Hmm Jerry may need to post a picture. Ironically I just purchased a 909x and returned it recently. I had a similar white adapter but I didn't pay attention -- I presumed it was AC-DC. Universal Radio says the included adapter is also 9V AC. Perhaps they did finally change it to a DC supply.
To add to the confusion, a separate sheet was included with my printed manual advising that the U.S. Dept. of Energy was now requiring all external power supplies to be the switching type, ostensibly to conserve power. That might account for Sangean having changed their adapters, although in my case the notice accompanied a radio that does
not use the switching type (thank goodness). What seems at first to clear this up is that the radio pictured on the manual's front cover is a white one, whereas I have the black model. Maybe I was given the wrong manual, but it still specifies an AC to AC adapter.
In the notice, Sangean admits that the switching adapter will cause RFI, and they recommend keeping the radio at least 1 foot from the adapter. Actually, 1 foot would still be too close. The notice goes on to suggest that if the switching adapter isn't the type supplied with the radio and the user wants to purchase one separately, he should refer to the last page of the manual for the specifications. That page in my manual says 9v AC.
Kudos to Sangean for helping to make this a lot less clear.