How to convince a newcomer

[Feanor]

I have a 13yr old son who is satisfied with MP3 on his 'phone and sits happily on the computer listening to downloads--to the exclusion of family and all else around him.
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Slippers On

... But you can't make it drink. Some people, including serious music lovers, never develop a taste for true high-fidelity. I often visit a classical music listener site, (link below): very few there are audiophiles, and few have more than entry level systems. While most buy on CD, (that's the nature of classical music availability), but quite a few are quite content with downloads, at least to sample music before buying the composition on CD. (Do they mention LPs? Never: to them, vinyl isn't relevant to classical music appreciation.)

Good Music Guide Classical Music Forum

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I will start the ball rolling by saying that:- "A good system, when you turn the volume up, still allows you to have a conversation!"

Slippers On

No!! Or, in any case, if I have the volume up, I want to listen not talk.