Quote Originally Posted by BadAssJazz View Post
If the Polks are a sub + satellite speaker system, I would set all of the sat. speakers to "small." The point is to have your subwoofer handle the main duty of delivering the bass (LFE).

It's not about the size of the speakers per se, but their bottom end extension.

I doubt those Polk sat speakers can deliver convincing bass. You're welcome to test the theory. Just put on a movie like Master and Commander: The Far Side of the World, turn the volume all the way down on your subwoofer module and just listen to your speakers. Instead of the room-shaking boom of cannons, you'll likely hear the "Ppfft" of a hamster passing gas. Setting the sats to large will inevitably reveal the weaknesses in those speakers, as opposed to letting your sub shine.

FWIW, even with my main speakers -- which can put out respectable bass -- I configure everything so that my sub is doing most of the work.
I did finally get a response from POLK but dont know if to trust them. see below. does it make sense?

"Actually having the RM6600 satellites set to “large” is correct. The satellites contain a built in high pass filter preventing them from playing sounds below 120Hz. The problem when setting them to “small” is that the filtering imposed by the receiver would cause “double filtering” with the speaker’s built in filter causing a gap between the upper frequencies produced by the sub and the lower capability of the satellites."