If maximum elimination of ‘ground loop’ buzz is the goal, an input type isolator located at the receive end of an interface cable is always the preferred solution. However, if the signal destination is unknown or may change with setup, an ISO-MAX isolator with an “O” in the model number (PO-2XR, for example) may be useful at the mixer’s balanced output. The isolator output can then drive either balanced or unbalanced equipment inputs with no risk of damage or misbehavior in the mixer, regardless of what kind of output stage it may use. There is generally a reduction in ‘ground loop’ hum but little effect on buzz.
Posted in: Iso-Max