it is clear that you are a very knowledgeable person – for sure much more than myself, for that matter.
Usually I am a bit skeptical when a product is claimed to be “the best” based on its design philosophy, or even based on actual measurements, especially when it comes to audio.
I see many controversial points on such an approach, for example:
- The DAC performance is of course based on technology architecture (Delta-Sigma, R2R, FPGA, etc.), but largely on its implementation as well – not all delta-sigma DACs are created equal, for instance;
- As technology evolves (new materials, electronic components, processes, algorithms, ...), some designs which were believed to be outdated or fundamentally flawed become attractive again (see ladder DACs);
- No definitive and quantitative proof exist – to my knowledge – about physical measurements and perceived sound quality relationship, partly because of the largely unknown correlation between which quantities are translated by the human apparatus (ears, brain, etc.) into “faithful reproduction” of a real soundscape, and how.
So, even if as an engineer I tend to be an objectivist in most cases, I have come to accept that as long as audio gear is concerned – and especially at the very high-end – I need to listen before I can decide what I like more.
When I can’t listen prior to buying, I personally prefer to take the risk of forming a judgement based on other’s subjective and fallible reviews and impressions – especially from trusted fellow enthusiasts with whom I believe I have affinity of taste, rather than relying on technical specifications.
In the case of the DAVE (and Blu2) there is no dilemma, since both the technical features and the reviews from owners and professionals speak highly about the product. I, for one, have become a DAVE evangelist among my audiophile friends.
But, there are other DACs out there which are very well regarded, and I am open to hear by folks who tried them thoroughly and compared to the Chord stack that they can compete or even outclass DAVE + Blu2 in their opinion, just out of curiosity.
Of course, having committed to Chord ecosystem, I am much happier when I find reviews in favor of Blu2DAVE vs crazy expensive stuff like dCS or even MSB