R to r dacs

@tennisdoc56  No, it just indicates that they're using a (now obsolete) R2R chip.  Phillips (e.g.,  TDA1541) and Analog Devices (e.g., AD1865n-k) are two of the common ones used in the best gear.  Other manufacturers, such as Aqua Hifi, Holo Audio, TotalDAC, and MSB build their own R2R resistor ladders, but I personally do not believe that this approach guarantees better performance over a chip-based solution.

If you're feeling flush, the Aries Cerat Kassandra DACs are also R2R and use the Analog Devices 1865 chips, just an easy ~$100,000 for their top of the line model:  http://analoguefellowship.com/2020/03/02/aries-cerat-kassandra-2-limited-edition-the-ultimate-dac/

I haven't heard the other DACs on your list, but here's in-depth feedback on the Denafrips Pontus II DAC compared to the Chord Qutest. I had the Denafrips Ares II on loan from a friend in my system for several months as well, so can compare the Pontus to the Ares also.

I've had a Chord Qutest in my system for the past 2 months with the intention of comparing it to the Denafrips Pontus II. I received my Pontus this past Monday so have had several days of listening to the Pontus after giving it 24 hours of break-in on top of the 100 hours that it received at the factory.

Background on the Qutest as a reference point: The Qutest sounded really good with notably a high level of detail retrieval. There were two shortcomings that stood out for me about the Qutest.

1. With the stock power supply, there was a slight, and I do mean slight, degree of harshness. I found that using a pretty common Anker battery both reduced the noise floor and took away that slight bit of harshness.
2. The Qutest is exceptionally detailed in its sound. But, the Qutest conveyed that detail that seemed artificially Technicolor. Meaning that there was a lot of detail, but either to a degree or conveyed in a way that didn't feel natural or lifelike to me. It sounded slightly, and again I do mean slightly, more "audiophile" than musical in sound.

My Objectives for getting the Pontus: In my decision to try out the Pontus, my objective was to get 90% of resolution that a Qutest provides with more of the warmth that I heard in the Denafrips Ares II. Harshness and listening fatigue are very real problems for me with digital audio so a balance of detail and warmth is important for me.

Impressions of the Pontus:

Resolution and Warmth: I always thought that resolution and warmth were traits on two opposite ends of a spectrum. It has already been eye-opening that Pontus actually seems to have even more detail and resolution than the Qutest and also more smoothness and warmth than the Ares II. What's interesting is that this resolution is delivered in a more lifelike and natural sounding way than via the Qutest. I'm noticing this right now with the piano and string bass in the 'Pueblo Nuevo' track on the Buena Vista Social Club recording as well as the trumpet and the tonal quality of metal and wood percussion instruments. The Pontus sounds both smooth and full in its sound. One artist for which this unique combination of resolution and warmth really does justice is Jimi Hendrix. I often have not liked to listen to Hendrix on digital due to harshness and noise from jitter and analog sources, compared to my typically better experience of listening to Jimi Hendrix on vinyl. I'm not finding this to be the case with the Pontus. Jimi Hendrix' Voodoo Child is sounding both engaging and listenable via the Pontus.

With the Pontus powered by a Shunyata Venom power cord, I'm hearing no sense of the slight harshness that I heard from the Ares. I also have a Synergistic Research UEF Blue power cord that made the Ares II DAC sound smoother without any loss of detail. I'll try that out on the Pontus DAC in a couple of days to see if it makes any difference to the sound of the Pontus.

Presence: Instruments and voices are conveyed by the Pontus with what sounds like an appropriate level of weight for each instrument. On the 'Orgullecida' track on the Buena Vista Social Club recording, the string bass has a greater level of fullness in its presentation than the voices, electric guitar and trumpet as would be appropriate in real life. In contrast, the Qutest communicates the details but seems to be less able to convey the weight and fullness of each voice and instrument's sound. The 'air' around voices are also conveyed by the Pontus in a very palpable way but with a sense of refinement and restraint that sounds realistic when compared to a real-life performance. In the Cowboy Junkies' 'Trinity Sessions' recording, I hear this very clearly in the 'Blue Moon Revisited' track.

Soundstage: The Pontus definitely has a broader and fuller soundstage than the Ares and the Qutest as well, I think. The fullness of the Pontus sound might be a major contributor to my perception that it has a bigger soundstage than the Qutest. I hear this in the Cowboy Junkies' Trinity Sessions album.

Pace & Emotional Range: What appeals to me most about the Pontus and perhaps what I noticed first was wide range of pace that the Pontus is able to convey. Some DACs like the Qutest have good pace. Other DACs such as the Ares II sound more relaxed. It's intriguing to hear a DAC that can sound both relaxed as well as upbeat and dynamic as needed. For the Pontus, that ability allows it to sound relaxed and calm or energetic and dynamic depending on the music being played. Music through the Pontus seems to be conveyed as the artist or composer intended instead of the Pontus imposing its own sonic signature onto the music. Examples of these two ends of this scale that I have heard are Sara Watkins' new 'Under the Pepper Tree' album versus Les McCann & Eddie Harris' excellent 'Swiss Movement' recording of their performance at the Montreux Jazz Festival.

Flow & Continuity: Consistent with my comments on the Pontus' adaptability in terms of pace and emotional range, it is conveys the flow of music really well. Its presentation makes it easy to "follow the tune" when listening to music. For lack of a better way to describe this quality of the Pontus, I would say that it has a lot of patience in how it conveys music. It's not in a rush to get the next note out as the Qutest sometimes seems to be, but can play quicker or slower depending on emotional nature of the music. The 'Murmullo' track on the Buena Vista Social Club recording has a languid pace that the Pontus conveys well while not losing the underlying drive behind the music. Partly this is due to good timing, but the Pontus' ability to convey tonal colors also helps it to provide this sense of drive and forward movement even on music that is not conducive to an insistent sense of pace. I'd like to point out one recording on which I've heard this quality from the Pontus, but the truth is that I hear this sense of flow on everything I'm listening to with the Pontus.

Sound quality of streamed versus local files: Something else that I've heard is that the Pontus seems to at least narrow the sonic difference between streamed Qobuz files and local files. Local files have always sounded better to me. I attribute that to a shorter signal chain without the noise that might come in through being sent through the internet and then transmitted through my local network. Listening to local files and the equivalent music track from Qobuz were very close in sound quality in sighted listening to the degree that I'm don't know if I could distinguish the difference in blind testing.

Summary: I'm sure there are more expensive DACs that improve on some of the performance aspects of the Pontus, but I am so impressed by the natural and lifelife way that the Pontus communicates music with no apparent shortcomings in resolution of detail, pace, or tonal quality. I greatly appreciate that it seems to be causing no listening fatigue for me while still presenting music in a full and detailed sounding manner.

But, the Qutest conveyed that detail that seemed artificially Technicolor.

Because it's said Delta Sigma based dacs, while "so far" the way to go for converting DSD, can only give a facsimile of PCM Redbook 16/44 24/96 or DXD, where R2R does them "bit perfect" and one day will do DSD consistently better also.

Cheers George

I own a Denafrips Pontus purchased less than a year ago and I am very satisfied. It was at the high end of my budget but I am very pleased. The Pontus has been upgraded to the Pontus II and I suspect it will be better. I think this would be an excellent choice. I have mine paired with a Roon Nucleus+ server using Qobuz and I don’t want for better. 
Bill in Nova Scotia