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6.0 E-4 System Setup
Programmer’s Note:
If you are using the E-4 system
to drive speakers that are not Bose
®
products, choose
one of the four high-pass filter settings at the end of the
list.
If you change the speaker EQ type, any subzones will be automati-
cally changed to the new Speaker EQ setting, and be given the
default loudspeaker tap. Depending on the quantity and tap of
speakers, you could receive an error message notifying you that the
system exceeds the 400 W limitation of the E-4 system. If this prob-
lem occurs, delete the subzones from the subzone list. This will
allow you to change the speaker EQ type.
Subzones table
– The Subzones table allows you to document
the speakers used in a zone.
A zone is a group of speakers that are driven by the same ampli-
fier output channel. A subzone is a group of speakers within a
zone that use a common tap or are of a common type.
For example, you may have installed ten Model 16 speakers in a
dining room and set it up as a zone to be driven by channel 1. In
this zone you may have established two subzones, one with five
Model 16 speakers tapped at 8W and the other with five tapped
at 16W.
To add a subzone
Click the
Add
button. When the Add Subzone window appears,
enter a name for the new subzone, select the speaker model
installed, enter the quantity, and select a tap setting. The Model
Name list will include only speakers that are compatible with the
Speaker EQ you selected.
Click
OK
to add the selections to the subzone table.
To delete a subzone
In the subzones table, select the subzone to be removed and
click the
Delete
button.
6.3.3 Input gain
The Input Gain controls allow you to adjust the input gain level to
the system and turn the Source Leveling feature on or off.
Factory default settings
Programmer’s Note:
Input gain controls are disabled if
the input channel is routed to a zone in which Auto Vol-
ume is enabled (on). You will only be able to change/
adjust the input gain by resetting the Auto Volume for the
affected zone.
Input gain circuit block diagram
Input Type
Initial Gain
Gain Range
Source Leveling
Mic
40 dB
80 dB
Off
Line
0 dB
60 dB
Off
Mic Page
40 dB
80 dB
On
Line Page
0 dB
60 dB
On
Source type
Gain
slider
Source
leveling
On/Off
Mic phantom
power On/Off
Signal
present
indicator
Input gain
meter
SRC
LEVEL
EQ
* Only available for MIC/LINE and MIC/PAGE/LINE inputs.
See “Zone EQ” on page 53 for details.
Gain
adjustment
Signal
detector
Signal
level
meter
3-band
equalizer*
Source
leveling