Best answer by Airgetlam
Normally speaking, a grouped speaker might be an answer, placed directly next to him, but the difficulty lies in the way that the Sonos system deals with surround speakers versus grouped speakers. Surrounds are on the lower latency 5Ghz band, which is short distance. Any grouped speakers are on the 2.4ghz band to provide longer distance, since in normal situations there is no guaranty the grouped speaker is in the same room. This causes an extra delay for appropriate buffering, which causes the grouped speakers to be slightly behind the PLAYBAR and surrounds, and would likely create a “stadium” like effect.
I doubt that there is enough demand for this kind of thing for Sonos to invest in changing their base technology, but I will say that it has popped up a few times over the last couple of years, and since Sonos doesn’t tell us in advance what they’re working on, generally speaking, who knows.