Jeff - Gary at Coherent Source Service is your resource.
My comments are for historic background. Eminence made the woofers for the models 01, 01a, 01b, 03 and 03a. That was their 10KPHG8GX which was later replaced by their 10101. The T-S parameters of both are unknown to me, but it is a drop-in replacement. Eminence was the first North American Klippel user; the 10101 was an early Klippel assisted design. A peculiarity of the model 03 is that it has both a port and equalizer and the EQ was an upcharge option. Based on reflex performance we decided to drop the port and have sealed bass on the model 3 and upward. The later CS2 incorporated reflex bass for lower cost. Reversion to reflex bass in the 3.6 is controversial to me. That's another story.
Harry Pearson himself favorably reviewed the 03, concluding with "this is a product from a young designer whom I predict will become a driving force." I paraphrase from memory.
The CS3 (and onward) had a Vifa woofer. My recently acquired 03a pair has Vifa model 10MD-19-08 (8 ohm) woofers which was the CS3 woofer (in my memory.)See what Gary says and may have.
Here is the closing summary from our 1978 literature.

