I don’t think anybody who has commented in this thread is confused at all about it but there may be somebody out there who will come upon the thread while searching online about issues with their own setup. They may have set their own speakers to Large(FullBand) but not activated LFE+Main(DoubleBass) and cannot understand why the sub is not active. It may be a help to them and save a few speakers.:)\n\nI agree. Despite my confusion I still learned more than I knew before participating in this thread.