Ayre V1x Damping factor

Can someone tell me Ayre V1x damping factor? It is not in the spec and I want to know its ability to control some low efficient speakers. I was told Ayre V3 have a very low damping factor same as tube amp.....
Best way to get that question answered is call Michael Wiedmaier of Ayre @ 303-442-7300 ext 223.