The XLR-3 inputs and outputs are
electronically balanced and can be wired unbalanced. Each output is
individually buffered so that a short circuit on one output won’t
affect the others.The left and right input gain controls (normalising)
are pre-set potentiometers accessible through the front panel. The
output gain may be varied from -8dB to 18dB which is useful for
normalising consumer and professional signals to give outputs of -15dBu
and 0dBu respectively.