The 9x is called the mx-22 in the UK and Europe. My guess is that Horizon wants to sell all the 10x units it can before selling the 9 channel because of it great new and added features that the 10x does not have. It comes down to $$$. You can read all about it at
http://www.graupner.de/neuheiten_dow...08N03HK-ef.pdf . Lets see if Horizon has the guts to leave this post.