Kal Rubinson has posted a review of the Marantz AV8802A preamplifier-processor ($3999) in his Music in the Round column at Stereophile. His conclusions:
“The Marantz AV8802A does everything its predecessor did, and more. It adds support for Atmos and Auro-3D. Its Audyssey calibration is easily competitive and now supports the multiple-speaker configurations of the new immersive formats. Finally, the decidedly improved analog outputs benefit all audio functions, including analog multichannel pass-through. If your concern is primarily for music playback, can you do better spending $1000 or so for a separate multichannel preamp? No way.”
You can read the full review here.