Legrand NV-D2120 - Manual (Page 13)

IV. Trigger In
This input (Fig. 8) is designed for a mono 1/8” plug to accept a trigger voltage coming in from an external source.
Any voltage ranging from 3 to 30 volts, AC or DC, will cause the amplifier to turn on when the Power switch is in the Trigger mode.
Fig. 8
V. Unit On
This output (Fig. 9) provides a constant 12 volts DC when the amplifier is powered on. This is useful for powering on external equipment with the
D2120.
Fig. 9
VI. Speaker Impedance
This switch (Fig. 10) allows for the adjusting of the impedance of the amplifier. By default the amplifier will be set at 8 ohms. This is fine is you are
powering a pair of 8 ohm speakers, or a single stereo speaker rated at 8 ohms. In installations where three or more 8 ohm speakers will be used, or
a pair of 4 ohm speakers are being utilized, the impedance of the amplifier should be set to 4 ohms. The power of the output will remain at 120
watts per channel.
Fig. 10
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