Sorry for reviving an old thread but I just got an Aries Cerat Helene in as a demo (I am a new dealer in NJ) and did a compare to the Playback Designs MPS-6.
I have done comparisons testing of dozens of DACs using the same five songs, Duke Ellington and John Coltrane's In A Sentimental Mood, Sting's Be Still My Beating Heart, Anette Askviks Liberty, Bozzio Levin Stevens Duende and the Berg Quartett doing Mozart's String Quartet No 14 in G Major.
The AC Helene arrived in a wood crate on a pallet jack. The unit without packaging is 80lbs. With packaging, has to be 100. I used my hand truck to roll the unit down to my basement. Fortunately, I have a walk-in basement.
I opened up the unit with my cordless drill as the unit is screwed shut. It is heavy so getting the unit out is a challenge. Best if you have a second person. In fact, I would argue that a purchase of any Aries Cerat product should require a second person to be with you to unpack.
I got the unit out and quickly realized that the term "overbuilt" lost all meaning to other equipment I have owned. It borders on absurd. The top is machined stainless steel, not aluminum. Everything is solid on this unit. Mass is a benefit in terms of absorbing vibrations and AC definitely delivers mass.
Removal of the top for tube installation was quick and easy. I then placed the unit in my rack where it barely fits. Hooked it up. Turned it on and let it warm up.
Came back and listened and was pleasantly surprised with a very refined sound right out of the box. I then played it as much as I could for about a week. and this is my POV after maybe 60 hours of burn-in.
The Helene is immediately impressive with a massive soundstage that is deep and wide. Tonally it is neutral with extraordinary dynamics. As far as actual songs go:
In a Sentimental Mood - piano had great sparkle. Drum rolls are clean. Image extends beyond the speakers and there is minimal localization. Very energetic and dynamic.
On Be Still My Beating Heart, the image is massive extending well beyond the speakers and depth is very good with the sound coming immediately from my left and right while the image is behind the speakers dead center. Stings voice has no hint of sibilance, piano and bells sound natural and the noise floor is very low.
Liberty sounds big and natural. Effects come from well beyond the speakers. Noise floor remains low. Again, not a hint of sibilance.
Duende, opening bass solo is clean and crisp reflecting top level performance. Cymbals are airy. Plucks of the guitar are clear with great air.
Berg sounds great. No massing of strings. Image is probably bigger than it should be but that is the nature of these very big sounding DACs.
I was so impressed I decided I would do an AB comparison between it and the Playback MPS-6. I connected both units via XLR to my preamp and ran an AES and Coax out to the devices from the Antipodes.
The difference between DACs was immediate and obvious. The PBD is a hair warmer, image is the slightest bit smaller and a bit softer and less dynamic. The Playback is a bit more detailed and has a certain musicality that is simply unmatched by any other device I have heard.
I dragged my wife down and she is a HUGE fan of the Playback. To a point where I have had other DACs hooked up to the system and she asks "what is wrong" and insists I swap Playback back in.
Her favoritism toward the Playback remained here but she acknowledged that the AC is much better for her than other units I have had in.
Compared to two other units I have tested in this price range (Rockna Wavedream Signature XLR and the Jadis JS1 MKV), the AC is probably a hair less detailed than the Rockna, a bit more detailed than the Jadis. I am not sure anything can match the scale in terms of width and height of the Rockna soundstage but this sounds much deeper as the Rockna central image is relatively flat. It matches or exceeds the dynamism of the Jadis.
This unit is amazingly good and very fairly priced at $19,000. The Playback is $18,000 as tested and starts at $15,000, the Rockna is $18,500 and the Jadis was $20,900.