My amp a rxv596 yamaha states: If your center and rears are smaller then your mains set the amp setting as so. If not keep the setting as large. This is what I have, what is your recommondation:

cs250 for my center
2 rt16's for my mains and a couple m3II for the rear.

The speaker cabinets appear much larger in my rt's are they speaking about the speakersize it self??