Well, we could start with the magnets, as I posted already. The rest of the driver may well be made in the US but not the magnets.
The veneer cabinets are sourced from China.
The metal grills for the cylinders are probably sourced from China according to SVS.
Thilo (TC sounds) had almost all of his components (EDIT for TC1000 as I bought those drivers from him) imported from China, magnet, basket, T-yoke, top plate,.. He basically operated a design house and an assembly line. Logistically, won't it make sense to just assemble them in China in the first place. Well, the end of the story is that he has to do what he has to do.
TC sounds is the most friendly company that I worked with. Thilo can take 100pcs order. Adding a sensing coil to a driver is such a trivial thing and yet most American companies would not do it. I talked to Eminence and the first thing is they asked how many I am going to order. Well they expected me to say 1000pcs a year. Don't even mention Cre****ce who requires a bank statement to show how much money you have in the bank before even talking to you. They all have the reasons the do what they have done. For us (small business), we either have products, or we don't have products.