So I spoke to Swatcom and they advised that no you shouldn't be able to hear any back ground noise and that it sounded like feedback due to possibly a bad connection. Anyhow they arranged without quibble for the headset to be collected the following morning by DHL and that they'd report back...
Hi,
I've just received a brand new pair of Swatcom Active 8 headsets and on turning them on there's a quiet but audible background hiss like white noise even at the lowest volume setting. At the highest setting it's very audible. Is that usual or does my headset have a fault? I've an old pair...