[silvercats]

for example, if we remove the original cable of a Shure se215 and replace it with another cheap cable, will it affect the sound quality?

 

[Dinerenblanc]

  for example, if we remove the original cable of a Shure se215 and replace it with another cheap cable, will it affect the sound quality?

If a cable is cheaper in quality, meaning more impurities in the metal or just cheaper metals, yes the quality will suffer. I believe Shure's cables are nickel plated copper, so use that as a reference.