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OK, remember, this section indicates no question is dumb. Also, I just found this site yesterday, have extensively searched for my answer but haven’t found it, and I am a first time poster.

I had to get that out of the way before I asked my question.

My wife has a 2011 Expedition Limited EL, and it has the Sync, Nav, and subwoofer. I am getting ready to upgrade the audio, but I need to know if the system is the Sony or non-Sony system. I briefly looked through some of the manuals, as well as on and through some of the radio functions last night after my boys’ football practice, but I could not find a definitive statement as to which system we have.

How can I find out which system we have?

Thanks!
 
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