You can do an 8 gang outlet, power bars can have 12. All share the same ground connection. You have only illustrated ground hum in your thread, not differential ground induced noise pumping.
The definition of a ground loop is having two point identified as ground that are not at the same potential that are used for signal references. I did not say that multiple outlets is the only cause of ground loops but it if a textbook example of how to create one. Most equipment signal grounds are isolated enough from power grounds that a differential is usually "shorted" via the interconnect.
The definition of a ground loop is having two point identified as ground that are not at the same potential that are used for signal references. I did not say that multiple outlets is the only cause of ground loops but it if a textbook example of how to create one. Most equipment signal grounds are isolated enough from power grounds that a differential is usually "shorted" via the interconnect.