I’ve been driving my new 2019 ES 350 for a few weeks, and can’t figure out how to improve the audio, which seems only to come from the front of the cabin, above the dashboard. There doesn’t seem to be any rear speaker. The fader bar in the controls, if moved to the rear, almost completely mutes the audio. I just turned in a 2016 ES 350 and it definitely had a better balanced audio performance. Maybe there’s a wire not hooked up? Any other ideas? Could this just be “the way it is”?