My Denon only allows for ONE setting for all speakers, so currently I have all speakers set to small, with a crossover of 80hz. Keep in mind that even with a crossover of 80hz, the bass does not just STOP at 80hz, there is actualy a slope or blend/transfer to the sub. Even bass down to 80hz is powerful and the 80's or 60's handle it great. The sub does a better job handling those lower freq's because the larger driver can move more air in the room.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85