I upgraded from Sky HD to the 1TB box which had constant sound dropouts when using the optical inputs on my amp. Lots of calls with Sky and a couple of visits from Sky engineers didn't resolve it so they recommended a further upgrade to the 2TB box. And its exactly the same! Sky have no further advice to offer so I'm stuck in a deal I can't now get out of. On the positive side there's no sound issues using the AV input so I use this for TV and Spotify Connect works well on the digital input.