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The inputs of the AMIS ZRM4 can accommodate a wide range
of sources including dynamic microphones, DVD and CD players.
The zone outputs may be used to drive power (booster) amplifiers,
mixers or mixer amplifiers. Each installation will require setting the
appropriate relative mix of levels between microphones, program
sources and tones for each zone and balancing between the zones.
Because of the variation in levels between the possible sources,
AMIS ZRM4 offers a number of gain stage adjustments so you can set
the correct levels for your application.
Also consider what the outputs are driving....
Setting up correct gain structure through the whole system is
important to achieve optimal results.
The following step by step procedure has been devised to assist during
the setup process. When the AMIS ZRM4 was shipped to you from the
factory, it was set up in a particular way. In the following procedure it
is essential that you are starting from these initial settings.
+ Program Input Gain Controls – half (12 o'clock)
+ XLR Mic/Line switch
+ Input Level Controls
+ Output Level Controls
CONNECT THE SOURCES
First connect all the required sources to the appropriate input
connectors. If the source is a microphone, set the MIC/LINE switches
to the "MIC" position. If the source is an electret or condenser
microphone, set the phantom switch to the "PHANTOM ON" position.
If the source is a microphone used for speech such as for paging,
set the high pass filter switch to the "HPF ON" position. If one of
the sources needs to have priority over the some other sources
(paging or jukebox), ensure that it is connected to input channel
#1 as this is the designated priority input.
NOTE: The high pass filter has a knee around 160Hz
and a roll-off of 6dB/octave. Using the HPF helps to
eliminate thumps and rumble often heard through
paging mics.
CONNECT THE OUTPUTS
Turn the amplifiers off. Connect the AMIS ZRM4's outputs to the
amplifiers' line level input. Check that the AMIS ZMR4 is on, then turn
on the amplifiers. If the amplifiers have a level controls, set them to
maximum.
AMIS ZRM4 INSTALLATION & OPERATION MANUAL
BASIC SETUP AND OPERATION
– MIC
– off
– off
TEST THE INPUT LEVELS
For each source, try to achieve the highest signal level possible.
i.e. for a CD player, cassette deck or other music source, put on the
loudest anticipated program music or for a paging mic make a loud
page. During this signal condition, the input status LED should light
green and may occasionally turn red for a short period.
If the status LED stays red (more than 5% of the time), you should
reduce the input gain trim. If the status LED never turns red at all,
you may wish to increase the input gain trim if required.
ASSIGN THE SOURCES TO THE OUTPUTS
For each input, activate the appropriate output assignment switches to
the outputs you wish the signal to be routed. Yellow LED's will indicate
which input is routed to which output
SET UP THE PRIORITY FUNCTION
If a priority signal such as a paging mic or line source is required,
switch the priority override enable switch to the on position (in) for
that zone. (See page 8 for further information)
SET THE LEVELS
Turn the input levels up to 5. For each output, turn up the level until it is
at an appropriate level for the listening environment. You will now have
to adjust the relative levels of the inputs to achieve a good balance for
each zone. It is generally a good idea to set up the priority signal (if
any) first. The aim of these adjustments is to have all level controls
at between 3 and 7. This may not be possible however. A good rule of
thumb is that input level controls should be higher than the output
level controls.
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