ORB35 Receiver/Base Unit Installation & Operation
Mounting and Ventilation
Rack Mount
Rack mount brackets (RPK92) are available as an accessory. The feet on the ORB35 Receiver/Base unit must be removed before
rack mounting the unit. The receiver/base unit is passively cooled and requires proper ventilation. One empty rack space above
and below the receiver/base unit (Model ORB35) should be provided to ensure proper ventilation. The receiver/base unit should
not be positioned immediately above other equipment that produces significant heat.
Shelf Mount
The receiver/base unit has attached feet that make it suitable for resting on a level surface. The feet provide the necessary venti-
lation space below the unit. A minimum of 1” of space above the amplifier is also required. If stacking the ORB35 unit with other
equipment, be sure that the necessary space is left above the unit and that the equipment directly below the receiver/base unit does
not produce significant heat.
System Wiring Connections
IMPORTANT: Turn the ORB35 Receiver/Base Unit OFF before making any electrical connections.
Speakers (Rear)
A pluggable screw terminal connector provides access to the speaker output connections. Connect the appropriate type of speaker
load to the specific output type.
IMPORTANT:
Do not connect to more than one speaker output type.
70V and 25V Outputs
70V and 25V outputs typically require speakers with transformers to step down the speaker
drive voltage. The total load in watts of all the speakers connected to the 70V or 25V
output cannot exceed the unitʼs output power rating. Make connections to the COM terminal
and either the 70V or 25V terminals as determined by the speaker specification or appli-
cation. All speaker outputs are transformer-coupled and have no reference to earth ground.
If it is desired to have the speaker system ground referenced, then a jumper wire can be
connected between COM and GND terminals.
8-Ohm Output
When connecting to the 8-ohm output, the combined load of all the speaker impedances
cannot be less than 8 ohms. Connecting a load higher than 8 ohms will not harm the unit,
but full rated output power will not be delivered to the speaker load if its impedance is higher
than 8 ohms. Make connections to the 8-ohm and COM terminals. All speaker outputs are
transformer-coupled and have no reference to earth ground. If it is desired to have the
speaker system ground referenced, then a jumper wire can be connected between COM
and GND terminals.
AUX Inputs (Rear)
The ORB35 unit provides 4 line-level AUX inputs for connections to various audio source devices.
All inputs are stereo combining RCA jack inputs that convert stereo inputs to mono. Mono sources can
be connected to either of the RCA jacks for the input with the other jack left unconnected.
IR Sensors (Rear)
The coaxial cable from the IR sensor must be connected to either IR Sensor 1 or 2. The second
input is provided for situations where one sensor cannot provide adequate coverage for the
application, and an additional sensor might need to be connected.
5
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PLEASE READ THIS BEFORE INSTALLATION:
Before the MIC/Transmitter OMX1 will work in the Orator system, it
must first be programmed by inserting it into a charging dock. In systems with 2 OMX1 units, each must be inserted
into a different dock. Inserting both OMX1 units into the same dock will result in both MIC/Transmitters operating on
the same channel frequency, which should be avoided. See page 7 for more information on programming the OMX1
MIC/Transmitters.
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