I have paired a first speaker in Music Center (SongPal)using NFC for my Wireless audio setup, but I can't seem to pair the second one.
According to your mobile device, settings and network environment, you might be unable to pair your second speaker with your mobile device in the Music Center (SongPal) app using NFC.
If that's your case, please perform the manual Bluetooth pairing procedure for your second speaker.
For more details on how to add speakers to Music Center (SongPal), Please see this article .