thosb
I have spent time with Audioquest Mont Blanc and Volcano speaker cables. Both were excellent w/ the CS 2.4SE, CS 2.7 and CS 3.7 models.
Honorable mention goes to Audience AU24 series and Transparent Audio MM2 series all of the way up the mighty OPUS, in other non-Thiel systems, over the years. I have read about Acoustic Zen being a sonic match on Thiel Audio loudspeakers. Duelund is a modern favorite with the D.I.Y. crowd (I have not spent any time w/ AZ nor Duelund).
Check in over on Audio Asylum for more interpretations of Acoustic Zen and Duelund cable discussions. I can report that Copper matches the best and is worry free. Silver, is a little more dicey on models CS 2.4 through CS 3.7 and requires careful gear consideration.
I wonder if silver is less dicey on CS 2.3, 2.2 or other vintage loudspeakers?
Happy Listening!