There is a chance I may be trying a "phantom" center with my next set of mains, and wanted to know how the 990 reacted when it got a DD signal, and sensed no center channel connected. Will it default to applying DRC in this case, and if so is there a way to force the 990 to not use DRC? Not sure if this is exactly what Grok was asking many moons ago, but if more was learned on how DRC and Theater Comp in with the 990 maybe this came up.