Bosch PLE-1MA030-US, PLE-1MA060-US, PLE-1MA120-US Specsheet

Communications Systems | PLE‑1MAxx0‑US Plena Mixer Amplifier

PLE‑1MAxx0‑US Plena Mixer Amplifier

4 microphone/line inputs, plus 3 music source inputs

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70 V and telephone input with priority & VOX

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Announcement only output, 3-wire volume override

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Voice-activated emergency override

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Wide range of power options (30, 60 and 120 Watts)

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2-tone chime

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Outputs for line out and music only out

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Unique easy-to-use intuitive tone controls

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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 of the RCA input, 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.

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‑1MAxx0‑US Plena Mixer Amplifier

Integration

A telephone / 70 V emergency input with VOX activation is
provided for easy integration with another PA system or a
telephone paging system. 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, for example, so that music on hold
can be provided for the telephone system.

Power

The mixer amplifiers come in 30, 60 and 120 Watt output
power options. This power is directly available on 25/70 V
constant voltage connections and on a low impedance
connection for a 4 ohm load. Moreover, the amplifiers have
a separate 70 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 displays the master output level. A
headphone jack socket, below the VU meter, provides the
mixer output signal. 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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Four 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 jack

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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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Ducking level

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Tel/70 V volume control

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Interconnections

See Technical Specifications.

Certifications and Approvals

EMC emission acc. to EN 55103-1

EMC immunity acc. to EN 55103-2

Installation/Configuration Notes

Rear view

Parts Included

Quantity Components

1 PLE-1MAxx0-US Plena Mixer Amplifier

1 Power cord

1 Manual

1 Set of 19”mounting brackets

Technical Specifications

Electrical

Mains power supply

Voltage 115 VAC ±10%, 50/60 Hz

Inrush current PLE-1MA030-US 4.5 A

Inrush current PLE-1MA060-US 5 A

Inrush current PLE-1MA120-US 10 A

Power consumption

PLE-1MA030-US 100 VA

PLE-1MA060-US 200 VA

PLE-1MA120-US 400 VA

Performance

Frequency response 50 Hz to 20 kHz (+1/‑3 dB @ ‑10 dB

ref. rated output)

Distortion <1% @ rated output power, 1 kHz

Bass Control Max -12/+12 dB (frequency is setting

dependent)

Treble Control Max -12/+12 dB (frequency is setting

dependent)

RJ-45 input 1 x

Wall panel input For PLE-WP3S2Z