Axiom Home Page Forums General Discussion Home Theater why does every say set to 'small'

When the mains are set to 80 then everyting below 80 is sent to the sub.

When the mains are set to large and the sub is set ON then the mains are getting the full bandwidth AND the full bandwith is sent to the sub (where it's LFPed at 80). On some receivers this option is called "Double Bass".