Hallo Rudolf,
Usually I buy my IC’s from Tubulus or Grimm Audio. The latter begins to develop some attitude. The reason I make my speaker cables is that the same quality would be to expensive and still not good enough. I have a specific set of demands regarding speaker cables, since there’s length, current, dynamics and bandwidth involved.
Your suggestion of “clamping” the bare cable in the terminal is a no-go as far as I am concerned. I am open for a debate regarding spades or bananas. I prefer banana’s while they are easier to swap and there’s less mechanical strength involved.
Hope this answers your questions, always open for new ones… 
Groetjes,
Ronald
P.S. All my cables are high quality, oxygen free copper with silver coating and Teflon insulation. Same goes for connectors. I always use balanced XLR. Never RCA…! You will not find any SE device in my house or office, besides maybe the microwave… 