Muted? <Control>+M to toggle, or tap the small speaker icon at left side of MC's volume slider to show the Volume menu (first item is Mute).
Note: When muted and playing, MC's Progress Bar continues to advance, while the Spectrum Analyzer display in the Player Bar area vanishes.
Other settings in the Volume menu:
"Internal Volume" is normally used to control level with MC.
"System Volume" gives control to the OS volume control, which must be turned up to hear anything.
The WiFi light is lit on the unit so it seems to be connected OK.
I have it hardwired.
WiFi
and hardwired? Which mode is active and being used by MC?
- What does the WiFi light lit actually indicate? Try shutting down the MC Server, then turn off the iPhone. Does the light remain lit? If so, it may simply indicate the RS250 has detected your network and is visible on it. That is required, but not sufficient for MC WiFi communications.
- If wired, is proper driver selected in MC?
- Does the RS250 have a DLNA/UPnP wireless mode? That is needed for direct MC wireless playback. I don't see the DLNA logo in the product literature, so odds are it does not provide a DLNA renderer.
- My guess is that your iPhone connected by Chromecast or Apple AirPlay, neither of which are built into MC.
- There is the BubbleUPnP Server workaround which effectively enables Chromecast for the MC Server. It is discussed in many threads in the Interact Forum.
- You might try a MC Android app (MO 4Media, BubbleUPnP for Android) to see if your phone, as a remote, can reliably cast the MC library to your speakers. Personally, I prefer the BubbleUPnP Server solution for MC playing to my old Chromecast Audio dongles.