I have not tried that. Having owned several modern ARC comonents (Ref 2, 2SE, 3, 10 Phono, and 5SE and 10 Linestage) I will speculate that the differences you hear between 6N6P and 6H30 in ARC phonotages will be pretty similar to the differences you hear between those tubes in ARC linestages. The 6N6P is relatively inexpensive so worthwhile to experiment if you want to hear for yourself.