I was all set to sell my Marshall JMP-1 preamp. I tried it direct with impulses, and it sounded like crap. I tried it with the emulated outputs, and it sounded like crap. I decided to do one more test before throwing it on the bay... plugging it into the power section of my Überschall.
Man was that a mistake. It sounds glorious. Now I have to track down a Marshall rack power amp for it. So much for clearing out space in 2016!