Hello,
I'm having some trouble with my R-51PM active speakers not automatically connecting to my iOS devices. When I switch the input to Bluetooth, it will not connect to my iPad Air 3 or iPhone, which have previously been paired to it. Instead I have to manually connect via the settings app on the iPad whenever the speakers turned off or switched inputs.
Automatic connection works fine on my MacBook Pro. I thought for sure that doing a factory reset on the speakers in order to delete the Bluetooth devices list and only connecting the iPad would work, but no luck.
I have read that iOS can be a bit dodgy on this but it should be up to the speakers to auto connect and as mentioned, it works fine with the MacBook.