I just experienced the issue of not being able to connect my SB 513 speaker to my iPad Music.
Pairing worked perfect for many months until last night after I accidently pressed the middle button on the SB513 - which connected the SB513 to Ipad FaceTime disabling my Ipad Music & preventing Ipad Music from playing on SB513 speaker.
After lots of goggle research & giving up & trying again, I successfully reconnected / re-PAIRED my SB513 speaker to play my iPad Music.
1) In Ipad SETTINGS, Bluetooth [on], Click on exclamation mark in SB513 which brings up the Question: Disconnect SB513 from this device. I clicked yes or whatever to remove SB513 from my Ipad.
2). I then followed the SB513 instructions for pairing to my Ipad & it CONNECTED.
Prior: I turned Ipad off & on several times with no success.
Turned off my cell phone that was pairing with Ipad Bluetooth. No success.
Turned off facetime on my Ipad. No success. END