How do you know when a stereo sounds good?

How do you determine that you enjoy listening to music through your stereo? 

I guess I'm not sure what you're asking. Taken literally, this seems to be asking for another perspective besides my own internal voice. It's like asking the question, "Am I in pain?" That's not a question I can make sense of without some kind of science fiction scenario.

If your question is, rather, "What can I do to experiment with my stereo to see if my experience changes for the better?" then there is a wealth of literature available, including many free videos on youtube, etc. 

@winnardt

You said: "It’s like asking the question, "Am I in pain?" That’s not a question I can make sense of without some kind of science fiction scenario." Can you elaborate on that paragraph? I don’t understand what you are trying to say.

The OP asked for someone beside himself how he could know if he was enjoying music. I said, that’s like asking someone else "Am I in pain." That sentence does not make sense to you. It doesn’t make sense to me, either. That’s why the equivalent sentence, "Am I enjoying my stereo?" is equally senseless. It’s an ill-formed question and cannot be answered. See, SEP, e.g. to read more.

I am a bit short on time, so I can say this, briefly and hope it makes sense.

OP: How do you determine that you enjoy listening to music through your stereo? 

I determine I enjoy listening to music in the same way I determine I'm in pain: I just feel and know it.

The puzzle to me was why someone with access to their own mind would ask this question. That's why my initial post proposed another way to ask the question. And those who have answered it clearly took it as posed in that other way, or they'd have had nothing to say. Gotta leave it there.

@winnardt

To you, there’s only one answer and the question was meaningless, but you can’t know ahead of time what the other answers will be.

No, that’s unfair; look back at my very first post which offers one other way to construe the question. Further answers have been interesting, too. So, no -- I’m not saying there can only be one answer. Give me some credit.

Can’t help advance you on the science fiction question.

@winnardt I could, but I tried and I have a day job so I'm tired of trying. Now that will be my last word on this topic.