Can I ground my preamp?

I have a Granite Audio grounding system. You can hear some reduction of noise with some settings, but it does not resolve a ground loop problem.

I have yet to find a system that was not improved making the preamp the only grounded unit. Some are very concerned about the possibility that and amp can have the hot wire somehow come in contact with the chassis and a person who is grounded come in contact with that chassis. There is certainly some probability of that happening but it is very remote. Canada doe not allow cheater plugs to be sold, which is over the top in my opinion. Synergistic Research sells the best cheaters that I have ever heard.

Rrog, disconnect the interconnects from your amp and turn it on. If there is still hum, you have a problem in the amp. This is unlikely. If not put the ic between the preamp into the amp, but with nothing plugged into the preamp. If you have hum, it is the preamp. If it is in one channel, that is the problem. This is improbable. Switch the ics at the preamp. If it switches, it is the preamp.

If no hum, connect one source. The one that adds hum is the problem. Put a cheater on its pc. If that doesn't help it, it is in that source.