Review: Accustic Arts Reference Tube Hybrid DAC II DA converter


Category: Digital

This will be my third go around reviewing a DAC from the German company Accustic Arts. In between having the MK-3, MK-4, and now their Reference Tube Hybrid as my digital front end, I have had the pleasure to auditioned many of the highest regarded DACS and CDPS in the last couple of years. Many of this digital pieces offered great performance, a few were sonic "turkeys" regardless of some steller reviews, but based on great performance without having to get a second morgage to purchase it, I keep coming back to Accustic Arts.

The MK-4 was a significant improvement over the MK-3 and I still believe it's one of the finer sounding DACS around today. That's way I was skeptical about how much better/different would Accustic Arts new "baby" would be compared with their older DAC.

As in all my reviews I do not get into specifications, you can go to Accustic Arts website to get the details, but always comment on build quality and physical appearance. Like its older siblings the Tube Hybrid is just beautifully built and really is "eye candy". The German engineering and craftmanship is very easy to admire. I know one important technical aspect that this is the first DAC in the world that does not use tubes in the analog section, but somewhere further upstream when bits are still bits before the analog conversion stage. What the tubes are doing and how they are used in the overall design circuitry I don't have the foggist notion, just that sonic bliss is taking place.

When I discovered that Accustic Arts new reference would use tubes I was somewhat concerned for the following reasons: 1) My past experience with tube based DACS, such as the Zanden and a very high level Audio Note, was that they offered a very wonderful midrange but they lacked macrodynamics and extension on both the top and bottom ends. 2) The transparency/clarity and very small details I love in the overall sonic perspective of my system were lost.

SONIC PERFORMANCE

I do not like to result to sonic cliches to describe the sonics of a piece I'm reviewing, but this DAC is a "killer"! I hope all of us can agree that once you get to a high level of excellence in audio gear, their are many great pieces and differences become more quantitive then qualitative. We also have to factor in personnal taste and system synergy in to the equation. Taking all of this into account let me try to explain way this is the best digital I have heard in my system to the present time.

1) The Tube Hybrid retains all of the transparence/clarity and microdetails of the MK-4.

2) I will not say that the Tube Hybrid's extension on the top and bottom are better then the MK-4, but the the overall slam and dynamics is slightly more "lively" and natural sounding. Remember, the MK-4 was no slouch in these sonic areas to begin with.

3) Now we get into the specifics of why the Tube Hybrid is a "killer" in qualitative terms.

A) Unlike adding a "warm/euphonic" aspect to the music this DAC adds what many would call a touch of "bloom/fullness" without destroying the overall linear cohesiveness of the sonic perspective. Another more concrete way of saying it would be that image density and the overall harmonic structure ( leading edge, body, and decay trails) is more natural or what alot of audiophiles would dscribe as "analog" sounding.

B) This DAC offers an overall more sense of liquidity and smoothness, but not at the expensive of slam/punch/dynamics or sounding "soft" to be pleasing to the listener.

C) I have a hunch that another reason why the Tube Hybrid sounds more "real" is that it is more tonally linear compared to the MK-4, and any other digital piece I have heard on Redbook, which makes it sound of one piece top to bottom.

D) The Tube Hybrid offers the most natural timbres I have ever gotten from a digital front end.

E) I don't believe that my system's overall soundstage dramatically improved with the Tube Hybrid, the MK-4 was a champ in this area, but the layering and the air around players also went to a qualitatively higher level.

When I wrote a review here on the GON on the Stealth Metacarbon IC's I struggled to use words to describe the sound of "nothing", meaning these cables just get out of the way of the music so the illusion of real music being played by real people just gets spills into your mind and gut. Well, this DAC hits my sonic ear's the same way, it just sounds more like real music then I have ever heard in my listening room before. The Tube Hybrid sonics can be broken down into specifics, as I have tried to do, but its the overall natural/easy/lifelike sonic illusion without the loss of details,prat,sparkle that makes this a very special piece indeed.

I always end all my reviews with the statement their is no "BEST" in high end audio, but many fine pieces along with the factors of personal taste and system synergy. The new Accustic Arts Tube Hybrid DAC II is among one of the finest DACS on the market today, and while it is not inexpensive it competes with DACS triple its price. This German company sure has some talented thinkers with great ears when it comes to digital gear. If your in the market I highly recommend you audition this DAC before you purchase another.

Associated gear
Click to view my Virtual System
teajay
Hotbird, Mr Sommer compares the Drive II with the Wadia WT3200 (I don't know this piece at all) and says it is slightly better in portraying a realistic soundstage, provides a little more air around instruments. He stresses the difference is not very big though. So pretty much audiophile bla bla speak. He falls short of saying its the best combo he ever heard, but does praise its relative price/value ratio. He says the same about the DAC II vs his PS Audio DLIII. I'm surprised he is not able to articulate more, or better, the differences with his gear.
Just read up on a Wadia WT3200, here's the link:

http://www.lampizator.eu/LAMPIZATOR/REFERENCES/wadia%20WT%203200/WT3200.html

Its basically a Marantz transport (Philips 960) from the early 1990s when CD first came out. I can't believe that Mr Sommers believes the Drive II only slightly better than his ancient transport. Same is probably true for his DAC. My regard for this reviewer has just gone down the drain...
My goodness, horrified to know that this reviewer Mr Sommers is comparing brand new SOTA digital equipment with his antique digital setup, namely his PS Audio DLIII and Wadia transport and then hear little differences. Guess I don't want to find out more of what he writes after this revelation,as it appears to me that this reviewer certainly do not have a setup with a resolution like Teajay's to do proper comparisons ;-)
Just wanted to share that I recently listened to three very highly regarded digital front ends and the Accustic Arts Tube Hybrid really "hangs" sonically with these other reference level pieces. I'm not saying that the AA DAC was better, however I did not go back to the tube Hybrid with any sonic regrets at all. But here's the punch line the other digital pieces cost at least $8000.00 to $30000.00 more then the Accustic Arts DAC! So, I still believe that for what this DAC sells for and how it competes with hughly more expensive reference pieces that's it is still one of the great bargains in very high end digital front ends.
Well like Teajay, I have heard the AA Tube DAC2 and Drive Mk2 combo against Esoteric X01D2 with external Esoteric clocks combo, dCS Pucinni, emmLabs combo equipment that have combined prices many times the AA combo, and still preferred the AA Tube DAC2 stuff. Thus for those who wants to save big money but yet still get the SOTA digital performance, AA digital equipment is the way to go to stretch your falling dollar. Just hoping I can get my hands on the Accustic Reference Drive2 soon, which I am sure would be a big upgrade over the old Drive Mk2 ;-)