Isn't DSPeaker only for stereo (they have a separate subwoofer unit too)?

ARC, at least in the MRX-1120, does all 11 speaker channels, plus the dual sub outputs.

Also, have you seen my report from my 7.1 setup? There is a link a couple of posts back about my ARC correction. Pretty amazing. Not sure how much better another product would be, at least for my setup and my room so I haven't looked into anything else.

Farewell - June 4, 2020