Pl advise on Amp for listening to AOR on Klipsch RF7 Mk II via a custom built R2R NOS DAC

Adult Oriented Rock also called Melodic Hard Rock e.g., Andy Rock, Find Me, Free Spirit, Lionville, Raintimes, White Widdow (spelt with an additional 'd'), etc.

Actually in the radio biz, it was called Album Oriented Rock because one track could be 23 minutes such as Pink Floyd Echoes.

I don't want to criticize your speaker choice but have you seen this video?

I was going to suggest crossover upgrades first.

Oh! Did not know that. As I don't have tuned ears, it sounded great to me when paired with a Krell and a Concept 16.5 separately. Perhaps because I did not have much exposure to listening to different speakers side by side. By the way, how are Paradigm Signature S8?