PLE‑2MAxx0‑EU Plena Mixer Amplifier Communications Systems

PLE‑2MAxx0‑EU Plena Mixer Amplifier Communications Systems
Communications Systems | PLE‑2MAxx0‑EU Plena Mixer Amplifier
PLE‑2MAxx0‑EU Plena Mixer Amplifier
▶ 6 microphone/line inputs plus 3 music source inputs
▶ 100 V, telephone and a call station input with priority
▶ 2 zones and announcement only output
▶ Voice activated emergency override
▶ High output power 120 and 240 Watts
▶ 2-tone chime built in (7 more chimes optional with
call station)
▶ Outputs for line out, music only out and insert point
▶ 24 V backup input with built in 24 V charger
▶ Separate tone controls for microphones and music
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.
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.
The amplifier is also surprisingly affordable, without
sacrificing features such as ducking, priority and
Music inputs
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.
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
(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
to the input i.e. if someone speaks into the
microphone (VOX activation).
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.
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.
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
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.
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
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.
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.
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
On/off switch
Power on LED
LED VU meter for master output (LEDs for -18, -12 -6,
-3, 0 dB)
Master volume knob
Six volume knobs for microphone inputs
Knob for treble level
Knob for bass level
Headphone socket
Two zone selector buttons
Background music button
Dip switches
Chime level
Ducking level
Tel/100 V volume control
See Technical Specifications.
Certifications and Approvals
acc. to EN 60065
EMC emission
acc. to EN 55103-1
EMC immunity
acc. to EN 55103-2
PLE‑2MAxx0‑EU Plena Mixer Amplifier | 3
Installation/Configuration Notes
Rear view
Frequency response
50 Hz to 20 kHz (+1/‑3 dB @
‑10 dB ref. rated output)
<1% @ rated output power,
1 kHz
Low Control
Max -12/+12 dB (frequency is
setting dependent)
Hi Control
Max -12/+12 dB (frequency is
setting dependent)
RJ-45 input
Call station input
Wall panel input
Mic/line input
Parts Included
Input 1 (Push-to-talk contact with duck- 5-pin Euro style, balanced,
ing functionality)
3-pin XLR, balanced, phantom
PLE-2MA120-EU / PLE-2MA240-EU Plena Mixer Amplifier
Input 2-6 (VOX with ducking functionali- 3-pin XLR, balanced, phantom
ty on input 2)
Power cord
1 mV (mic); 1 V (line)
>1 kohm (mic); >5 kohm (line)
Set of 19”mounting brackets
S/N (flat at max volume)
63 dB
Plena Easy Line CD
S/N (flat at min volume/muted)
>5 dB
Dynamic range
93 dB
S/N (flat at max volume)
>63 dB (mic); >70 dB (line)
S/N (flat at min volume/muted)
>75 dB
CMRR (mic)
>40 dB (50 Hz to 20 kHz)
Mains power supply
>17 dB
Speech filter
-3 dB @ 315 Hz, high-pass,
6 dB/oct
Phantom power supply
16 V via 1.2 kohm (mic)
Speech filter
-3 dB @ 315 Hz, high-pass,
6 dB/oct
VOX (input 1 & 2)
attack time 150 ms; release
time 2 s
Technical Specifications
115 - 230 VAC ±10%,
50/60 Hz
Inrush Current PLE-2MA120-EU
8/16 A (230/115 VAC)
Inrush Current PLE-2MA240-EU
9/19 A (230/115 VAC)
Battery power supply
24 VDC, +10% / -15%
Current PLE-2MA120-EU
Music inputs
Current PLE-2MA240-EU
12 A
Charge current
0.5 ADC
Cinch, stereo converted to
Charge float voltage
27.3 VDC
300 mV
22 kohm
S/N (flat at max volume)
>70 dB
Power consumption
PLE-2MA120-EU (mains)
400 VA
S/N (flat at min volume/muted)
>75 dB
PLE-2MA240-EU (mains)
800 VA
>25 dB
Emergency / telephone
7-pin, Euro style pluggable
screw terminal
Sensitivity tel
1 V maximum
Sensitivity 100V
100 V maximum
>10 kohm
4 | PLE‑2MAxx0‑EU Plena Mixer Amplifier
Ordering Information
Emergency / telephone
S/N (flat at max volume)
>65 dB
threshold 50 mV; attack time
150 ms; release time 2 s
Nominal level
>10 kohm
Master/music output
3-pin XLR, balanced
Nominal level
<100 ohm
PLE‑2MA120‑EU Plena Mixer Amplifier
120 W, 10 input mixer amplifier
PLE‑2MA240‑EU Plena Mixer Amplifier
240 W, 10 input mixer amplifier
Loudspeaker outputs 100 V*
Screw, floating
Max / rated PLE-2MA120-EU
180 W / 120 W
Max / rated PLE-2MA240-EU
360 W / 240 W
Loudspeaker output 8 ohm*
Euro style pluggable screw terminal, floating
31 V (120 W)
44 V (240 W)
* Subtract 1 dB for 24 V battery operation.
Dimensions (H x W x D)
100 x 430 x 270 mm
(19" wide, 2U high)
Stand-alone, 19" rack
Weight (PLE-2MA120-EU)
Approx. 10.5 kg
Weight (PLE-2MA240-EU)
Approx. 12.5 kg
Operating temperature
-10 ºC to +45 ºC
Storage temperature
-40 ºC to +70 ºC
Relative humidity
Acoustic noise level of fan
<33 dB SPL @ 1 m
temperature controlled
Bosch Communications Systems
12000 Portland Avenue South
Burnsville, Minnesota 55337, USA
Phone: +1-800-392-3497
Fax: +1-800-955-6831
Europe, Middle East, Africa:
Bosch Security Systems B.V.
P.O. Box 80002
5600 JB Eindhoven, The Netherlands
Phone: + 31 40 2577 284
Fax: +31 40 2577 330
© Bosch Security Systems Inc. 011 | Data subject to change without notice
T4405227147 | Cur: en-US, V19, 27 Jan 2011
Robert Bosch (SEA) Pte Ltd
11 Bishan Street 21
Singapore 573943
Phone: +65 6571 2600
Fax: +65 6571 2698
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