So this morning I reran Audyssey MultEQ XT32 on my SR 6012, 5.2.2 right now. Hoping to add 2 more Atmos rears soon. I turned off every possible noise interference, clocks, refrigerator, central A/C, etc. I was extremely careful with the microphone placement using a tripod in all 8 locations. Boy what a difference it made. I thought it was good when I ran it the first time (I was no where near as careful). Now it isn't just good it came out great. I did boost the Subs by several dBs though. Played numerous test audio discs that I have and some YouTube 4K Dolby Vision/Atmos videos. Yeowser! I think I woke the neighbors up as I did it really early this morning as the house was totally quiet. I couldn't be happier with the SR 6012. I do run the main 5 channels through a Rotel 200 watts/channel amp. Dual 18" DIY subs with separate power amp for each pushing 1500+ to each.
Sony XBR-75X900F, Marantz SR6012, Rotel RMB-1095, Monster HTS3600MKII, Canton 890.2 DC, Klipsch RF-5, RC-7, RS-7, RP140SA, Dual SI-18 DIY Subs, Behringer EPX 4000, Crown XLi 1500, Fluance RT Turntable/Sumiko Olympia Cartridge, Fire Stick 4K