Shakti Stone?

My dealer is sending me one to "audition" It will be tried either on my Pass Aleph-3 or Rogue Audio 99 preamp.The 99 has an outboard power supply.The 99 has 4 line-stage tubes and 4 phono tubes.With the outboard power supply with the 99 can there still be a chance it will do its magic or is the Aleph-3 the likely candidate to wear the stone.Has anyone had any big improvements with a Shakti Stone??