Crown I-Tech I-T4000, Operation Manual

Page: 18 / 52

Operation Manual
I-Tech Series Power Amplifiers
page 18
Output Mode: Press an Encoder knob to select DUAL or BRIDGE
(Bridge Mono). You will be prompted to confirm your choice. Press
and hold an Encoder knob to confirm your choice. DUAL is the
default. The Bridge indicator on the front panel will illuminate when
the amplifier is bridged.
Input Y: Press an Encoder knob to select STEREO or Input Y. You
will be prompted to confirm your choice. Press and hold an Encoder
knob to confirm your choice. When INPUT Y is enabled, Channel
1's input signal feeds both channels. STEREO is the default. (This
screen will not display in Bridge Mono mode).
Presets: A preset is a group of DSP and amplifier settings for a
particular speaker. Turn an Encoder to view presets 1 through 20.
To recall a preset, press the Encoder, then press and hold the
Encoder to confirm. The last recalled preset name is displayed in
the upper right corner. For more information on presets, see Section
4.3.
In the example shown below,
• Preset 7 was the last recalled preset (it’s in the upper right).
• The amplifier settings have been modified (M) since Preset 7 was
loaded.
• Preset 7 will be recalled if the Encoder is pressed, making it
active.
• Preset 7’s Channel-1 label is “MF–1&2”.
• Preset 7’s Channel-2 label is “MF–3&4”.
Attenuator Link: Allows either attenuator (Encoder) to control
both channels. Push an Encoder knob to select Independent or
Linked. Once the attenuators are linked, any difference in channel
attenuation will be maintained, and the word LINK appears on the
Attenuation screen.
Attenuator Limits: You can set the minimum attenuation from 0
dB to –100 dB. This feature allows you to set a limit on the attenua-
tors. Once set, attenuation cannot be adjusted above this level. The
attenuator limit appears as a line in the attenuator bar meter.
NOTE: The attenuator setting must be below the attenuator limit that
you are trying to set. For example, if the attenuator is set at –3 dB,
you cannot set the attenuator limit below –3 dB unless you also
decrease the attenuator level.
4.2.3 ADVANCED MENU
When you see this screen, press an Encoder knob to enter the
Advanced Menu, described next. You can go to the Advanced Menu
screen from the Attenuation screen by pressing
Menu/Exit > Prev > Prev .
Me/You Amp Finder: Allows users to identify a specific amplifier in
a large network of amplifiers without having to compare address infor-
mation. Me/you can be turned on/off from software and/or the front
panel. Press an Encoder knob to turn on the Me/You amp finder.
When on, the menu-button LEDs flash.
To download presets for a particular loudspeaker unit, visit
www.IQaudiosystems.com.
-9.0 -9.0 -9.0 -9.0
Attenuator Limits Attenuator Limits
dB dB
LED Meter Display Type: Press either encoder to make the
front-panel output LEDs display average or peak values. This menu
changes the operation of the –10 and –20 output LEDs only.
Bar Meter Display Type: You can select what the bar meters will
display in the Attenuator Screen. Press an Encoder knob to select
Attenuation, Input Levels, Output Levels, or Thermal %.
Attenuation is displayed as the length of the bar meters in the Atten-
uation screen that appears on startup. Input Levels and Output Lev-
els are displayed as both average and peak in the bar meters.
Thermal % indicates the amplifier temperature in percent, where
100% is the maximum allowable temperature. If Thermal % reaches
100%, the amplifier is out of thermal headroom and has shut down.
OUTPUT LEVELS OUTPUT LEVELS
Bar Meter Display Type Bar Meter Display Type
Clip Limiter: Limits the output signal to prevent excessive clip-
ping. Press an Encoder knob to select ON or OFF for each channel.
OFF is the default.
4 Advanced Operation
In the example shown below, the user turned an Encoder knob.
• Preset 7 was the last one recalled (it’s in the upper right).
• Preset 7 is active (A). That means the amplifier state matches the
preset.
• Preset 5 will be recalled if the Encoder is pressed, making it active.
• Preset 5’s Channel-1 label is “LF–1&2.”
• Preset 5’s Channel-2 label is “LF–3&4.”
Presets Presets
5
Preset 7(A) Preset 7(A)
Preset 5 Preset 5
CH1: CH1:
CH2:
CH2:
LF-1&2 LF-1&2
LF-3&4
LF-3&4
AVERAGE AVERAGE
LED Meter Display Type LED Meter Display Type
Presets Presets
7
Preset 7(M) Preset 7(M)
Preset 7 Preset 7
CH1: CH1:
CH2:
CH2:
MF-1&2 MF-1&2
MF-3&4
MF-3&4