Si alguien tiene duda de la compatibilidad de estos receptores con HDR, he encontrado este mensaje en AVS forums:

Response from Pioneer Europe regarding HDMI 2.0a & HDR support for the new models (LX59, 79 & 89)

"All three new SC-LX (LX59/LX79/LX89) models support BT.2020 HDR right away from factory.
For 2015 VSX models a firmware update is needed.

Due to HDMI regulation it is not allowed to specify the 2.0a version number in public materials."