All I know is my model is Windex 440 - do not know anything about D9 or anything else, - sorry. If it is discontinued I do not know, but regardless you cannot go wrong with ANY of the Widex models in my opinion - new ones would probably be better. I had an older model from 2006 that was great - for music - it just finally wore out in 2014 - probably from overuse. it just broke apart. I do not think you can get more that 8 to 10 years out of any model hearing aid by any firm. The technology improves and they just don't last forever.
