ISS™ -function
Both loudspeaker models have a power switch on the back panel. Set this switch to the “OFF” position when the loudspeakers are left unused for several days or when connecting or disconnecting any cables in the system.
When the power switch is set to “ON”, the ISS™ Intelligent Signal Sensing function powers the loudspeakers up when playback begins. The mode indicator light on the loudspeaker lights up and the
playback resumes after a slight delay (<2 seconds).
ISS powers down the loudspeakers after the playback has ended and the loudspeakers go to standby mode. The power consumption in the standby mode is less than 0.5 watts.
官方说明书看了下,真没有ISS

,强制省电。。