I just got new Bose Companion 5 speakers, which sound great. But they tend to go to "sleep" often. If no sound plays from them for a few hours, it'll go into "sleep" mode, which means the systems is on mute. Then if I play music, the speakers don't "wake up," and I'll have to touch the touch control thing to wake them up. Anyone have any suggestions to fix this? Thanks in advance.