thanks for response Jocke. I was more looking for the sound that fits my music. I tried a few cabs from recabinet that were syx format. I will look for others. What I understand they use Dynamic Response Technology, what is different a little bit from what Nebula uses and it might require multiple IR's for a single cab, so my initial guess was that those internal cabs might work better, but again it is a trial and error route.