I don't believe Audio Research recommends any power conditioners at this time. I might suggest you contact Kalvin in Customer Service at Audio Research and ask him directly.
Surge Protection for ARC Tube Amps
I have to admit the more I read about power conditioning, the more confused I get. I am looking for a recommendation on protecting my Audio Research Reference 110 from power surges, and my speakers which are of course cabled to the amp. I had an incident last summer which might have been related to a surge, perhaps from lightning in the area. I have a PS Audio Premier Regenerator for other components, which is said to provide surge protection. But the PS Audio unit doesn't seem to like being connected to the amp -- it becomes very hot when I do that. So....at the moment I just have the amp plugged into the wall, perhaps not the best idea. Anyone have any suggestions how to handle this?