Talk about going back in time. It doesn't even have a center-channel speaker to lock dialog in place for more than one person.... It must use virtualization for overhead sounds since the speakers have no upward firing drivers and there are only 4 speakers. No sub. It looks a bit like Apple Ear Bud equivalents (the old ones) for a living room (i.e. JUNK). Maybe it's FREE with purchase of a Sony TV?
Upgrades? D&M doesn't do upgrades (save the 8500 and
maybe if you have this year's model). Their idea of a software upgrade is you buying a new receiver. It's sad, but it's largely true.
I asked Auro Technologies recently if they could get an update to Auro-3D to D&M for older models so it could use the 7+4 mode with 13.1 soundtracks (i.e. Most people don't use CH/VOG but do use rear surrounds and so there's a 7+4 mode that uses the rear channels of 13.1 soundtracks instead). They said they make the drivers available for D&M to distribute. D&M chooses NOT to distribute them to older models to force you to buy a whole new hardware unit for $10 worth of software changes. My opinion is "F" D&M. I won't make the mistake of buying another one of their receivers again when they're so greedy that they can't pass on a simple codec update, even with a charge to upgrade it. I'd rather pay $100 to upgrade the codecs, than $2500 for a new receiver ($1100 for the previous year model when the dealers dump them).
There is ZERO chance anything older than this or possibly last year's models (meaning 2021 models) other than
maybe the 8500 and Marantz equivalent would get a codec upgrade option to something new like Sony 360.