I have an Audio Research SP8 preamp and run it to a Placette Passive with a 1/2 meter Coincident I/C. I A/B compared it to not having the Placette in the signal path, and my ears could not discern a difference.
I chose to put the Placette b/t the SP8 and the amp because I also run a turntable into the SP8 and did not want to have the phono signal going into the placette before it gets to the phono stage in the SP8. I also have a Wadia 861 going directly into the Placette without going through the SP8 at all.
Bottom line is that I believe the Placette, when used with appropriate I/Cs, is virtually transparent.
I chose to put the Placette b/t the SP8 and the amp because I also run a turntable into the SP8 and did not want to have the phono signal going into the placette before it gets to the phono stage in the SP8. I also have a Wadia 861 going directly into the Placette without going through the SP8 at all.
Bottom line is that I believe the Placette, when used with appropriate I/Cs, is virtually transparent.