So I was finally able to visit my local Definitive Audio(DF) toy land to test out the Codex. I spent about an hour there. I brought my PONO for comparison and my two earphones (both PONO balanced - Aurisonics ASG1plus and Yuin PK1 earbuds). I understand that the PONO design was ported over to some degree in the Codex but greatly enhanced in every conceivable way. The Codex setup was connected to some Sonos server and the only track they had in queue that I was interested in listening to was the lossless Eagles track, "Hotel California." The Codex does have a rather small footprint. The chassis looks like a generic Hammond type case with the custom front plate, and the dial control was pretty intuitive.
I listened to this track three times from start to finish. Then swapped to my PONO player listening to the same track twice before going back to the Codex and listening to the same track again twice. You can probably guess that between the Codex and PONO, the two don't belong even remotely close in the same class. This can be said to pretty much any DAP and desktop amp/DAC combo. What I like about my PONO is its smooth yet detailed sound that is pleasingly analog to my ears but without sounding too warm. Despite sharing the same genes if you will, the Codex was exceptionally smooth and the biggest difference between the two is in spatial space and cues that contributed to very realistic and holographic sound experience. If you ever listened to a track where all the sound sources (voices, instruments, audience..etc) sounds like it's coming from the right position with the right depth and width in relation to each other and within the confined venue space, this is what the Codex brought to my ears.
My PONO is my only experience with Ayre and from what I've read about them and their products, they do seem to have their own philosophical approach. I was told by the DF salesman that Ayre never discounts or goes on sale, and the Codex is the cheapest product they sell. I must admit, I was tempted to pull out my credit card and suck up the $2K price tag (taxes included), but I'm not prepared nor willing to deal with my spouse's wrath. In end, the Codex is definitely on my wish list and if two grand ever falls on my lap or finds its way to my bank account, my desktop end-game will finally come to an end (pun intended).