For the 2008-11 Navigation system there is a menu screen that shows a subwoofer on/off and a center channel on/off.
I know that a center channel is not offered in the US. However, I questioned the Subaru.com contact people and they said that it was available in other markets.
Could you see if there is any information out there on this speaker? The DVD player sends voices and background noise out the door speakers which makes it difficult to hear people speak. A center channel is required to fully appreciate the system.
Any help would be appreciated.