14
REAR PANEL FEATURES
1. POWER CONNECTOR
– Connect the supplied 3-prong
power cord to this connector.
1a. NOTE:
Before plugging in to a power receptacle, make
sure that voltage of your PA-PRO 900 is the same voltage
input setting is factory set.
2. FUSE HOUSING
– Houses the fuse. To remove the fuse,
unscrew the fuse cap counter-clockwise. In the case of a
blown fuse, replace once only. If the fuse blows a second
time, do not attempt to replace fuse again. If a fuse blows
repeatedly, there may be damage an internal component.
Further attempts to power on the unit can cause more
damage. In this case, refer to an authorized service center
for troubleshooting
2a. NOTE:
Only replace with the same type and rating of
fuse as marked.
3. WIRELESS MODULE EXPANSION PORTS
– Install
optional UHF wireless modules in these ports. For details
on operating UHF wireless channels, please refer to the
optional accessories section. (page 23)
To install an optional module:
1. Unscrew the two retaining screws.
2. Remove cover plate and store it in a safe place.
3. Fully insert UHF wireless module.
4. Replace and tighten screws.
4. WIRELESS ANTENNA CONNECTORS
– When the
optional wireless modules are installed, connect the
antennas here for UHF wireless reception.
5. SPEAKER CONNECTORS
– These jacks provide speaker-
level output power from the internal power amplifi er to
connected passive speakers. There are two types of
connector available: speakon and ¼” TS.
Speakon outputs are wired PIN 1+positive (hot), and PIN
2-negative (cold).
¼” TS outputs are wires TIP +positive, and SLEEVE
–negative.
The speaker-level output can be confi gured one of two ways
via the POWER AMP ASSIGN switch on the front panel:
MAIN L/R
– This confi guration is for standard MAIN
stereo L/R output. The left speaker output is the MAIN L
signal, and the right speaker output is the MAIN R signal.
Use this confi guration to power two passive main speakers
for straight stereo output.
MAIN L/R+MONITOR – This confi guration outputs the
MAIN L/R channels as a mono signal to the LEFT (MAIN)
jacks, and the MONITOR channel as a mono signal to the
RIGHT (MON) jacks. Use this confi guration to power a
passive PA/MAIN speaker on the left side and a passive
stage monitor on the right side.
NOTE:
If you are going to use one speaker per channel,
ensure the speakers’ impedance is no lower than 4 ohms. If
you are going to connect two speakers per channel, ensure
the speakers’ impedance in no lower than 8 ohms. These
two types of connectors are wired in parallel, therefore they
are able to be used together.

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Rear Panel Features