I would like to connect two (similar) bluetooth speakers simultaneously to my Sony Xperia XZ3 and use them in a stereo configuration.

Through the forum I understand that this is possible setting the XZ3 in developer mode. In this mode it is possible to increase the number of connected bluetooth devices, as well as to alter the version. But, then, how do you connect these two bluetooth devices simultaneously? I can connect one and, if I try connecting the second, it disconnects from the first one (and continues to play music from that).

Can I connect both and have one acting as a left-speaker and the other as a right-speaker?

Thanks!