I would have put the M3 plate under the preamp prior to placing one under the power amp. The best a power amp or any component in a chain can do is feed the info given it by the prior component. Vibration is being introduced at the preamp, the power amp will communicate this. Try moving the M3 to the Preamp. I am willing to bet there will be significant sonic benifits. I certainly found this to be the case.
Interestingly, I tried the S1 under my components as an experiment and found it not to be as effective as the M3. I have used the nimbus and couplers and they are great as well but I found them to be no more effective than nordost pulsar point under the power amp. My guess is that the power amp will be the least sensitive, provided that it's solid state and not tube driven.
Interestingly, I tried the S1 under my components as an experiment and found it not to be as effective as the M3. I have used the nimbus and couplers and they are great as well but I found them to be no more effective than nordost pulsar point under the power amp. My guess is that the power amp will be the least sensitive, provided that it's solid state and not tube driven.