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Power amplifier
5.1.3
Set the loudspeaker parameters (SPEAKER EQ)
The amplifier's SPEAKER EQ enables 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
Mode
HP1
HP2
LP
FLAT
–
–
–
–
Refer to
–
Bosch Security Systems B.V.
AMP MODE
SPEAKER EQ
CH 1 CH 2
CH 1 CH 2
DUAL
PARALLEL CH 1/2
CH 1 - 4 switches
Up
Up
Down
Down
HP1 is optimized for speech and voice announcements as a way to reduce low frequency
feedback and microphone handling noise.
HP2 is useful for use with Mid‑High loudspeakers in 2‑way speaker systems that contain
subwoofers or to further reduce low frequency content from the loudspeakers.
LP is useful when connected to subwoofers and can be used in combination with HP2.
FLAT is designed for full range operation and contains a 30 Hz 24 dB/Oct high‑pass filter
for both 4 Ω and 8 Ω operation or the 50 Hz 24 dB/Oct high pass filter when used in
70/100 V operation.
Indicators, controls and settings, page 16
APD
HP 1
100 V
OFF
HP 2
70 V
ON
LP
8 Ω
FLAT
4 Ω
Up
High Pass filter 100 Hz @ 24 dB/Oct.
Down
High Pass filter 150 Hz @ 24 dB/Oct.
Up
Low Pass filter 150 Hz @ 24 dB/Oct.
Down
Full range operation
Installation manual
Installation | en
AMP MODE
SPEAKER EQ
CH3
CH4
CH3
CH4
DUAL
PARALLEL CH 3/4
Description
2023-01 | V02 | F.01U.402.247
19
IN1 to ALL
HP 1
OFF
HP 2
ON
LP
FLAT
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