Bosch Appliances Music Mixer PLE-1MA030-EU User Manual

Page of 30
Bosch Security Systems | 2007-11 | PLE-1MA030-EU,  PLE-1MA060-EU, PLE-1MA120-EU en
Plena Mixer Amplifier | Installation and User Instructions | Description
 en | 7
2
Description
2.1 
The Plena product range
The Plena Mixer Amplifier is part of the Plena product 
range. Plena provides public address solutions for places 
where people gather to work, worship, trade, or relax. It 
is a family of system elements that are combined to 
create public address systems tailored for virtually any 
application
The Plena product range includes:
mixers
preamplifiers
power amplifiers
a music source unit
a digital message manager
a feedback suppressor
call stations
an All-in-One system
a voice alarm system
a  timer
a charger
a loop amplifier
The various elements are designed to complement each 
other thanks to matched acoustical, electrical and 
mechanical specifications.
2.2 
Contents of box
The packaging box contains the following contents:
Labels and colored pins for indicating favorite 
settings
Power  cord
Plena Bonus CD
Mounting brackets (LBC 1901/00)
2.3 
The Plena Mixer Amplifier
The Plena Mixer Amplifier is a high performance,
professional public address unit for mixing up to four 
separate microphone/line signals, and any one of three 
separate music signals. For a schematic overview of the 
Plena Mixer Amplifier, see figure 2.1 on the next page.
The volume of each microphone/line signal can be 
individually adjusted to obtain the required mix; the 
mixed output is controlled via the master volume 
control and separate high/low tone controls.
The unit is easy to use, and provides a crisp call or clear 
music. The amplifier also has enhanced features such as 
ducking level control, priority, labelling, and setting 
indicators.
All Microphone/line inputs can be switched between 
microphone level and line level sensitivity. The inputs 
are balanced but can also be used unbalanced. Phantom 
power can be selected via a DIP switch to provide 
power to condenser microphones. Input channels 1 
and 2 can take priority over all other microphone and 
music inputs:
Input 1 can be activated by contact closure on a PTT 
(push to talk). A chime can be configured to precede 
an announcement.
Input 2 can be switched automatically if a signal is 
available at the input, for example, if someone 
speaks into the microphone (VOX activation).
A telephone/100 V emergency input with VOX 
activation is also provided for easy integration with 
another PA system or a telephone paging system. It has 
its own volume control and overrides all other inputs, 
including the call station and inputs 1 and 2.
The unit also has a line output to add amplifiers for 
larger systems that require more output power. This 
output can be switched to music only, for example, so 
that music on hold can be provided for the telephone 
system.
Users can create custom labels for inputs and music 
sources. These labels can be attached to the special 
holders at the front of the mixer amplifier. Colored pins 
can also be inserted at various positions around the 
volume and tone dial controls to indicate favorite 
settings for a particular application.