The amps were made by Destijl.
The Revo was produced for Ampman...
The 35.1D was produced for Resonant Engineering...
And the 1600M1 was produced for us, Better Audio.
The three amps were close cousins, same boards, same features, different cosmetics.
Unfortunately, Destijl made the decision to stop offering that amp platform as a whole, and as such they are unfortunately not available anymore.
It is a bit of a shame, as that amp was very powerful, and offered some really nice features, a nice preamp stage.
Oh well.