Hi, welcome to Arylic forum. For B50, you have to power it up and switch to Bluetooth mode to connect. If you want the feature like Denon Ceol N9, you could leave B50 alive in Bluetooth mode and don’t cut power. The B50 will turn off AMP to save power when detected no input for 60 seconds. And you could think it’s in standby mode, but with LED lighting.