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6
7 GND terminals
This is the grounding screw terminal. If hum or noise occurs, ground (earth) the unit via this jack, or try connecting it
to the chassis of the mixer or preamp, etc.
8 Speaker outputs
These 5-way binding posts are used to connector speakers.
The following illustrations show how speakers should be connected for normal and Bridge mode operation.
Normal mode Bridge mode
Speaker
min. 8Ω
+
–
Speaker
min. 4Ω
Speaker
min. 4Ω
+
–
+
–
In Bridge mode, you can connect multiple high-
impedance speakers (that are compatible with 70V
line output) in parallel. The number of speakers you
can connect is determined by the rated input of each
speaker. For each channel, you can connect speakers
as long as the speakers’ total rated input does not
exceed 150W (for XM6150) or 350W (for XM4220).
Total rated input 150W or less (XM6150)
350W or less (XM4220)
+
–
+
–
+
–
Note: Be sure to use speakers that support the 70V
line-out voltage.