Reference DACS: An overall perspective


There has been many threads the last few months regarding the sonic signature of some of the highest regarded reference DACS (Dcs,Meitner,Ensemble,Audio Note,Zanden,Reimyo,Accustic Arts) here on the GON. I have been very fortunate to audtion many of these wonderful pieces in my home or friend's systems. I wanted to share, in a systematic way, my impressions/opinions with you GON members for a two reasons: 1)That my experiences might be helpful to fellow members interested in audtioning these DACS. 2)Starting an interesting discussion regarding the different "sonic flavors" of these reference digital front ends. I totally agree with the statement, "if you have not heard it you don't have an opinion". Therefore, I have no comments regarding DACS from Weiss,Goldmund,Audio Aero and Burmester because I have never had the pleasure of audtioning them. I would love to hear from members who have and share their experiences with us. My overall impression is that these DACS(Dcs,Meitner,Ensemble,Audio Note,Zanden,Reimyo,Accustic Arts) can be grouped into two molar categories regarding their overall sonic signature. By the way, all of them can throw a large/deep soundstage with excellent layering in the acoustic space with "air" around individual players on that stage. However, than they start to part company into two major categories. Category #1) These DACS "flavors" revolve around pristine clarity, fine sharp details,speed,very extended top/bottom frequencies,and great PRAT. These DACS never sound "etched" or "in your face" but are more "upfront" then "layed back" in their presentation. The DACS, to my ear's, that go into this bracket are Dcs,Ensemble,Meitner. My personnal favorite in this group is the Ensemble, which I owned for two years. These DACS remind me of the sonic signature of speakers such as Wilson,Thiel,Dynaudio, Focal/JM Labs. Category #2) These DACS "flavors" revolve around a "musical/organic" sense, natural timbres,and an easy flowing liquidity. Their "less forward" presentation my give the impression of less detail, but I think in this case its an illusion fostered by their more relaxed/organic manner. The DACS, to my ear's, that go into this bracket are Audio Note,Zanden,Reimyo,Accustic Arts. I did find that the tube DACS did not have the top/bottom frequency extenstion and PRAT of the SS DACS in this bracket. For me, the Accustic Arts DAC1-MK3 gave me the best of both categories, therefore it is now the resident DAC in my system. These DACS remind me of the sonic signature of speakers such as Magnepan,Von Schweikert,Sonus Faber. Well, it's all just my opinion regarding these digital pieces, but I hope this post was at least informative/somewhat interesting and would lend itself to other GON members sharing their impressions, not about what DAC is the "BEST" in the world, but your personnal taste and synergy with your system.
teajay
Audiofail, could you qualify your statement further? What where the components downchain from the Esoteric gear with which you experienced no difference running balanced or single ended. I do admit I am slightly surprised at your findings. X-01 for one is a fully differential balanced design. I am personally running it on a fully differentially balanced system comprising of an X-01, ARC Ref 3 and Rowland 7M monos with Audioquest Sky XLR ICs. If I turn off the balanced signal on the Ref 3, there is a huge sonic difference. Admittedly, I have not tried to use a single ended length of Sky between my X-01 and the Ref 3 for validation.
Guidokimono:
Pass XA-60 power amps
Art Audio PX-25 power amps
Atma-Sphere S30 amp
Pass X0.2 linestage
Art Audio VPS-DM linestage
Atma-Sphere MP-3 linestage
Stealth Indra
Zu Varial
Stealth Sextet
Zu Definition
Zu Druid
Silverline Bolero
Hope that helps. Email me if you wish to discuss further.
Looking at the X-01 schematic diagram, it appears to be fully balanced design with 8 parallel/differential mode DACs per channel. These are 4 physical DAC chips but each of them has 2 paralleled DAC output sections inside. This equals total of 8 DACs per channel.

The fully differential Balanced output uses different Op Amps and is free of capacitor coupling - all DC coupled.

The Single Ended output uses a different phase summing Op Amp which is capacitor coupled on its output.

Knowing how the two configurations and different parts used will affect the sound, I have to say that there should be (and there is) a good difference between the SE and Balanced outs sound quality in favor to the Balanced.

Regards,
Alex
Audiofeil=WC65Mustang is this the same dealer basher product endorser who was turned out by TVAD and others to be a dealer himself all along? Is it really YOU two in the same rags? Tom
Thank you Audiofeil, did not know I had turned Japanese. A very impressive system list. I know Pass gear is fully differentially balanced, but I do not know about the rest of your gear. And have you tried to swap a balanced ICs from the X-01 to the linestage with an identical single ended one, while maintaining the rest of the fully differentially balanced system intact?
Thank you Alex, your post definitely corroborates TEAC's recommendation to run the X-01 in balanced mode for best results, as well as my own findings with the balanced/single-ended switch on the REF 3.