crwdns2934241:0crwdne2934241:0 S W

crwdns2934249:0crwdne2934249:0:

So according to SONY, the speaker turns off when there is no signal or operation.

http://sony-eur-eu-en-web--eur.custhelp.com/app/answers/detail/a_id/28962

Best simple hack ever:  Play a recording of silence that loops indefinitely.

You can probably make one yourself, or buy it off if iTunes.

https://www.engadget.com/2017/08/10/silent-10-minute-song-itunes-car-stereo-trick/

crwdns2915684:0crwdne2915684:0:

open