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6
ORB35 Receiver/Base Unit
(contʼd)
Call Switch Contacts (Rear)
Function buttons on the OMX1 can be activated to cause a relay contact in the ORB35 unit
to cycle for the purpose of signaling a call-in from the room to the facilityʼs intercom
system. Both normally open and normally closed contacts are provided. Connect the appro-
priate contact type to the call-in signaling circuit for the intercom system in use.
Override Input (Rear)
The ORB35 unit provides an override input which is compatible with a wide range of input
devices. 25V and 70V speaker lines can be directly connected to the override input as well
as a line-level signal. These connections are transformer-coupled and are not referenced to
ground. If it is desirable to reference the input to ground, place a jumper wire between COM
and GND terminals.
• Connect a 25 or 70V speaker line to the 25/70V and COM terminals to trigger an override
when the speaker line becomes active.
• Connect a line-level input to the LINE and COM terminals to trigger an override when this
source becomes active.
The Override Input is always connected to the amplifierʼs internal mix bus. When an override
is triggered, the AUX inputs of the ORB35 are muted, allowing the Override Input to take
priority over the audio program from the ORB35 Receiver/Base Unit. The OMX1 inputs are
active during an override page.
Boost Out (Rear)
The Booster output RCA jack provides a line-level output of the program at the speaker
outputs including all volume adjustments and EQ settings. This output is typically used to
feed an external amplifier to increase the power available for the application.
Sub Out (Rear)
This RCA jack provides a line-level low-passed version of the Boost output. This output is pro-
vided for connection of a powered subwoofer, if available.
Input 4 (Front)
The front-mounted Input 4 is wired in parallel with the rear-mounted Input 4. Both inputs
should not be connected to source equipment at the same time. See the section on AUX
inputs for more information about this input.
Monitor Outputs (Front)
Two different styles of monitor output jacks are provided on the front of the receiver/base
unit. These styles are provided to improve the compatibility with devices such as Assistive
Listening Devices or recording equipment. The Monitor outputs provide a line-level signal
with the same program as the speaker outputs including all volume adjustments and EQ
settings (Pre Master Volume).
AC Line Cord (Rear)
Connect the AC line cord to a 120V AC grounded outlet (5-15R or greater).