Power Amp & Integrate Amp

Actually carlsbad, if you click his screen name he joined on 

What you need is a 2 channel power amp.   Schiit Vidar could  do the job.

Or a 4 channels power amp. If you think about more channels in the futur :

ATI  class D  

An integrated amp. with home theater bypass would only serve if you want

high quality 2 channels for music( front speakers )   AND  home theater capabilities  when needed. 5.1.2

Thank you

Integrated amp can work if it has an HT bypass feature. This is needed since your Marantz needs to fully control the volume of the Atmos speakers. So a power amp would be a natural fit. Any decent 2 CH amp will work to drive them. You do not need anything too fancy for this application. Look for used amps. Good luck!

I see you just joined.  Home theatre isn't a strength here.   Maybe someone will be able to answer you but you'll also get some misinformation.  You'll probably do better in an HT forum.