Perhaps the most important consideration is not to create a grounding loop. In that regard every piece of equipment should be connected to a central point.
Sometimes it can be excessive hard when using RCA as the shield serves two purposes: the second side of the signal and a grounding path. With balanced or XLR one end of the shield can be disconnected if absolutely necessary when a groundling loop is created.
Sometimes it can be excessive hard when using RCA as the shield serves two purposes: the second side of the signal and a grounding path. With balanced or XLR one end of the shield can be disconnected if absolutely necessary when a groundling loop is created.