Full 8K Reference Level 13.2 Channel Full 4K Ultra HD A/V Pre-Amp, Copper Shielded Chassis, Built-in HEOS multi-room technology,Wi-Fi, AirPlay. 13.2 channel XLR and RCA preouts. 8 x HDMI inputs/3 x HDMI outputs (Including 1x 8K HDMI 2.1 Input). Marantz HDAMs in Current Feedback topology. Dolby Atmos, DTS:X and Auro 3D. 4K full-rate pass-through, 4:4:4 pure color, HDR and HDCP2.2 support. ISF certification/calibration for picture. Audyssey MultEQ XT32 setup/room calibration. Front panel USB input. iOS connection sharing. Marantz 2016 AVR remote app, ECO mode, HLG (Hybrid Log Gamma) Pass-through capabillity. eARC (Enhanced Audio Return Channel) and IMAX support