Operation; Specifications - Monacor ATT-442ST Bedienungsanleitung

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 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
4 – 16 Ω) . It is possible to connect two stereo amplifiers
TO TO TO TO
SPKR 4 SPKR 3 SPKR 2 SPKR 1
R L R L R L R L
4 4
(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
(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!
2) Always connect the positive poles of the amplifier
outputs and speakers to the corresponding clamp-
ing contact "+" and the negative poles to "−" .
3) The complete connection is shown on page 3 .
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) .
4) Connect the speakers to the terminals TO SPKR 1
to TO SPKR 4 (4) . It is also possible to use speakers
of different impedances (4 Ω to 16 Ω) .

5 Operation

1) When setting the unit into operation for the first
time, turn all volume controls (2) to the left stop to
zero before switching on the connected amplifiers .
2) Engage the button AMP (1) . Thus, all speakers are
switched on .
3) Use the appropriate buttons A / B (3) to define for
each speaker pair the amplifier whose signals are
to be reproduced .
4) Use the appropriate volume controls (2) to adjust
the volume desired for each speaker pair .
5) To switch off all speakers, disengage the button
AMP (1) .

6 Specifications

See page 10 .
Subject to technical modification .
FROM FROM
AMP A AMP B
R L R L
5 6
5