Thanks for the info.FXD-Tim said:I had a C1 and it had indentations in the foam for the speakers of my chatterbox headset. The mike was a bit difficult to mount. I had to take the neck band out to mount and then put it back in. I read somewhere that someone got some industrial strength double-sided tape for mounting the mike. The chatterbox web site has instructions for installing their headset in a Concept. I don't know if the C2 has the same indentations. As for noise, I wear earplugs. I like the soft wax style.