Hi, I just purchased a pair of Cornwall I's. They have two ports on the bottom, not three but both serial numbers have an "S" which I thought designated 1978? From what I've been able to dig up it was up to 1975 for dual port then they changed to three and never went back? I'm also confused about the "Type" these show CD-BR, when I looked that up it was for custom decorator raw birch without grills, the front finished in birch but mine have stock grills w/rectangular "KLIPSCH" badging. I'm completely confused and haven't even popped the back off yet to see inside.
The serial numbers are 14S751 14S749.
Any help would be much appreciated.
BTW, these are magnificent, I wish to be buried in them.