7
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Connect Audio Source
Determine the length of the audio cable needed to connect to the sound system to the WIR TX90 transmitter.
Install the supplied Phoenix connector on the end of the audio cable to be connected to the transmitter. See
the back of the WIR TX90 for wiring instructions.
The WIR TX90 will accept line level, balanced or unbalanced audio inputs. If you wish to operate in single
channel mode, plug the audio cable with the installed Phoenix connector in “Channel A” OR the “Channel B”
connector. If you choose to operate in two channel mode, plug the audio cables with Phoenix connectors in
both “Channel A” AND “Channel B” connector. NOTE: By default, the WIR TX90 is set to operate in two-
channel mode. To turn Channel A or Channel B on/off, refer to the instructions Selecting a Channel, below.
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Selecting a Carrier Frequency Pair
The WIR TX90 offers two sets of carrier frequencies for Channel A and Channel B:
2.3 and 2.8MHz or 3.3 and 3.8MHz.
The WIR TX90 is preset to 2.3 and 2.8 MHz, which are the most commonly used. Move the slide switch to
select a pair of operating frequencies.
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Selecting a Channel
To activate a channel, press the “CHANNEL” button until the channel “ON” indicator lights. For example,
to operate only channel A, press the “CHANNEL” button until only the channel A “ON” indicator lights. To
operate both channel A and B, press the “CHANNEL” button until both “ON” indicators light.
Note: If you’re only using one channel, make sure the other channel is turned off to maximize
system coverage.
Figure 9: Audio Source Connections
Power on Indicator
Figure 10
