Pono and the Ayre Codex


Hi everyone, a recent review over at Audio Science Review made me put a few things together.


The review from 4/11/2019 is here:


https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-ayre-codex-dac-amp.7282/

Couple of things I have to wonder about. First, what’s interesting to me is how close the distortion and output impedance measurements are to the Pono, measured by Stereophile here:


https://www.stereophile.com/content/pono-ponoplayer-portable-music-player-measurements

The ASR reviewer (amirm) unfortunately measured the Codex before listening to it. I say unfortunately because honestly to my ears the Pono was one of the best headphone amps / DACs I’ve ever heard. In particular, I’ve never heard my Shure E4s sound as good as they did with the Pono, so the Codex has always been kind of interesting to me, now that the Pono is gone. I never ended up buying a Pono for user interface and size issues, but I have always kind of wistfully remembered it. Instead I’ve gone with Fiio.


It is impossible to tell if Amirm would have come to the same conclusions about the quality of sound if he/she had listened first.

As it turns out I’ve kept my desktop setup cheap and used a Topping which is quite nice.. but I wonder now and then if my memory of the Pono was wrong, or whether Ayre would ever make another portable amp, like say a module for the Fiio portable.


Sorry, this is a bit of a ramble, especially since I’ve not heard the Codex, and my time with the Pono was years ago.


For those of you who have heard either or both, what are your thoughts??
erik_squires
Another epic review at ASR destroying a fetiche product of hi-fi reviewers.  ASR  is the must go place if one wants to have a clue of what is purchasing. I just wish Amir could expand to speakers.   Very few hifi products are passing the engineering tests at ASR -> many people have been ripped off. 

The funniest thing for me of the Codex review, is that this unit has been the reference in its price bracket of a 'golden ear' reviewer of another popular forum. Really funny.






Sadly not measuring the balanced headphone output on the Codex, or Pono for that manner, completely misses the core of this units design and performance.  A simple qualitative test between the output forms reveals a noticeably large difference in audible performance.  Ayre designs balanced circuits and, I believe, adds additional circuitry so there is a single ended output to meet market expectations.  I own both a Pono and the Codex as well as recently acquiring a QX5 twenty.  The reduction in XLR output noted has not been my experience in use, but I have not made any quantitative measurements. 
Post removed