Routing
Low-Z mode
High-Z mode (Direct Drive )
CH 1
CH 2
CH 1 + 2
Dual A – B
Master A summed
Master B summed
-
Dual A – AUX
Master A summed
AUX
-
Dual B – AUX
Master B summed
AUX
-
Table 6.1: Amplifier routing
Speaker processing (LPN)
The power amplifier channels of the PM 502 incorporate Low-Pass-Notch filters (LPN)
exclusively designed by DYNACORD. The LPN filter corrects the frequency and phase response
of the connected loudspeakers. This effect can not be achieved using equalizers or „Bass-
Boosters“, because the LPN filter mainly optimizes the transient response of the connected
speaker. The result is a more powerful sound, especially when using small to medium full-
range speakers.
Please refer to section Menu, page 26, how to edit the LPN filters setting. The following table
describes the available LPN filter settings.
Setting
SPEAKER
PROCESSING
indicator
Description
HIGH
ON
In setting HIGH the LPN filter is activated, this setting is
recommended for small to medium sized loudspeakers, e.g. full-
range speakers with 12“, 8“ or smaller woofers.
MEDIUM
ON
In setting MEDIUM the LPN filter is activated, this setting is
recommended for medium to large loudspeakers, e.g. full-range
speakers with 15“ or 18“ woofers.
FLAT
OFF
In setting FLAT the LPN filter is deactivated. Use this setting for
large loudspeaker systems with more than one subwoofer.
Table 6.2: LPN filter settings
AUX mode
The signal that is to be output via AUX OUT can be selected for the particular application.
Please refer to section Menu, page 26, how to edit the AUX mode. The following table lists all
AUX modes available.
6.4
6.5
PM 502
Configuration | en
17
Bosch Sicherheitssysteme GmbH
User manual
15-May-14 | 02 | F01U297804
