spritzer Posted March 3, 2018 Report Share Posted March 3, 2018 So as a counter point to the Massdrop amps, I also bought one of these Audio-GD units used. The R2R15 seems to have been replaced by the R2R11 which is more SMD based but it looks very similar. So this cost 350$ new, is not balanced but has a discrete R2R dac, discrete headphone amp and can also be used as a single source preamp. The Chinese version of the product page is still active: http://www.audio-gd.com/R2R/R2R15/R2R15CH.htm I must say it does look really fugly in real life (as so many of the Audio-GD product do) but it's amazing that they can do this for 350$. 6 Quote Link to comment Share on other sites More sharing options...
Torpedo Posted March 3, 2018 Report Share Posted March 3, 2018 (edited) Does it sound decent with the HD800? I don't know if you're keeping any dynamic headphone these days. Edited March 3, 2018 by Torpedo Quote Link to comment Share on other sites More sharing options...
spritzer Posted March 3, 2018 Author Report Share Posted March 3, 2018 I don't have a HD800's now but I can get a set to try out at some point. I do have the HD650's so I'll try them out later when I find some time... 2 Quote Link to comment Share on other sites More sharing options...
K3cT Posted March 4, 2018 Report Share Posted March 4, 2018 The Chinese keep getting better and better at this R2R thing... heard the Holo Spring not too long ago and it was also seriously awesome. A nice alternative if one finds the Yggdrasil too aggressive. Quote Link to comment Share on other sites More sharing options...
Whitigir Posted March 4, 2018 Report Share Posted March 4, 2018 Sorry , dumb question, but Why should we be using R2R instead of SOC DAC chip? Quote Link to comment Share on other sites More sharing options...
Pars Posted March 4, 2018 Report Share Posted March 4, 2018 Many people feel that R2R sound more "analog" than sigma delta DACs do. Quote Link to comment Share on other sites More sharing options...
Kattefjaes Posted March 4, 2018 Report Share Posted March 4, 2018 (edited) While a lot depends on the specific implementation of both the D/S and R2R DAC (and the filters), each can give you a different flavour for sure. Some straight-off-the-spec-sheet D/S DACs in particular can be very harsh in the treble, for example. Of course, R2R dacs with inaccurate resistor ladders can sound pretty poo and indistinct in their turn. Main thing is to have a good implementation of whatever you like. I'm not sure that there's a type you "should" be using (D/S vs R2R, OS vs NOS etc.)- more that you probably should use a unit that sounds good. There's more than one way to skin a cat. Me, I'm quite happy with my modest Gumby (it's effectively R2R, just the resistors are in-package in the DAC chip), but I'm sure there are a good few decent D/S DACs that I'd enjoy too. Edited March 4, 2018 by Kattefjaes 1 Quote Link to comment Share on other sites More sharing options...
tumpux Posted May 6, 2018 Report Share Posted May 6, 2018 Birgir, whenever you have some free time, we would love to hear your follow up thoughts on this amp. Thank you. Quote Link to comment Share on other sites More sharing options...
spritzer Posted May 6, 2018 Author Report Share Posted May 6, 2018 I haven't spent any time with it recently as I constantly have new toys to play with but I'll get back to it at some point. For the price it walks all over the Massdrop and Monoprice garbage. It's also far more useful, a dac (with a variable output too), a preamp and a headphone amp. 5 Quote Link to comment Share on other sites More sharing options...
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