I too am having all my friends say my mic is very quiet.
I have bent the mic so that I'm almost swallowing it just to get some audio from it.
I have everything in Windows and CUE up on MAX and yet its super soft :(
PS. Mine is like P4 in this thread:
http://forum.corsair.com/v3/showthread.php?t=149607
Yet its still bad, and now it just picks up my breathing instead too.