I have the 990/7700 combo, Paradigm Studio 100s and the LFM1-Plus. The sub is set to bypass with 990 crossing the 100s over at 60Hz. Unless I turn the volume on the 990 up fairly loud the auto power feature doesn't turn the sub on. If I turn the sub on manually I immediately hear sound. This happens at times when the auto-on feature hasn't yet powered the sub on. Its like the auto-on feature isn't sensitive enough. Is there a problem with just leaving the power on all the time?