I recently left the BBC where I was a post production supervisor (on Eastenders), before that a sound recordist.
However, I got bored of London and the 9-5, so now I do up particularly knackered houses - it's funny that my bad back has gone now I no longer have to sit all day! Must be the demolition hammer.
And I got into hifi through music - played the piano from age 5, then took up bass at uni where I played in various bands and DJed (and got paid for it!).