I have a Tom Evans Vibe pre-amp. The fisrt version had a wall wart type power supply. Next came the Pulse power supply consisting of two box external power supply. I am expecting the next generation any day, the Pulse 2, with a single large external power supply. Each step has yielded massive upgrade to the sound floor. I expect the Pulse 2 to again go way beyond the previous version. I cannot comment on the single box vs two box approach. I can however confirm the importance of intelligent power supply in this hobby. For the sake of disclosure, I am also heavily invested in Isoclean equipment.
