I recently purchased the Eris 3.5BT speakers and have also added the Sub8 to it. I have noticed that the 3.5's are not sleeping as described in the user manual. It says that after 15 minutes of non-use the blue light should turn red and they go into a kind of sleep mode. I am not seeing this behavior. Is the Sub8 somehow feeding power to them so they think they are still in use?