AUDAC AMP20, User Manual

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2) Connecting audio outputs
This suggested application uses a total of four loudspeakers. The AMP20 contains
two speaker outputs (stereo) meaning that two speakers should be connected on
every amplified output. The speakers must be connected in parallel and the load on
each amplifier output channel should be 4 Ohm or higher.
3) Connecting the external units
The external (optional) wall volume controllers and remote wall mixers should be
connected to the corresponding RJ45 connector ports. The connections should
be made by using simple CAT5 twisted pair (or better) cabling in a straight pinout
configuration. The maximum cable length between the external units and the AMP20
may not exceed a total cable length of 100 meters.
4) Connecting the power supply
The included power supply should be connected to the 2-pins Euro Terminal block
connector. Watch the polarity when connecting the power supply.
Configuring the AMP20
1) Adjusting the input sensitivity & volume
The configuration of the AMP20 only includes the sensitivity adjustment of the inputs
and the overall volume regulation. The sensitivity of the inputs can be regulated by the
two potentiometers on the front panel of the AMP20. The correct regulation depends
on the signal level of the connected sources and the requirements for each specific
application. The regulation should be done experimentally, making a good balance
between the music signal from the audio source and the speech from the microphone.
The line and microphone level signal coming from the remote wall mixer is mixed
locally and the balance can be set using both push-lock potentiometers. The output
level can be set using the big volume dial. This signal is mixed with the direct line and
microphone inputs at equal levels.
After all sensitivity settings have been made, the overall volume control can be done
using the VC3008/4008 volume controller.
Ready
Your system is now ready for use.