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Bosch Plena Matrix PLM-4P125 / PLM-4P220

4 channel Matrix Mixer Amp with DSP. 100 volt line / 4 or 8 ohm. 125 watts or 220 watts per channel.

List price Ex. VAT: £1,450.00

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The Bosch PLM-4P125 and PLM-4P220 Plena Matrix amplifiers are reliable cost effective 4 channel amplifiers with bridgeable outputs. Ideal for sound systems in shopping centres, schools, churches, restaurants and conference venues.

These efficient class D amplifiers also have a DSP built in and benefit from a power saving mode which reduces running costs by 80% when areas are not in use.

The tamper resistant design has no controls on the front of the unit; DSP processes and input mixing is all controlled by GUI via PC or iOS app.

The PLENA Matrix system is designed to be versatile and easy to use. Users can control the audio settings and adjust volume levels wirelessly via an iPad® or iPhone® app. The PLM 8M8 PLENA matrix 8-channel DSP Matrix Processor provides complete control over the audio configuration and signal processing. Users can simply walk into a particular zone and confidently mix and select inputs whilst controlling output levels. From live and background music environments to high demand speech applications, this iOS app sets new standards for end user control.

The 'Amp Link' input enables the PLM-8M8 matrix mixer to be connected via CAT5 cable for a neater finish and reduced installation time.

Both the PLM 4P125 and PLM 4P220 can be used free standing or rack mounted using included 19" rack mounting ears.

PLM4P125 - 4 x 125 watts RMS, bridgeable to 2 x 250 watts

PLM4P220 - 4 x 220 watts RMS, bridgeable to 2 x 385 watts.

Additional Information

Mains power supply



100 - 240 VAC ±10%, 50/60 Hz

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



Rated outputs voltage/impedance

100 V / 70 V / 8 ohm / 4 ohm

Rated output power per channel


PLM‑4P125: 130 W

PLM‑4P220: 220 W


PLM‑4P125: 130 W

PLM‑4P220: 220 W

Bridged (CH 1‑2 / 3‑4) continuous

PLM‑4P125: 250 W

PLM‑4P220: 385 W

Bridged (CH 1‑2 / 3‑4) burst

PLM‑4P125: 250 W

PLM‑4P220: 445 W

THD+N (1 kHz, 6 dBFS)

PLM‑4P125: 0 .1 %

PLM‑4P220: 0.03 %

Frequency response (-1dB)

65 Hz to 20 kHz (+0/‑3 dB)

Crosstalk @ 1 kHz

<-70 dB



Inputs (wired in parallel)

  • 4x 3‑pin XLR balanced
  • 4x 3‑pole balanced Phoenix terminal (Metric)
  • 1x RJ45 (Amp Link)

Loudspeaker output

4x 3‑pole Phoenix terminal (Metric)

Logic and standby override

2‑pole Phoenix terminal (Metric)

Ethernet Network 10/100 Mbps


12 V output power for motion sensor

2‑pole Phoenix terminal (Metric)


Dimensions (H x W x D)

90 x 440 x 417 mm (19" wide, 2U high)


Stand-alone, 19" rack


Traffic black (RAL 9017), Silver (RAL 9006)


PLM‑4P125: Approx. 15 kg

PLM‑4P220: Approx. 18 kg

View FileEC Declaration of Conformity: PLM-4P125    Size: (722.48 KB)
View FileEC Declaration of Conformity: PLM-4P220    Size: (723.09 KB)
View FileWhy An Impedance Meter is Essential for Audio Installers    Size: (72.64 KB)
View FileBosch PLM-4P125 / PLM4P220 Datasheet    Size: (210.28 KB)
Product video for Bosch Plena Matrix PLM-4P125 / PLM-4P220
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List price Ex. VAT: £265.00