The RS150B lags a lot when playing 4k video. Videos played from an internal SSD or network lag strongly and freeze every 10-20 seconds. It’s the same with 4K 60fps Youtube videos. I use very fast, 1 gbit/sec wired internet and I don’t have this problem on any of my other devices at home, only Hifi Rose. Earlier I had a Rs250 device but it did the same thing. It is not possible to play 4k video in watchable quality.
