Sennheiser 502875 Instruction Manual page 16

Integrating the transmitter into an existing connection between devices
To integrate the transmitter into an existing connection between your
sound source and an additional device (e.g. an amplifier):
Check if the RCA cable of the additional device is connected to an input
(see the instruction manual of the device).
Connect the RCA cable of the additional device to the RCA output
the transmitter.
The transmitter must remain connected to the mains. Otherwise,
the connection between your sound source and the additional
device will be interrupted.
Putting the RS 180 into operation
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