If it's a ring it runs both ways simultaneously, but you'd want the Hi-Fi socket dead central in the ring otherwise one leg might supply more current than the other causing a massive drop in SQ.A closely related question is, “If you have a double socket, does the left-hand outlet sound better than the right-hand outlet, or vice-versa?” I suppose it depends which way round your ring main the electricity stuff runs. If it runs clockwise, then obviously the outlet on the left gets first dibs at the electrons. This may be different in the southern hemisphere. Or maybe it depends on which phase your leccy is connected to. So many questions.