Greg,
They do pry off. I had one of mine off, but the next one I tried didn't want to come easily, so I didn't bother messing with it since it wasn't broken. They started using this style in '98. I had these in my 2363 and I remember that little "8" thing in the center of it on our '97:
I had all of mine out in the 2363 because one side's speakers weren't working. After checking all the wiring and finding nothing wrong, I played around with the radio and found that pulling out either the volume or tuning button was the side to side and front to back adjustment. Problem solved! Why they have to make those things so complicated, I don't know.
You might want to hope your better half is there because if the cover doesn't come off easily, I wouldn't force it in the cold. You may end up breaking the cover. I can't seem to find a pic of just the innerds, but basically the speaker frame is goldish looking (I don't think it's brass though) and the speaker itself is black with the black cardboard like dish around it. I'm not really into speakers, so I don't know the technical terms for those parts.
Jon