I see the issue with ABX blind testing

I have a large variety of cables I purchased over the years. Not very expensive ones , no lamp cord, many very nice Chinese cables that would cost a fortune if they were made in Europe where I live. Anyways. 

I have been extensively listening to them all, for long periods of time, to the point that their performance has become very predictable. I can tune my system to a different flavor, I know exactly which cables to use. Predictable, repeatable results, both good and bad, that's no placebo. Why would I ever need a blind ABX text? Why can't people understand that, if our brains are indeed tricked by "situations" or "context", the stressful blind ABX teste with short bursts of music is certain to influence those brains - in a bad way- just as much as the (widely inflated) expectation bias? 

How is it that we see black on a white projection screen?

@audphile1 You say I wasn't there at the original recording, well I was I spend many many many many decades recording sound all over the world at the highest level in studios, churches, opera houses, castles trains and city streets I do know how the actors voice sound when your having lunch with them and understanding the differences when you're recording them with a different microphone than you usually use or listening to them on different monitors. The differences are not about cables or even the level of noise in the preamp the differences are acoustic.

In recording the limitations are always acoustic, the microphones you use are determined by how the instrument or voice sounds in that room at that level with still more considerations about the public address operator and his system and how loud the bass is and where the drummer is or on a movie set where the electric generator is that you can't move and it's to close to use your favorite microphone. Just like in recording acoustics is number 1 in playback acoustics is number 1 the speakers are like the microphone (use the best one you've got) the playback environment is like the recording studio it makes the most difference. When someone wants to sell you an expensive cable smile and nod then look around your room where you can improve your acoustics. 

@mahgister Always talking about acoustics, he is right and I say that with a unique perspective making recording all over the world and listing to my own recording all over the world. 

With usual my computer speaker (Bose companion 3),best sound (0:17), 2nd best (0:50), Worst (1:08).

This shows the difference between listening to sound where we know what we're hearing and can be influenced vs a blind test. I was falling into this trap when I first put the Transparent cables in place and though it took 15 minutes I was sure that they sounded better. Later after swapping back I could see there was no difference. 

My dealer says that no one has ever returned cables after an audition in his 45 years experience. His opinion is that Super was not a high enough level to notice and he would like to bring by Ultra or better and witness the swap and resulting sound himself. 

In my experience there is a very strong motivation to hear an improvement because you want your system to sound the best that it can and if others say that better cables produce better sound then you should hedge your bets and get the best cables you can afford. I'm willing to bet that a second sub will have a much bigger effect than a cable swap at a fraction of the cost.

Thanks for all of your responses.

Adding a second sub is almost always a great idea, and if you’re having difficulties hearing significant improvements with much pricier cables then I agree you will almost certainly hear a bigger improvement with a second, properly dialed-in sub.  FWIW.