It’s not just one part that’s at issue.
Using Audio Research Corp as an example, just a guess 98% of the electronic components in their audio equipment is imported from China, Taiwan, or Vietnam.
Going from memory the face plates are imported. ARC is basically a design and assembly manufacturer. Made in the USA? Well? Engineered, and assembled in the USA.
You might ask why doesn’t ARC buy the electronic components from manufacturers here in the USA? Who might that be?