ABSTRACT
There are only two electrical output terminals for an unbalanced output-signal and ground. However, the unbalanced output stage in Figure 17.1a is fitted with a three-pin XLR connector, to emphasise that it is always possible to connect the cold wire in a balanced cable to the ground at the output end and still get all the benefits of common-mode rejection if you have a balanced input. If a two-terminal connector is fitted, the link between the cold wire and ground has to be made inside the connector, as shown in Figure 16.2 in the chapter on line inputs.
