The X250BT heavily markets its Bluetooth functionality. However, users frequently reported random disconnections from headphones, soundbars, or smartphones. The receiver would show “Paired” but fail to stream audio after 10–15 minutes.
The does not support network-based firmware updates because it lacks an Ethernet port and Wi-Fi . Unlike higher-end Denon models, this unit can only be updated using a USB memory device if a service-level update is provided by the manufacturer . denon avr x250bt firmware update fixed