04-24-2017 02:34 PM
I almost gave up on this one when I found that the rules only triggers a message when a power threshold is reached.
Used TFTTT to create the following recipes. Had to set the on/standby threshold to 50w. It takes about 10-15 minutes before the subwoofer is turned on or off. However for the intentions of making sure that the subwoofer is turned off when not in use, it is good enough.