INPUT SENS. of a M Levinson 29 in MV????

Does anybody know the INPUT SENS. of a Mark Levinson # 29 amp in MV?
Call Madrigal or Harmon International. They are very helpful.
If that is true THEY have changed. I am not sure if they have an 800# or not but I just suggested this route because I had to get a schematic from them when I had my 29.