Value, lack there of, and "High End"

[marce]

9 minutes ago, Ralf11 said:

While there is no electronic device boutique store - they all purchase from existing suppliers that everyone has access to, there is a substantial cost increment from testing many caps or resistors (not to mention tubes) selecting, and matching that some manfs. do.  Audio Research has a video showing this with comments on the cost of it.

Or just use decent high tolerence parts, 1% resistors are pretty standard these days... As for IC's most of the basic implementation is covered in data sheets, app notes and examples. The digital side is pretty mundane these days, the real "art" is in the analogue, its implementation, circuitry and layout, especially on mixed signal boards (that are very common in the instrumentation/control world.