Bosch F.01U.033.716 Datasheet

Communications Systems | PLE‑2MAxx0‑EU Plena Mixer Amplifier

PLE‑2MAxx0‑EU Plena Mixer Amplifier

6 microphone/line inputs plus 3 music source inputs

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100 V, telephone and a call station input with priority

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& VOX

2 zones and announcement only output

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Voice activated emergency override

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High output power 120 and 240 Watts

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2-tone chime built in (7 more chimes optional with

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call station)

Outputs for line out, music only out and insert point

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24 V backup input with built in 24 V charger

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Separate tone controls for microphones and music

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sources

These Plena mixer amplifiers are high performance,
professional public address units with modern state of the
art features. They are easy to use, taking the complexity
away from the user and putting it where it belongs, inside
the equipment. Providing a crisp call or clear music is as
easy as turning on the radio.

The amplifier is also surprisingly affordable, without
sacrificing features such as ducking, priority and
flexibility.

Functions

Microphone and line inputs

All Mic/line inputs can be switched between microphone
level and line level sensitivity. The inputs are balanced but
can be used unbalanced. Phantom power can be switched
on 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 the PTT

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(push to talk). A 2-tone chime can be configured to
precede an announcement.
Input 2 can be switched automatically if a signal is fed

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to the input i.e. if someone speaks into the
microphone (VOX activation).

When one or both inputs are configured to have priority,
the amount of attenuation (reduction) of the cinch inputs,
can be set between ‑2 dB (little attenuation) or -∞ dB
(mute). This provides a talk-over or voice-over function.
Input channels 1 and 2 also feature selectable speech
filters to enhance the clarity of announcements.

Music inputs

Separate music inputs are available with their own input
selector and volume control. The user can choose a music
source like a CD player or radio (like the PLN-DVDT), and
set the level of music.

You can set the desired sound for the music source
separate from the mic/line inputs. So if the music needs
boosted low frequencies, this does not lead to muddy
sounding voices from the microphones. A truly unique
feature in its class.

Personalized settings

More unique features are available such as detachable
labels where the user can write the names for inputs,
music sources and zones. These labels can then be
mounted on the front, protected by the clear window.

Another useful feature is to indicate preferred settings on
the front panel by inserting colored pins at the preset
levels of all knobs. You can then instruct a user to set all
the controls to the silver pins to configure the system for
their particular use. A second user can set all controls to
the red pins for their configuration.

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2 | PLE‑2MAxx0‑EU Plena Mixer Amplifier

Tone controls

The unique tone controls provide separate control for
mic/line inputs and music inputs so that the voice on the
microphones can be specifically optimized for excellent
speech or singing. Correspondingly, the tone controls for
background music provide the most appropriate music
reproduction.

In addition, the tone controls are not standard bass and
treble controls. Our experience has led us to develop a
tone control that can be used as a traditional tone control
with high and low control, but has a powerful contour that
addresses the problems found in real situations.

The tone control for the microphone and line inputs
boosts warmth in voices without boosting rumble and
cuts rumble without loosing warmth in the low
frequencies. In the high frequencies, the tone control
boosts sparkle without adding sharpness, but when
cutting is first, cuts harshness and sharpness without
reducing clarity.

The tone control for the music inputs boosts deep bass
first without making the sound boomy, and cuts rumble
without loosing warmth in the low frequencies. In the high
frequencies the tone control is similar to the microphone
inputs, with slightly different frequencies to suit music
reproduction.

For easy integration with another PA system or a
telephone paging system, a telephone / 100 V emergency
input with VOX activation is provided. It has its own
preset volume control and overrides all other inputs,
including call station and inputs 1 and 2. The unit also has
a line output to add amplifiers for larger systems, with
more output power, this output can be switched to music
only so that for instance music on hold can be provided
for the telephone system. Insert (loop through) input and
output connections enable external sound processing
equipment, such as an equalizer or the Plena feedback
suppressor, to be connected between the preamplifier
and the power amplifier stages.

Power

These Plena mixer amplifiers come in 120 and 240 Watts
output power. This power is directly available on 100 V
constant voltage connections and on a low impedance
connection for an 8 ohm load. Moreover, the amplifiers
have a separate 100 V call-only output channel for
addressing areas where only priority announcements are
required. The call-only output can also be used for 3-wire
remote, volume control override.

Zones

The mixer amplifier has two zone outputs. The music can
be switched on and off in the zones via the front panel
and optional wall panel. Announcements from the
PLE-2CS two-zone call station can be routed to zone 1 or
zone 2, or both. Announcements from the tel/100 V input
or inputs 1 & 2 are routed to both zones. Input 1 can be
used for a PLE-1CS all-call call station or any other
microphone or call station with a PTT contact.

Output status

An LED VU meter monitors the master output. A
headphone socket, below the VU meter, provides the
mixer output before zone selection so that it is possible to
listen to the output before the signal is sent to the zone.
For total reliability and ease of use, a limiter is integrated
into the output stage to restrict output if the user applies
too much signal.

Controls and indicators
Front

On/off switch

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Power on LED

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LED VU meter for master output (LEDs for -18, -12 -6,

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-3, 0 dB)
Master volume knob

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Six volume knobs for microphone inputs

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Knob for treble level

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Knob for bass level

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Headphone socket

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Two zone selector buttons

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Background music button

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Back

Dip switches

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Chime level

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Ducking level

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Tel/100 V volume control

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Interconnections

See Technical Specifications.

Certifications and Approvals

Safety acc. to EN 60065

EMC emission acc. to EN 55103-1

EMC immunity acc. to EN 55103-2