Set The Loudspeaker Parameters (Filter) - Bosch SYNSONA PRM-4P600 Installation Manual

30 en | Installation
5.1.3

Set the loudspeaker parameters (FILTER)

The amplifier's FILTER settings enable the output audio to be optimized to suit particular
types of speakers (e.g. subwoofers) or particular environments, allowing some optimization
for voice/speech by reducing the low frequency feedback.
100 V
70 V
8 Ω
4 Ω
HP100
HP150
LP150
FLAT
–
–
–
–
Refer to
–
2024.01 | V03 | F.01U.402.247
AMP MODE FILTER
CH 1 CH 2 CH 1 CH 2
DUAL PARALLEL CH 1/2
Mode DIP switch
1
Up
Up
Down
Down
HP100
The HP100 implements a high-pass filter with a 24 dB/Oct slope at 100 Hz within the
signal path. It is particularly suited for speech and voice announcements, as it
effectively attenuates undesirable low-frequency signals, such as microphone handling
noise.
HP150
The HP150 implements a high-pass filter with a 24 dB/Oct slope at 150 Hz within the
signal path. Designed for implementation in a 2-way system, working in conjunction
with a compatible subwoofer to further diminish low-frequency content. This
configuration is especially useful for applications involving paging horns and very small
ceiling speakers, where minimizing low-frequency content is desirable.
LP150
The LP150 implements a low-pass filter with a 24 dB/Oct slope at 150 Hz within the
signal path. It is intended for use in conjunction with a subwoofer, utilizing the HP150
settings to drive matching speakers.
FLAT is suitable for full-range operation. However, for 4 and 8 Ohm operation, a 30 Hz
high-pass filter (with a slope of 24 dB/Oct) is applied in the signal path to attenuate
extremely low-frequency noise. In the case of 70 V and 100 V operation, this high-pass
filter is set at 50 Hz to avoid transformer saturation.
Indicators, controls and settings, page 26
APD
HP 100 100 V
OFF
HP 150 70 V
ON
LP150 8 Ω
FLAT 4 Ω
DIP switch
2
Up High Pass filter @100 Hz, 24 dB/
Down High Pass filter @150 Hz, 24 dB/
Up Low Pass filter @150 Hz, 24 dB/Oct.
Down Full range operation
Installation manual
SYNSONA amplifiers
AMP MODE FILTER
CH3 CH4 CH3 CH4
DUAL PARALLEL CH 3/4
Description
Oct.
Oct.
Bosch Security Systems B.V.
HP 100
OFF
HP 150
ON
LP150
FLAT