Thiel Owners

Those CS2.4 are mine. I am selling my entire system. I still have a secondary system but not quite as upscale though. I have not had any luck yet :-).  I am not looking to purchase any speakers to replace the CS2.4.  I probably will build my own.  

Andy - Unaskedfor advice, given in good faith: I would find it nearly impossible and at least thoroughly frustrating to design a first-order, phase coherent loudspeaker. It took us decades to develop and improve drivers to eventually cover 7 octaves with good enough behavior so that the long tails on the crosspoints would blend properly without over-excursing, resonating, burning out and otherwise misbehaving. The early custom drivers were developed with Vifa, who is no longer in business. Then we developed and made in-house, which are likewise unavailable. Since first-order xo is generally considered unfeasible, I don't know that suitable drivers are out there to be bought. 

I suggest you consider other options. A sweet alternative is the second-order crossover which manages phase integrity within a broader window, but to my ear does the job quite musically. Lots of high-end companies, as the lovely Thiel 02, take that rout.
Please keep us posted on your progress, whatever you do.

This information crossed my radar earlier today. ARC will be offering a SE upgrade for their CD6 and CD9 cd players starting now. A CD6SE offered at $10K and CD9SE at $15K respectively. For that kind of price increase it would have been good of Audio Research to include SACD playback. The CD9 has been my long-standing reference cd spinner during auditions.  A very fine player with a killer DAC for computer -based Audio applications.  Happy Listening!