Hi Colin
As a TQ Black cable owner, I'm appalled by the treatment you have clearly recieved by said friends/business partner.
I'm glad I have found this thread as was fully intending to move up the TQ chain. Which needless to say won't happen now.
Out of curiosity, and I don't really expect you to answer this, but where do you consider your LS-25 speaker cable to sit in the TQ lineup. No harm in asking 😊
No biased to my new cable, but you all will have to try it and see if it works for you. Sorry