I just three days ago received my Plinius SA102 amps (two in vertical bi-wire) I intend to write a review here once they are broken in, but straight out of the box the two major problems with Plinius are gone. The ground loop hum is no where to be found. The two SA 100 amps I had three years apart both needed the ground lifted. The other issue was the mute switch created a pop when I turned it off and on, that too is gone. Dead quite.
The sonics are improved even out of the bax. The bass is extremely tight and well balanced. The midrange is just as pure as any I've heard and the highs are clean and effortless. Imaging is beyond words, so much better than the SA 100.
The point, if your thinking of Plinius and Pass, check into the new SA-102.