If you have a sub, then you generally want all other speakers set to small anyway. If you are listening to 2-channel music, then you should only be driving those front 2 channels (I know that is sounds redundant, but some people miss the obvious. LOL) and then they can be set to large. Then you aren't driving a center, surrounds, or sub (yeah, yeah, I know... The sub is more of a "line out" vs power.)

Farewell - June 4, 2020