Is Polk ever gonna go servo?

Hello all. In my travels, I have heard a whole lot of different subs and sub configurations. I'm just gonna keep this short and sweet. My favorite sub-type for blending to mains, not being slow or noticeable, easy to adjust, musical yet powerful and impactful to the "whole" experience of musical reproduction is a servo sub.

Is Polk ever gonna go this route....are they already?

What's the skinny?

Tom
~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~