Hi Guys, I noticed that one of you guys posted a review in about the WP100 and saying that you felt it was a little insensitive on the input. I have noticed the same. I did hear that there is a jumper pin inside that sets the sensitivity of the input. Haven't tried this yet. The other point I can relate to is the valve character control seem to do alost nothing to the sound. It's almost like this part of the preamp is smokey windows. Any ideas? Mark.