If you use the remote’s power button to power down the speaker set, keep in mind that you have instead activated power standby mode. The LED indicator light will turn off but the physical power switch stays on. The only way to “wake” the speakers is to use the same remote power button or holding the clickable volume control knob down for multiple seconds.
You can only connect audio source devices with a compatible audio output format. For example, USB and HDMI cannot be directly connected to this model’s active speaker input ports.