But what you propose without controls really isn't a scientific test.
I said it was for fun.
You can substitute a pair of regular RCA cables instead of changing out to the expensive connect as your Placebo or just not change out the cables during a supposed change out of cables. HIde everything behind a screen. A score card rating specific vocals, cymbals, instruments, clarity detail, imaging, soundstage. Identifying if they are in the hear a difference or not hear a difference camp. Or any other conditions some members may recommend.
You can argue that it doesn't have the controls you want. But you can recommend other conditions if you want. But hosts should draw the line if it gets too complicated.
It's just more scientific than the word brawls we have in that it involves hands on testing. The claims of science here pretty much discounts observations by others without knowing what others experience. How scientific is that?
What I'm proposing is a step beyond the usual banter.
Let's do something and let the chips fall where they may. It can be a fun attraction for the members.
You are no worse than where you started and you can incorporate other changes in the future.
There is not going to be an ideal testing situation except maybe in a audio lab. And as I said, you're not going to satisfy everyone. What I'm proposing is one step forward instead of the same business as usual.
What is at the basic issue is -- can we hear a difference?
Then trash ... erm ... analyze the results.
Besides, if you don't believe there is a difference, then it would seem the odds are in favor of not hearing a difference in most scenarios.