is there a surround sound decoder for the 8000NEX?

I've found several 12v pioneer surround sound units, but none that I've been able to find specifically say anything about 8000NEX support or interoperability.

thanks

AFAIK, all NEX series head units are 2.0 subdivided into front and rear and dual sub outs are derived via electronic filtering... i.e. only 2 distinct channels are decoded from all digital media sources before running through Pioneer's digital audio processor, which has no virtual surround sound effect AFAICT.