Hi people hope someone can help as it's driving crasy, ok I've just moved home and have been resetting up the system (fairly old but worked perfectly fine) I'm currently running Onkyo 875 Av ,mission m cube system and B&W 601 as my fronts , so I've set every thing up as normal and I'm getting hardly anything from the sub???? Seems like the sub has gone into limp mode??? The frames are now taking all the bass (yet I've not changed the amp settings at all) , is it the sub ? Or the amp ? If anyone out there has an answer for me I would be truly greatful.