The "falling asleep" scenario is activated after the Ceres BT speakers have been inactive for about 15 minutes. At that point, the LED above the volume knob will turn red and the speakers will go into the energy-conservation mode that puts the amplifier on standby.

Sending audio to any of the inputs, including via Bluetooth, at a normal listening volume will wake the speaker from sleep. You will experience about a ten-second delay until audio playback is heard. If you're experiencing a delay that's a couple of minutes, there might be something wrong with the input sensitivity of your speakers.

If you feel like there's an issue, you should create a support ticket through the following link: http://support.presonus.com/requests/new. One of the fine folks over in tech support should get back to you with some suggestions on how to resolve the issue.