I’m also puzzled as to the description of the A21 as dry. I think as audiophiles, we get locked into mindsets about sonics and characteristics that we come to value or loathe. As do amp manufacturers, and lets face it, none of them are perfect and neither are we.
So what one person may decide sounds dry, is really hard to prove or quantify. So we trot out our resumes, and how many high end amps we’ve owned, and how many decades we’ve been in the hobby, all done in order to win a debate, that we are right, and all others are wrong.
The truth is probably somewhere in the middle. And there are probably 20 to 30 or more top shelf amp manufacturers. Parasound is one of them. Just like all the rest, they tailor the sonics to achieve whatever their goals are. Either you like them, or Pass, or Krell, or you don’t. And many people will come up with a different favorite.