Review: Concert Fidelity DAC-040 DA converter


Category: Digital

Starting in 2005 I worked myself up the chain of the very fine DACS built by Accustic Arts of Germany, finally ending up with their Reference Tube Hybrid. I have auditioned over six very highly regarded DACS in the last couple of years and found them to be quite good, but none of them exceeded the performance of the AA Reference Tube Hybrid in my system. I do not use high resolution material, only Redbood CDs, so these auditions were only based on this format because my large collection of music is composed totally of this material. Well, I know nothing is the "BEST" in high end audio, there are many fine pieces of gear when you get to a certain level of excellence. However, I thought that maybe the evolution of DACS that play the standard format had got to the point that it could not get really that much better. Each DAC might offer different slight flavors but not a qualitative shift to a much higher level of performance. It has turned out that I was very wrong regarding this assumption after auditioning what has become my new reference, the Concert Fidelity DAC-040.

The designer of the CF DAC-040, Mr. Masa Tsuda believes in very short and clean circuits in all of his designs. The analog section of this DAC is very similar to what he uses in his highly regarded reference LS-080 linestage. They both use 12AU7's and a 6CA4/EZ81 full-wave rectifier tube. It took over two years of on-going listening tests for Mr. Tsuda to find the NOS DAC chips to use in his DAC, there is no over or up sampling and any type of digital filters to be found any were in this piece, that delivered the sonics he was looking for. Which DAC chips he finally decided on are confidential and not disclosed. All the Concert Fidelity and Silicon Arts, same company, pieces are beautifully built to an exemplatory level including the DAC-040.

Why was I taken so aback by the sonic performance of the CF DAC-040, here's the reasons:

1) By far the most natural timbres and harmonic colors I have ever heard coming from a digital front end.

2) The microdynamics and prat of this DAC are amazing, yet it still allows the listener to relax into the music without giving up the punch and kick of the music.

3) What I refer to as image density or a 3D quality, what most would just call palpability, of each player with air around them on a layered soundstage was the best I have ever had in my system.

4) The CF DAC-040 creates a very open and deep soundstage with great layering in a natural way that allows you to have the illusion that your in that acoustic space.

Believe me, the AA Reference Tube Hybrid DAC is no slouch in these sonic qualities, yet, it was no were close to having these special attributes that the CF DAC-040 was providing in my system. To use very subjective terms this DAC has the most musicality/naturalness that I have experienced that just draws you into the music. Dare I say that a lot of listeners could be fooled into thinking that they were hearing an analog front end, instead of a digital source, I think so.

I end all my reviews by sharing that there is no "BEST" piece of any kind of gear, but many terrific ones. Personal taste and system synergy always comes into play. If your looking for one of the best Redbook DACS around today I highly recommend you audition Mr.Tsuda's "baby", you will be in for a sonic treat.

Associated gear
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teajay

Showing 11 responses by agriculturist

Hullo:
I am a complete novice in the use and rolling of of tubes. But I too am lucky enough to have one of these wonderful CF DAC-040s. I notice that some people are using Tung Sol 12AU7, 12bh7 or 12bh7a with it. I have found the Tung Sol 5670 to work very well with my headphone amp (Elekit TU88 AS) and am substantially preferring the tonality Tung Sol to other 5670s, such as Sylvania Gold Brand 5670s on it. Does that mean I would quite possibly prefer the Tung Sol 12AU7 or 12bh7 or 12bh7a on the CF-040 relative to the Sylvania Gold Pin Gold Brand 12AU7? Would anyone on this forum have recommendations that I could use in this regard? For example, Paul, I saw your comment from October last year about Tung Sol. Any ideas anyone has for enhancing my enjoyment of this great DAC would be much appreciated. Thanks.
Hasan
Hi:
FYI, to those who might be considering the use of 12bh7a/12bh7 tubes as I had been, I was just informed by Mr. Tsuda himself that these are not recommended for the DAC-040. BTW I am now using some Tung Sol 12AU7s and they are certainly very much to my taste.
Hasan
Hullo:
I would like to mention for those who might be interested, that, at the recommendation of someone who sold me his CF DAC-040, I have been using a John Kenny Ciunas converter to re-clock the digital output from my Mac Mini before sending it to the DAC-040. This exercise has succeeded far beyond my expectations, and the sound I have started enjoying from decent CDs easily rivals what I hear from my very good turntable and cartridge. No way for me to tell what many of you are getting by using your CD transports, but the computer option can work very well too with DAC-040.
Regards
I believe you would like the Berkeley which is very special. This is what I use with mine. I have tried a few others, not necessarily all the ones you have named.
Hullo Prawax, I have not heard any of the cables you name. I am very happy with a combination of Synergistic Research's Tesla SE Hologram D power cable and SR Tesla D3 digital interconnect. The rest of my PC and IC set up consists of SR's shielded Element Tungsten or Copper cables, and I also use the SR Tranquility Bases under the DAC-040 and my integrated amp. I can say that it all works very well. Hope that helps.
Regards
Prawax, one more thing I would recommend is to place 10 Synergistic Research ECTs inside the DAC. They move the already superb performance of the DAC up quite surprisingly. The sound is more transparent, natural and holographic. I found originally that placing five ECTs inside is very helpful, but just recently I have discovered that using ten ECTs is far better. Apparently these little devices eliminate high frequency noise that occurs inside digital components. You can look them up on SR's web-site.
Enjoyed reading your review Teajay. Sounds like the battery (BD) version is a meaningful improvement over my older non BD version. But I do enjoy the sound I get, somewhat enhanced as it is by Synergistic Tranquility Base conditioning and ECTs. I hope that I am getting at least some of the same gains that the BD version offers. Anyway, thanks for the heads up about it.
Has anyone experimented with different rectifier tubes in the CF DAC-040? I mean of course the single 6CA4/EZ81 that goes inside the box. I had been using a smoked glass Mullard which I just replaced with another of the same type. When I put the new one in I got a cleanup in sound and stronger bass than I had been getting just before. I had to replace the old one because it seems to have been the source of some distortions I was hearing mostly on crescendos of solo and choral female vocals. Thanks for any ideas.
For those running the CF DAC-040 for computer audio, a suggestion that could be handy. I have been using a Berkeley USB converter that has worked very well for the last year or so. Yesterday, I received my new amber Uptone Audio USB Regen device, which moves it forward again. So that I now feel that in probably every way I am now getting better sound from 16/44 music loaded on my Macmini's external drive than from my turntable with this latest addition. Of course, this is in combo with the Berkeley USB converter, SR Tranquility Base, SR cables and 15 SR ECTs stickytak'd all over inside the DAC-040. I have a 2010 MacMini with a solid-state drive and a simple external G-Tech hard drive.
FWIW after more listening and comparing, I realize that records can sound meaningfully better than CDs still in my set-up. But this doesn't detract from what a great player the CF is.