Amp recommendation for Revel Ultima Studio2?

Anything really that’s good quality, as they are 90db and a 4ohm load, with no nasty - phase angels, only if low organ music is played 30hz to 40hz will freak out amps that are not up to it. https://www.stereophile.com/images/archivesart/308Revfig1.jpg
Go with what you like the sound of, you have very good expensive speakers $16k. If you let your dealers know this is what you have, they should break a leg to do a home demo for you to get a sale.
My suggestions the above Pass XA series is great or a Parasound Halo A21+

Cheers George

Thanks George! How about Hegel H590 or the new Parasound JC 5?

How about Hegel H590 or the new Parasound JC 5?

Great also, but with the Hegal being integrated, there no choice of going direct to the poweramp with the source if it has it’s own volume control. Which to me is the the most transparent/dynamic way of getting the music to the poweramp.
And the JC5 I believe doesn’t have as much Class-A bias as the A21+ has and it’ll be the sweeter (airier) of the two, still very powerful 300-8ohm and 500-4ohm.

Cheers George

Ahh...ok.

Luxman M-900u?