I use my H9 plugged into the 9V 500mA  output of the Truetone CS7.  works great.  The Truetone comes with an adapter specifically for Eventide (and others).  the issue is the inner diameter of the plug.  As far as Eventide not supporting damage caused by other manufacturers’ power supplies (yeah, i get it), Trutone staff assured me via email that the CS7 is safe to use w/the H9.  I’ll be saving that email just in case! 😉  Actually now that i think of it, Truetone even states this in their manual so i’m not losing any sleep over it.