On January 12, 2021 at 21:12, BobL said...
I think if battery power was ever good enough it would be great to have a wireless active system that is battery powered that could last a year before recharging/replacing. You could have the display also have the surround decoder and send the signal to the various speakers/subs. You wouldn't even need a processor. I don't think battery technology is good enough yet unfortunately.
Batteries would need huge reserve capacity and if you think about the battery banks in yachts, they work well, but the large ones are bulky and expensive. Fortunately, the ones for an audio system have a good amount of down-time, so a charging circuit could be built-in and operate on a 12V (or 24, 48V feed), on speaker wire if the current isn't too high.
