I think the X250.5 is more than enough for the Sophias power wise. Sophias are much easier to drive than my B&W N803 and the X250.5 absolutely handles the N803s without any hint of running out of juice. I listen to music on loud levels. The Pass amp is effortless, clean, zero strain and keeps great separation of instruments at high levels. Be it rock, jazz or the large scale orchestral.
I do agree though that a tube preamp is a good idea with Wilsons if the amp is solid state.
Good Luck
I do agree though that a tube preamp is a good idea with Wilsons if the amp is solid state.
Good Luck