I have a Tournament Edition A40, with Mix Amp TR PRO and the microphone works, only when the sidetone is disabled completely. That said, the headset has a distortion, like interference when is connected outside the Mix Amp, because only the mix amp has the ability to control de sidetone, so if I want to use it has a headset for taking calls on Skype, this is how it sounds like to others. WARNING: don't use headphones to listen to this, may injure your ear https://soundcloud.com/dolanshion/warning-dont-play-this-with-headphones-is-just-an-example/s-rTtW4 Another one https://soundcloud.com/dolanshion/another-test-astro-a40/s-Pm5vJ I already tested with multiple cables, with no avail. I want to know if anyone else has this problem or if it the headset that is defective. Thanks.