Absolute polarity vs. planar/ribbon speaker placement

I think this may be a thread where Steve Hoffman or Humorem can give some useful information. My question:

What's the importance or the role of absolute polarity in a planar/ribbon speaker environment?

I for example have Apogee Caliper Signature speakers, which I think are sounding truly outstanding with my electronics (CJ tube pre-amp/Krell transistor power amp). Now, the soundwave which is generated by the ribbons or panels radiates in a negative polarity to the rear wall. Additionally, these speakers are not in a perfectly upright position, they must have a tilt back angle of some 5 or 6 degrees to the rear wall, which means that the signal does not reflect as a "perfect" (?) transient and may smear the absolute polarity direct radiation (if you know what I mean...).

Any comments?

 

Who cares, I've got Duetta's and they just sound awesome, I always wonder where the band is hidden.