Monacor ATT-442ST Manual De Instrucciones página 5

Speaker Attenuator
These instructions are intended for users without any
specific technical knowledge . Please read these in-
structions carefully prior to operation and keep them
for later reference .
1 Overview
1 Button AMP to switch on and off all connected
speakers
2 Volume controls for the individual speaker pairs
3 Buttons for each speaker pair to select amplifier
A or B
4 Screw terminals* for the speakers
5 Screw terminals* for connection to the speaker
outputs of amplifier A
6 Screw terminals* for connection to the speaker
outputs of amplifier B
* For better handling, the screw terminals can be removed
from their plug-in connections .
2 Important Notes
The unit corresponds to all relevant directives of the
EU and is therefore marked with
•
The unit is suitable for indoor use only . Protect it
against dripping water and splash water, high air
humidity and heat (admissible ambient temperature
range 0 – 40 °C) .
•
For cleaning only use a dry, soft cloth; never use
chemicals or water .
•
No guarantee claims for the unit and no liability for
any resulting personal damage or material damage
will be accepted if the unit is used for other pur-
poses than originally intended, if it is not correctly
connected or operated, if it is overloaded, or if it is
not repaired in an expert way .
If the unit is to be put out of operation
definitively, take it to a local recycling plant
for a disposal which is not harmful to the
environment .
3 Applications
The 4-zone stereo attenuator is especially designed
for use in audio systems so that different volumes
can be adjusted for different PA zones . The unit is
inserted between the stereo speaker outputs of the
power amplifier and the stereo speakers (impedance
TO TO TO TO
SPKR 4 SPKR 3 SPKR 2 SPKR 1
R L R L R L R
4 4
4 – 16 Ω) . It is possible to connect two stereo amplifiers
(max . 100 W per channel) . The stereo signal of one
of the two amplifiers can separately be selected for
each speaker pair .
4 Electrical Connection
If the amplifiers to be connected are switched on,
switch them off first!
1) For better handling, the connection terminals
2) Always connect the positive poles of the amplifier
3) The complete connection is shown on page 3 .
4) Connect the speakers to the terminals TO SPKR 1
.
5 Operation
1) When setting the unit into operation for the first
2) Engage the button AMP (1) . Thus, all speakers are
3) Use the appropriate buttons A / B (3) to define for
4) Use the appropriate volume controls (2) to adjust
5) To switch off all speakers, disengage the button
6 Specifications
See page 10 .
Subject to technical modification .
FROM FROM
AMP A AMP B
L R L R L
5 6
(4 to 6) can be removed from their plug-in connec-
tions . When replugging them, make sure that they
are plugged onto the correct pins!
outputs and speakers to the corresponding clamp-
ing contact "+" and the negative poles to "−" .
Connect the speaker outputs of the amplifier to the
terminals FROM AMP A (5) . If a second amplifier is
used, connect it to the terminals FROM AMP B (6) .
to TO SPKR 4 (4) . It is also possible to use speakers
of different impedances (4 Ω to 16 Ω) .
time, turn all volume controls (2) to the left stop to
zero before switching on the connected amplifiers .
switched on .
each speaker pair the amplifier whose signals are
to be reproduced .
the volume desired for each speaker pair .
AMP (1) .
5