I connect my G-system 4 cable method.
1. Volume on my amp was at 0 (zero) and still is very loud
2. My rack Eq is picking up all kind of noise.I did test my amp loop according to Laird suggestions and it is dead quiet.
I hooked up mu EQ just before FX return and FX send and insert return.This secong method produced more noise and hum.
I use Mogami cables in and out my EQ.Other cables are Domoniator cables.
I would appreciate your input