Bose FREESPACE 4400 User Manual

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In order to use paging in a zone, first you must assign the PAGE 
source to the zone. Then select the appropriate settings in the 
Page Setup (page 40) control pane.

An input source EQ control panel is available for inputs 3 and 4. 
This three-band equalizer is used primarily to compensate for 
microphone response or for handling noise. 

Click and drag each slider to the level you want. The scale on the 
left side of the panel is expressed in dB.

The center frequency and shape of each EQ band is fixed and 
can be adjusted by ±6 dB.

• The low-frequency EQ (LF-EQ) is a low-pass shelf EQ with a 

corner frequency of 125 Hz and a roll-off of 6 dB per octave.

• The mid-frequency EQ (MF-EQ) has a center frequency of 

 

1.6 kHz and a Q of 1.

• The high-frequency EQ (HF-EQ) is a high-pass shelf EQ with a 

corner frequency of 8 kHz and a roll-off of 6 dB per octave 
below this point.

The Page Setup control panel is used to set up the PAGE/MIC/
LINE 4 input for paging. The page setup is available when “Mic/
Page” or “Line/Page” is selected for “Type” in the Input Gain con-
trol panel. 

Since the Opti-voice paging system implements predetermined 
settings for ducking depth and release time and source EQ, this 
is the most efficient setup method. After the Opti-voice paging 
system is turned on, the rest of the setup depends on the chosen 
detection method.

Set Opti-voice control to On in the Page Setup control 
panel.

Select a detection method. If you select PTT, there is no fur-
ther setup required. If you select Auto, continue.

Ask another person to talk into the paging microphone at the 
lowest volume that will normally be used.

Lower the Page Threshold slider to the level where the page 
active light is constantly on.

Check your page threshold setting to make sure that no 
environmental noise, such as a music source or background 
noise, triggers the page.

If you hear the music source continually ramping up and 
down, the environmental noise is triggering a page. If this 
occurs, try one of the following:

• Increase the page threshold level.

• Lower the taps on the loudspeakers near the page mic.

• Change the page mic location.

0 dB

0 dB

0 dB

MF-EQ

LF-EQ

HF-EQ

∑

Fixed-zone

PTT

On