I recently bought the Metronic Zapbox and this unit was omitting an oscillating noise through my TV speakers. I tried a second unit and this was also causing the same problems. I tried this on 2 LCD TV's and one ordinary TV with two different aerials and all had the same problems. I know this is not a fault on my equipment as the original Freeview box did not make this noise at all. I will say the picture quality produced is superb, beats a lot of the other Freeview units out there. This could be a really good product if the manufactures could solve two problems: the heat factor and the problem the oscillating noise you can easily hear through your speakers.