X
X
X
T
T
T
E
E
E
E
E
E
L
L
L
E
E
E
C
C
C
T
T
T
R
R
R
O
O
O
N
N
N
I
I
I
C
C
C
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User’s Manual
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10
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11
13. System SetUp (Step by Step)
The inputs of the mixer can accommodate a wide
range of sources including active paging stations,
dynamic microphones, DVD,CD and Mp3 players
and mixers.
The Preout outputs may be used to drive power
amplifiers, mixers, or mixer amplifiers.
The Power output may be used to drive constant
voltage or constant impedance speaker lines.
Each installation will require setting the
appropriate relative mix of levels between paging,
program sources and mic/line inputs for each line
or amplified outputs.
Because of the variation in levels between the
possible sources, the mixer offers a number of
gain stage adjustments and parameter tools so
you can set the correct levels for your application.
Setting up correct parameter 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.
Connect the speaker lines to the correct
power output socket.
Active the phantom supply by the dipswitch
(27) located on the back panel if electrect
microphones are used.
Ensure that all the Gains and Volume controls
are at minimum, and that the Tone controls
are flat.
Keep the master volume for each output
channel at about 10%÷20%
Keep the input channels LEVEL (5) at about 5
(50%).
Adjust each input channel GAIN (2) in order
that the Level Meter (6) green led lit
continuously also with low input signal and
that the +3dB red led lit with strong input
signal.
Adjust GATE (11) in order to avoid the noise
gate activation cause background noise or
undesired signal but by the speaker voice or
input signal only.
Adjust the master volume and the input
channels LEVEL in order to obtain the
required sound pressure.
Adjust the 3 band equalizer (1,3,4) for each
channel in order to obtain the best result with
each different input source.
Set Output Level (16) at 0dB.
Set Shift Frequency (18) at 2 Hz with the
button in + position (17) and exclude
processor by pushing BY-PASS button (14).
Adjust Output Level (16) until singing limit of
LARSEN EFFECT.
Insert processor with BY-PASS button (14).
Increase system volume and adjust frequency
(18) to obtain the possible maximum volume.
Frequency value changes from case to case,
so it is necessary to find the one giving best
results in the examined environment.
Alternatively passing from by-pass condition
to process on condition (14) in order to feel
the processor effectiveness.
