Wow, I would have liked to have had a pair of those D-9s.
As Ken mentioned, I have a pair of D-1s from that same era. They are two-way speakers with a tweeter and an 8" woofer. Up the line there were the D-3, D-5, D-7, and then the D-9, which, I believe, had a 15" woofer.
Sadly, in the process of moving the D-1s last week, I discovered that the woofers are shot - they crumbled when I touched them. Now I have to learn about replacing them. Thank goodness for Mark's woofer measuring thread a while back.
