thomann The Box Pro A 218 LA, User Manual, Page: 15 / 36

1 INPUT
Audio signal input with lockable XLR chassis socket. The socket is electronically perfectly symmetrical wired to ach‐
ieve an optimal signal-to-noise ratio and a sufficient power reserve, including A / D conversion.
2 [GND LIFT] pushbutton
If hum is caused by a ground loop, you can use this switch to disconnect the connection between the earth pin of the
device and the signal ground of the device. Switching only has an effect when using balanced connection cables.
3 LINK
Audio signal output with XLR chassis plug to connect other line array elements or speakers to which the input signal
is passed.
4 [TERMINATE] pushbutton
If the devices is networked together with Line Array elements, the last unit must be terminated with the built-in load
resistance. Press the pushbutton [TERMINATE] . The LED above it lights up.
5 MAINS IN
Blue lockable powerCON input socket (NAC3FA). To turn the unit on, plug the powerCON power cord or the
powerCON connector cable from another device into this socket and turn the plug clockwise to the position ON. To
turn the unit off, pull the locking lever on the plug backwards and turn the plug counter-clockwise to the position
PUSH OFF.
Connections and operating elements
A 218 LA
15