Investigation

The old saw that schooldays are the happiest of your life, jumpers for goalposts an' all, has its parallels in hi-fi. Ask many an enthusiast of a certain age, and they'll go a bit misty-eyed at the thought of their first 'proper' system, bought with a mixture of summer job earnings and that first student grant – yes, once upon a time you got given money to study.

Jean-Michel Jarre likes what he hears. And it's not only the sound of his new album, which he is playing to an eager audience packed into the Audiofast room at the Audio Video show in Warsaw, but the very audio system on which it is being played.

'My new album is a good test for loudspeakers,' he says smiling, 'because I know that it has lots of different frequencies. This means that it's hard to hear the whole effect on some hi-fi systems, but this one is highly capable.'

My shiny new hi-fi has all the usual knobs, buttons and meters on the front, and all the usual analogue and digital input and output sockets on the rear. But there's also what looks like an overgrown telephone socket on the back, labelled 'Ethernet'.

I'm assuming that this is for service engineers or connecting the component to a PC, which I don't want to do. I just want to continue listening to my music from high quality sources, through my trusty big box speakers, without getting into the hassle of computing.