Bosch PLM-4P125-US, PLM-4P220-US Specsheet

Communications Systems | PLM-4Px2x PLENA matrix DSP Amplifiers

PLM-4Px2x PLENA matrix DSP Amplifiers

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u 4‑channel, Class D power amplifier

u 100V/70V/8Ω/4Ω outputs

u Complete loudspeaker processing DSP with input

mixing; controlled by PC GUI and iOS app

The PLM‑4Px2x PLENA matrix Amplifiers are built to
perform. Designed to be reliable, cost effective, multi
channel amplifiers; they are suitable for almost any
application that demands high quality audio and
flexible control.
The built‑in DSP processor is packed with powerful
features. The loudspeaker library will allow the easy
tuning of Bosch/EV/Dynacord loudspeaker products.
The power saving mode on the amplifier allows the
amplifier to save over 80% of its running costs when
areas are not being used. Equipped with “Amp Link”,
combining both the PLM‑4Px2x amplifiers with the
PLM‑8M8 8 Channel DSP Matrix Mixer couldn’t be
easier.
Some typical application include: Shopping centers,
schools, restaurants, bars, nightclubs, cafes, gyms,
recreational facilities, churches, warehouses, office
buildings, regional airports, train stations, bus
terminals, boardrooms, meeting rooms, conference
facilities, small theme parks, museums, back of house
performing arts centers and sports stadia.

Functions

Controls and indicators

The indicators on the front panel are; Signal/Clip, fault
per channel and mains power. There are no controls
on the front of the unit; this is to reduce the
assistance from “overly helpful” venue staff. However,

u Amp Link to connect easily with PLM-8M8

u Environmentally friendly auto standby mode

on the rear of the unit there is attenuation for the 4
output channels, dip switches for changing the input
sensitivity, bridging the amplifier channels; and the
mains power switch. All other controls and indicators
are available via the PC GUI software.

DSP features

The DSP features are accessed via the PC GUI
software.

• Input Mixer: Each of the 4 amplifier channels has an
separate input mixer. Via the PC GUI it is possible to
mix any of the 4 line inputs and have level control
over the override input and noise generator.
Effectively creating a very powerful stand‑alone mixer
amplifier.

• Cross over: Provides HPF, LPF up to the 8th order for
each channel.

• Output EQ: Every zone has a 8‑band fully functional
parametric EQ. It also contains the dynamic bass
enhancement feature.

• Delay: Output delay for 120ms per channel.

• DRC (Dynamic Range Compressor): Threshold, ratio,
attack, release, and gain per channel.

• Output level: Ability to limit an amplifier channels
output.

• Output Level mixer: Each amplifier output is
separately controlled on the one screen making it
easy to adjust and operate.

• Fault and thermal indication per amplifier channel.

• Channel mute and system mute.

2 | PLM-4Px2x PLENA matrix DSP Amplifiers

• Manual standby.

• Control via PC GUI and/or iOS control app. Third
party control software can be used to control the
output level mixer and standby modes over ethernet.

Dynamic Bass Enhancement

An area that is tuned well and sounds good at normal
levels can sound thin when the volume is turned down.
The Dynamic Bass Enhancement automatically gives a
more full sound even at low SPL. When the zone is
restored to the normal level the bass enhancement
decreases proportionally to the restore the preset
level and tuning.

Standby and auto standby mode

The standby mode reduces the environmental impacts
and the running costs of owning power amplifiers,
making it much more cost effective and
environmentally friendly than other amplifiers.
Standby can be engaged and disengaged manually via
the PC GUI software, or with the addition of a Bosch
motion detector it can become an “auto standby
mode”. In zone(s) where activity has stopped the
amplifier will automatically shift to a low power
consumption mode after a pre determined time. When
the area does become active again the amplifier simply
restores to being fully active in under a second by
ramping the background music back in smoothly.
The amplifier also comes equipped with a 12 VDC
power output, to make installation of motion detectors
simple and easy.

Certifications and approvals

In addition there is an balanced line level override
input that can activated by a contact closure. This
input will override all the other inputs in the amplifier.

Output

Connections to 100V, 70V, 8 ohm and 4 ohm outputs
are available for each channel. Outputs can be bridged
channels 1‑2 and/or 3‑4 via dip switches. All output
impedances and configurations are supported
simultaneously. So as an example: Ch1‑2 are bridged
with a 4 ohm load, Ch3 has 100V and Ch4 has a 8 ohm
load; This is all possible with no loss of performance.

Parts included

Quantity Components

1 PLM‑4P125 or PLM‑4P220 Power Amplifier

1 Power cord

1 Set of 19”mounting brackets

1 CAT 5 cable 26 AWG shielded (1 m)

1 Safety documentation

Technical specifications

Electrical

Power supply

Mains voltage:

• Nominal input voltage 100 - 240 VAC ±10%,
50/60 Hz

Safety According to EN 60065

EMC emission According to EN 55103‑1

EMC immunity According to EN 55103‑2

Region Certification

Europe CE

CE

Installation/configuration notes

Connections and Amp Link

Inputs

The PLM‑4Px2x amplifiers are equipped to be used
with either TRS jack, 3 pin XLR or Phoenix Euroblock
on each of the input channels. As these connections
are wired in parallel; simply loop out via the
connection that isn't being used as the input. In
addition the Amp Link input makes connection to the
PLM‑8M8 DSP matrix mixer very easy. Simply connect
the supplied CAT 5 cable to the Amp Link ports on
each unit and it carries 4 channels of audio from the
DSP matrix mixer to the amplifier. No set up or
configuration required.

• Input voltage limits 90 - 264 VAC

Power consumption (-6dB/idle/
standby):

• PLM‑4P125 254 W / 27 W / 6 W

• PLM‑4P220 412 W / 36 W / 6 W

Performance

Rated outputs voltage/impedance 100 V / 70 V / 8 ohm / 4 ohm

Rated output power per channel
(continous *):

• PLM‑4P125 130 W

• PLM‑4P220 220 W

Rated output power per channel
(burst *):

• PLM‑4P125 130 W

• PLM‑4P220 220 W

Bridged (CH 1‑2 / 3‑4) (continous *):

• PLM‑4P125 250 W

• PLM‑4P220 385 W

Bridged (CH 1‑2 / 3‑4) (burst *):