If you can set speakers to small, you are doing bass management. Of course, without the sub, bass management settings are ignored.
See above.
Possibly as that depends on the player.
Yes.
Normally, yes but you can add it in the player or the AVR if you are using analog connections.
I hope that helps. More of my comments here: http://stereophile.com/musicintheround/music_in_the_round_44/