Nope, if they said that it has 64dB then it has 64dB and I have no reasons to doubt. In reality the gain stages sum 84dB and 20Db is eaten by RIAA. I do not know how they got from 3 stages of
84dB but if they claim that they did then they did.
"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche