Hello, a few weeks ago I purchased a Yamaha Silent Brass Mute for my cornet, on using it for the first time the volume from the head phones was very low even with the volume at its top position. But I thought thats how it should be, after all it is called silent brass BUT its just as loud (or should I say low) when I dont put the head phones on. I have since looked a few Youtube clips and realise that the one that I have must be faulty because on some of the clips I find somone has plugged theirs into an amp and it sounds great. The one I have the amp will not pick anything up and when I tap or blow into the mute there is no sound coming out of the amp. (amp new and perfect as I put a keyboard through it) Does anyone own a Silent Brass, and do you get a decent volume through you head set...............Many Thanks Pete.