Have just the beam, no other speakers butwatching 5.1 sources isn’t so good. Stereo is great. But 5.1 seems to have ridiculously low volume for some frequencies or channels.
The example I give is watching Dunkirk in 4K HDR via Rakuten. In 5.1 the start of the movie is silent until you put your ear right next to the beam. You can’t hear the paper rustling in the wind at all. Or the background music a bit later. It’s in the mix but so low you can’t hear without turning the volume way too high.
Same with amazing Spider-Man via UHD player and some films on sky hd. Some parts of the mix are so loud but others so quiet they essentially aren’t even there.
Stereo seems ok generally. But obviously I’d far prefer DD 5.1 even though it is downmixed. My old soundbar had no issue with dd5.1 from these sources.
By the way I should add that the sound is awesome when the loud channels kick in but too quiet the rest of the time. General TV and music both superb, so I think this is a software issue more than anything, but I’m no expert.