The Audio Return Channel (Circuit) has no special function in regard to a 12 volt on switch being available on the soundbar. it either has such a circuit or doesn't, far as I know. There would be no reason to kick on your TV to play a sound file, for instance, so its unlikely a game console or soundbar would include an auto on circuit for the TV, even if the TV had such a capability. In reverse, most consumers would find it annoying to have the game console fire up every time the TV was switched on, so It is doubtful the manufacturer would waste money to include such a function. An auto on switching feature (CEC) would make more sense on a soundbar to turn the bar on when the TV is turned on. If yours does not seem to,read your manual carefully.