RING
TEL
TEL
BAL
MIC GND RING
CONTACT
+
BAL
TR
TEL MIC COM
CONTROLS
MUSIC IN BRIDGING
ALC
TEL VOLUME
MIC VOLUME
MUSIC VOLUME
MUSIC MUTE
RINGER VOLUME
+
_
+
_
70V 25V COM GND
Output Wiring All output wiring connections are made to the terminal strip located under the right
side access panel.Loosen the 2 Phillips-head screws on each side of the cover and
remove the cover.
IMPORTANT: Before making any connections or wiring changes to the amplifier
or any equipment connected to the amplifier,make sure that the amplifier is NOT
plugged into an AC outlet.
NOTE: The amplifier does not have a power switch,so it must be unplugged in
order to turn the power off.
Speaker Connection 70-volt speaker connections are made between the 70V and COM terminals on the
output terminal strip (see Figure 7).Use a 22 AWG shielded,twisted pair cable (Com
Code: 401882956, Pec Code:2734-SPK). Connect the shield of the cable to the
GND terminal of the output terminal strip.The COM and GND terminals of the
output terminal strip are connected using a shorting clip.The shorting clip enables
the amplifier output to act as an unbalanced output (one side of the output
connected to ground). If desired, the output can be made to be a balanced output
with no connection to ground.To balance the output, simply remove the shorting
clip.All speaker connections remain the same as above including connecting the
shield to the GND terminal.
NOTE: The amplifier output terminal strip also includes terminals for 25V and 70V
speaker connections. These are provided for special applications and are generally
not used.
Page 9 of 12
Figure 7: Speaker Connection, Output Wiring
Output Terminal Strip