How do you know when a stereo sounds good?

When presented with a proposition that is demonstrably false, I’m probably obtuse as well.

As @roxy54 noted, this self-awareness factoid - despite being a falsity in itself and a convenient deflection by the OP - does not address the primary and fundamental error and is completely irrelevant and/or has no meaning in the context..

It seems that I am in the minority of people who recognise speech that is intended to persuade but has little regard for truth.

I know it’s good when I have to switch one of these in for extra long listening sessions. (Pic of toilet seat)

@dekay  Me too. When having a restroom break is the last thing you want to do.

When a system has the ability to electronically resurrect dead musicians & they are in the room with you. 

Perhaps I'm beginning to understand Mr Denney's target audience.

I get what you’re asking. But it’s close to impossible to answer. If it sounds good to your ears then it’s good. You can listen to other systems in other rooms and it will surely sound different. But is it better? Possibly but the only way to tell is to listen to it in your room. Not always feasible. For me, I’m over the top with my system and that’s all that matters.

When my mind stops wandering as it usually does, and I am captivated by the performance, music, or noticing something wonderful about a composition that I thought I knew well. Presently, I am disappointed with the system that I have, and need to rethink my approach. So yes, I know when I am NOT happy too.