On my powercell , I found that the best place to put a chip is on the Synergistic Gallo mini coupler. Big improvement all around, for now I am using a cable chip there, but perhaps a smaller one would suffice. I also have a cable chip on the Powercell 32A plug at the powercell.
I also have the large and small Cap chips on all of my Amps caps. In addition to these, I have the Transformer chips on all of my Transformers, 5 of the cable chips and the speaker chips on my speakers.
On the speakers, placing the chip higher up the speaker provides more air, and placed lower more bass. I seemed to find the best overall placement by putting them over the crossover. This placement surprised me, because the crossover is to the right of the speaker binding posts.
The others, Transformers and Cap chips, increased dynamics still further, and has a postive effect, a no brainer.
At this time, I am still playing around with the cable chips. I have a set at the end of my speaker cables but the others still haven't found a "best place"