Ladies and gentlemen, it works, and marvelously so.
Amazingly fast and punchy sound with AD8066 (DEEP bass!), smoother lusher sound with beautifully textured midrange with AD8620... Even with an Elpac wallwart, I can't hear much background noise on my Grado HP-2 or Ety ER-4S.
Anyway, the best thing about this is the digital pot... Works like a charm, coming from the 24-position stepped attenuator of the Headamp GS-1, it's such a relief to have what seems to be infinitely more steps in between! Actually, since the DS1802 has 65 positions, it's really more like two more steps for each step, but regardless, it's a real improvement in being able to get the volume just right and still knowing I've got a form of perfectly matched stepped attenuator working for me!
I was too busy listening so I haven't had much time to take pics last night but will do so and post them probably in a new thread since this one is littered with broken links from the start.
Also, n_maher - I think I know your issue, the 2.5v voltage reference pins for the digital pot was incorrect. So, you have to mount it slightly differently, hopefully the pics will show this. This is the only issue from the electronic perspective, other issues are minor such as slightly larger than necessary holes for the 1/4" jacks and the 3.5mm mini jack.
Anyway, more to come soon, but it works and it's beautiful.
Of course I'm a little biased but I think it's true!
