Setting rear speaker size confusion

[gazzaraki]

Currently running a 5:1 speaker setup with two large B&W floor standers and Wharfedale Diamond 9 centre and surrounds and was wondering wether the rears in the setup should be set to small or large.My Marantz(SR7500) MRAC setup selected large but the Wharfedale manual say always set your rears to small.I'm just wondering wether i'm getting enough out of my rears?? and will there be any difference from one to another??.I have also noticed that most of the time the amount of dialogue coming from the centre varies from disc to disc.QUite noticable on music DVD.Any thoughts???
Regards to all
Gary-NZ

 

[Uridium]

As per this thread. Set ALL your speakers to small and let the Sub do what it does best.

http://www.avforums.com/forums/speakers/1003900-centre-speaker-crossover-point.html