Anyone know if the 100mm and 150mm drivers in 2013 doors are sealed-back or open to the volume of the door? Maybe the larger/lower one is open, and the smaller/upper one is sealed so it doesn't see the door volume? Is there a difference in this regard between the standard and HK configurations?

I could open a door panel and look, but thought someone might already know, and I can't tell from pictures I've found on NAM and vendor sites.