Didn't you get the printout of the graph and a brief description of what the tuning kit is for? Also, if you look on the box it will say 1.0 or 1.1, just posting for other users before they remove their earpads to find out.
mmm....I did. But what was imprinted in my mind was the pad upgrade procedure for the Ether (Open). I thought it was the same procedure for the Ether C. In any case, I've tried the different pad combo (no pad, one white, one black or two blacks) and the one that is closest to my preference is the single black pad inserted into the earpad "window." I'm very impressed with the Ether C. Only downside: since I live in a tropical country (and summer is just around), my ears sweats a lot more than usual lol! Currently testing my Ether C with my AK 240 + Vorzuge Pure II plus. Really loving it......same with the V 1.1 Ether Open.