Bosch Appliances Car Amplifier PLE-2MA120-EU User Manual

Bosch Security Systems | 2007-10 | PLE-2MA120-EU,  PLE-2MA240-EU en

Plena Mixer Amplifier | Installation and User Instructions | Connections and settings

 en | 24

Rotary control

Effect

Typical example

Ducking level control

Sets the required ducking level when VOX and/or 

push to talk is active (see table 4.1). When the 

ducking level is set to mute, the music volume will be 

fully attenuated; when the ducking level is set to mix, 

both music and speech inputs can be heard - music 

and speech will be mixed. When ducking the music 

input is ducked (attenuated), the microphone/line 

inputs are always muted when a call is made.

Set the ducking level control to 

mute if you want the 

announcement to be heard without 

background music.

Chime volume 

control

Alters the chime volume. The mid range is -8 dB 

(40 V), which should be sufficient for most 

applications. Test the chime by switching on 

microphone 1. Remove the microphone after testing 

if it is not further required.

Set the volume of the chime to a 

higher level when the system is 

being used in large open areas or 

when important announcements 

have to made.

Telephone 

emergency/100V 

volume control

Attenuates the emergency announcement or signal. 

Control range from -25 dB to 0 dB. For safety 

reasons, the volume of the emergency 

announcement or signal cannot be fully set to zero.

Set the volume of the emergency 

announcement to a higher level 

when the system is being used in 

large open areas.

Note
When PTT or VOX are selected, the ducking 

control controls between 3 dB attenuation (very 

little ducking) to –∞ dB (muted).

When ducking, the music is also present on the 

Call only output. If you do not want this, set the 

ducking control to mute.

When ducking, music in a non-selected zone is 

also affected.

Slide switch setting

Effect

Typical example

Line out 

All mixed inputs (microphone/line, emergency, and 

music) are available.

Various set-ups are possible.

Music only

A dedicated music out source is available for another 

external device. Only the music inputs (19, 20, and 

21) are available. All other inputs, including the 

Tel. emergency/100V input will be overridden.

The “music master output” can be 

connected to a telephone system, 

so that callers can listen to music 

when they are put on hold.