You can check PSI Audio site. They list a bit of details on their Platform 3.
This weekend we went beach camping and I had it running off the Crescendo 3500. Did some occasional sampling for curious friends running the Crescendo at full tilt with what the clip light indicated soft clipping on harder hits. Friends were wow'd! On top of that I played the system at moderate levels for hours and hours on end for a couple days. Great daily ground pounder for sure.