Running Springs Audio Duke PC for phono stage?

I think you'd be fine but not sure you would hear much difference vs a different Running Springs like the Haley.

Thanks for the response Roscoeiii.
I suspected the Duke would perform more optimally with my amps, but I wanted to make sure I would at least get some benefit using it on my Chinook. The plan is to use it on the Chinook for the time being and eventually move it over to my amps or possibly my subs when I can afford a more appropriate conditioner for the Chinook.

I can't comment on Running Springs, but Furutech some very nice conditioners that work well on sources. They're not too expensive either. Cable Co has demo units for the whole Furutech line.