You should be fine with 85” TV with ARC Bar. I am using one with a 78” TV. Please ensure atleast 4” vertical gap with TV and Sonos bar.
TV size for Sonos arc
Is 85" too large for Sonos arc imaging? In pursuit of decluttering I'd like to replace my surround setup (Bryston SP3, 2 NAD stereo amps, and 4 LS50s) with a Sonos arc, leaving only a single rack of Ayre gear and KEF Reference 1s for stereo. An Ayre stereo amp and 2 JC 1 monoblocks sit on the floor about 2' from the wall on which the Sony TV is mounted. Would they interfere with Sonos imaging? I hope to sell the JC 1s as part of decluttering.