I've got a Acton II and a Stanmore II speaker. While I can pair them via Bluetooth, the ambient-setting does not seem to work. Even though they're NOT paired to play stereo-sound, they do play the sound as stereo. And since I've got the speakers in different rooms it's not optimal.

I've tried to pair them as stereo, with the same results. I can force Spotify to play mono, but it does not work if I want to play music from other sources.

Suggestions?