Just purchased a freshly serviced Nait 5, an immediate reversion back to something approaching hi-fi sq after living with a Harmon Kardon hk6500 for 6 months or so (not slating that amp - it probably needed some attention), and such a relief to have remote control again! Anyway, the amp is fine when playing cds, but as soon as I connect my streamer (Pioneer N-50) the amp emits low level buzzing/humming sound, not audible when music is playing, but annoying when it isn't, as the old dictum goes, 'leave Naim amps on at all times'. The amp buzzes as soon as you connect the streamer, even if another input is selected. Any fixes for this, or just an explanation? I listen wirelessly through the streamer.