What exactly did you install between the amp and HF driver as "comp" that did not work right?
I would think that putting the correct R1/R2 values in there with the bypass cap would give you the same HF response Wayne designed into his system. With your meter, you could adjust the bypass cap value as needed for "your real world living room", but the resistive padding MUST be there also. Which defeats part of the reason to go "active" in the first place, I guess. Sambtw, you are not the first using a balanced line Rane with unbalanced amp inputs who has reported less than satisfactory results. also, the adcom inputs are "direct coupled", and will not "like" seeing any dc offset from the source...