Just saw notes about these new speakers from EV: Everse 8 battery-powered speaker. They might be of interest - from various reviews, they seem to have lots of positive attributes. Not 'cheap' though. Look promising though ...

Info from EV:
https://products.electrovoice.com/na/en/everse8

Lots of reviews and video reviews exist out there, such as:
https://www.youtube.com/watch?v=u3r3dwUIFN0

-Jim
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Genos / Tyros5 / HK Lucas Nano 600 / FTB Maxx 40a / EV ZX1A / Rock'n'Roller cart / Hauptwerk virtual pipe organ / misc other audio & music toys