Description

The Bosch PLM-4P220 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 Bosch PLM-4P220 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.

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, 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.
• 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.