Interesting. Muralman says "I am not sure what JR model you are referring to." And then says the X350 "...delivers a purer signal than any JR. I did a direct comparison of both amps (and many others) in my home on Rockport speakers. The clear winner was the Jeff Rowland Model 10. I won't say whether Aron would have the same preference, although in my case is was an easy decision. Power IS another decision. I can't speak to that, as I have not used the Model 10 on the Studios.