@melle Not sure if I should share it here, but given you're involved and my respect to your effort, I'll just say it if it helps - it'd be cool if a BT speaker could _also_ "stands by" and connected to Bluetooth on demand when plugged in to an AC source - like the soundbars that you see for smart TVs that also "double" as "furniture".

I gifted this (standalone) to a family member recently - I explained the difference to the JBL speakers and they use it a whole lot more: https://www.samsung.com/de/audio-devices/soundbar/2-ch-soundbar-black-hw-t400-zg/