@fuzzbutt17 I have seen several DAC's now daisy chain DAC chips and seen the Aries-Cerat daisy chain several of the same DAC chips that is in the Mystique DAC's. Have you thought about doing it in your models. Is there a pro/con to doing this?
Six DAC Comparison
I am in the middle of comparing the sound of six different DACs in my system. I own them all (I know weird) but one of them is still within a trial/return timeframe.
Not to share specific comparisons today, but a couple of observations so far are that first, they all definitely sound different from each other. On one hand, they all sound pretty good and play what is fed to them without significant flaws but on the other hand there are definite sonic differences that make it easy to understand how a person might like the sound of some of them while not liking others.
Second, raises the observation that most of them must be doing something to shape the sound in the manner the designer intended since one of the DACs, a Benchmark DAC3 HGA, was described by John Atkinson of Stereophile as providing "state-of-the-art measured performance." In the review, JA closed the measurements section by writing, "All I can say is "Wow!" I have also owned the Tambaqui (not in my current comparison), which also measured well ("The Mola Mola Tambaqui offers state-of-the-digital-art measured performance." - JA). The Benchmark reminds me sonically of the Tambaqui, both of which are excellent sounding DACs.
My point is that if the Benchmark is providing "state-of-the-art measured performance," then one could reasonably presume that the other five DACs, which sound different from the Benchmark, do not share similar ’state-of-the-art" measurements and are doing something to subtly or not so subtly alter the sound. Whether a person likes what they hear is a different issue.
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@mitch2 Thanks for the response on the Helene. I am in Oklahoma and if you bike you don't have much of a window. As we get into the summer the temperatures gets up past 100 degrees and in the fall and winter it is very windy so you got to get it in while you can. There must be a correlation between biking and audio because I have cone across several bikers online. I was looking at the internals of the Helene and it is very impressive. I have seen several companies daisy chain the DAC chips now. I know Benjamin at Mojo Audio is moving on to a different DAC chip but I would like to know the benefits of daisy chaining and why he hasn't done that.vv |
To answer some of your questions... Our new Mystique Z will have three inputs: USB, coaxial AES/SPDIF, and TOSLINK. Aside from the upgraded DAC chips and upgraded power supplies, we are makings quite a few upgrades to our AES/SPDIF and TOSLINK inputs. The AES/SPDIF and TOSLINK inputs on the Mystique Z will still use a 100% external clocking source, but we’re adding an active buffering input stage, more advanced hybrid star/plane grounding, and some more advanced filtering stages, to better clean up the digital signal. As for multiple DAC chips and "daisy chaining" DAC chips that is a good question. One of the big reasons for using multiple DAC chips has always been that it averages any inconsistencies in the individual DAC chips yielding a more linear digital-to-analog conversion. That is why it was very common with lower cost lower performance R-2R DAC chips such as the TDA1543 and the AD1865. Other reasons for using multiple DAC chips have to do with output voltage and output impedance, which tends to be more important with tube than with solid-state DACs. By paralleling DAC chips, designers can often eliminate the need for an additional tube stage and often reduce noise and harmonic distortion. At Mojo Audio we take a different approach: rather than using multiple DAC chips we optimize the linearity of the DAC chips we are using. On the R-2R DAC chips we’ve used by Analog Devices and Burr-Brown they have the option of adding a fine-tune adjustment circuit. Considering it requires a trained technician to adjust these circuits using sophisticated test equipment you can understand why most companies decided to put multiple DAC chips in their DACs to improve performance rather than requiring every DAC they manufactured be burned in and fine-tuned by a technician. Now for the really cool news... The AD1865 and AD1862 DAC chips Mojo Audio has been using have provision for one fine-tune linearity adjustment circuit for the MSB. The PCM58 DAC chips we’ll be using in our new Mystique Z has FOUR independent fine-tune adjustments for the MSB, 2nd bit, 3rd bit, and 4th bit. No small difference. We actually had to invest in an extremely accurate distortion analyzer just to be able to make all of those fine tune adjustments. Of course we could have taken the easy way out and saved quite a bit of time and $$$ by using multiple DAC chips "daisy chained" in parallel. |
Allow me to correct my mistake, Weiss's top end products do not have I2S, however the Antipodes streamers do offer the I2S output. |
@fuzzbutt17 So have you been trimming or adjusting the Mystique X series DAC's? When reading your post you mentioned that you just purchased the correct equipment to do that, So do the people with a current DAC send them in to get them adjusted? Do you have an ETA on the new Z DAC and an idea of the starting price point? |
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