When [MASTER ATT] is set to 0 dB, the MASTER 1 output (XLR) is 2 Vrms when the master level indicator is at 2 dB, and the MASTER 2 output (PIN) is 2 Vrms when the master level indicator is at about +8 dB (not indicated on the scale).
Lowering the [MASTER ATT] control does not change the way the master level indicator lights.