I use it for 20 years!
He pushes Elipson 402 (balls) with a passive subwoofer Warfedale I added, despairing of finding Elipson resonators.
Décoiffe dynamics, the rise time is simply stunning.
Before I used it on AR 3A (low efficiency) the result was so good!
What is amazing is its reliability and robustness.
Before finding this amp, except the monsters ampzilla or Accuphase, I could not find anything comparable.
A tip, if you find a used one, please!
By the way, I use an old preamp ROTEL ... yes!