Hi
I have no experience with the R2R7 or the top of the line Denafrips . But I do have the Denafrips Aries and the Audio gd R2r1 . Out of the box the Denafrips was the King , more Dynamic , More separation , More bass just really very good , but the recent Firmware update for the R2R1 brings it much closer to the Denafrips and it's much easier to listen to , the Denafrips is so vibrant that for me it can be a little tiring , it's like the band is in the room with me beating the hell out of me . I can only imagine that if their entry level dac is this good then the ones at the top must be something else . I am however an Audio gd fan . I like the fact that their dacs are adjustable and are periodically updated with improved Firmware and I can email the owner whenever I have a question and I get a pretty straight and very honest answer , they also have a 10 year warranty . The Denafrips is really good but I would not know where to turn if something goes wrong with it . For me it has to be the Audio Gd . .
I'm currently using a calyx 24/192 dac..
It's on es9018 chip .
Thinking of doing a upgrade for it, and a switch to a r2r dac.
Some of the shortlisted are
Denafrips Pontus
Audio gd r2r 7
And then, when I'm considering the audio gd r2r 7, might as well compare the denafrips offering at similar price range - Venus..
I can't seem to really get some proper comparison no matter how hard I search..
So hope you gets can help to chime in.
I'm using it for speakers (2.1) set up BTW..
Unfortunately it is really hard to compare with many of these so called boutique Hi-Fi products. They are all small companies paying no middleman, no distributors and if there are few distributors they also are small companies that do not advertise or associate with any professional HiFi magazines. So they are all word of mouth. We are at the mercy of good unpaid HiFi Gigs reviewers, but I think they are quite helpful still. May just needs some gut feeling. From what I have read there are a few consistent patterns with various R2R DAC or multibit DAC.
Schiit Multibit - value for money, very clear and accurate, a bit cold but super detail, perhaps analytical ?, no DSD. Gen 5 USB makes use of external USB isolator unneeded.
Holospring - also value for money - forward, punchy, and also great detail, maybe a bit less organic, NOS is great, OS is crap, DSD is superb, USB sucks, need the I2S input (unless they have upgraded the USB now?)
Metrum - warm and lush, detailed enough, very musical - maybe quite forgiving?? Seems to play all stuff from all sources well, cannot do DXD unless you go to top of the line Pavane. NO DSD, no I2S (but can be modified, company can send you a board for that). The USB input sucks (or used to suck)
R2R7 - you can get most info from Head-Fi, in summary great value for money. Superb in PCM playing up to DXD, DSD apparently relatively less impressive but still very good (I have yet to test more of it), USB input is great, galvanic isolated esp if u use amenera USB board. OS vs NOS seem both great, a bit of a pain to need to adjust jumpers, many firmware update, need to be quite hardcore/a nuthead to own because of great number of options - many jumper options and FW updates etc.... I guess it is the DAC for the DAC geek, not for one who just wants to press a button and it works beautifully, needs personal fine tuning. Also super long burn-in period of up to 1000 hrs !! (factory does 300 hrs first).
I only have the R2R7 now and have never had chance to compare with others, I chose it based on the great reviews by the Head-Fi Geeks. And some gut feeling. So far so good! The other thing is I really want DSD too. Between Holospring and this, Audio-gd seems to have best PCM implementation, even perhaps DSD may not be as good as Holospring's ? But again I have never read a review to compare the 2 (vaguely remember there was a dutch review somewhere, but the comparison was not very detailed).
Hope this helps ??