Here's a short video of playing Bias FX through the Audio Assault Dominator speaker cabinets. I'm not exactly sure what it does different than a regular impulse or EQ, but for a while now I've been using these when recording the line outs of real tube heads and combos. It doesn't just seem to get the tone shaping right, it seems like it makes the dynamics "act" right. Even the ear splitting nasty upper midrange of a real microphone/speaker cabinet pair comes through, as it does in this video, so much so that I know I can treat the recorded signal exactly as I would if I were using a microphone. AFAIK Bulldozer has these same cabs as well. Find them at
https://audio-assault.com/products/dominator