Crown i-t4000 Guía Del Usuario

The LCD Control Screen and its controls let you configure the ampli-
fier and access many features that before were available only through 
a remote computer. Also, you can recall DSP presets for certain loud-
speaker models. (Some DSP parameters cannot be adjusted with the 
LCD Control Screen. That is done in System Architect or IQwic.) 

Figure 4.1 shows the parts of the LCD Control Screen. Its functions 
are described below. NOTE: Listed functions can also be controlled in 
System Architect or IQwic. The LCD-screen Menu Tree is on Page 21.

Attenuation and Bar Meters
On power-up with the factory defaults, the LCD Control Screen dis-
plays the attenuation in dB and on bar meters. To change the atten-
uation in either channel, turn the Encoder. Attenuation changes 0.5 
dB per detent when you turn the Encoder slowly, and more when 
you turn the Encoder quickly. The current preset name is displayed 
in the upper-right corner. The (M) is explained on page 18 under 
Presets.

If Attenuator Limits have been set (in the Attenuator Limits screen, 
described later), small lines showing those limits will appear in the 
bar meters as shown. If the attenuators for both channels are linked 
(in the Attenuator Link screen, described later), the word LINK 
appears. If there is an error in the error log, an exclamation point 
appears at bottom center.

Front Panel Lockout
The amplifier’s administrator can control access to menu mode and 
the amplifier’s attenuators. This lockout can be done either by the 
front panel buttons or by System Architect or IQ software.

To lock or unlock the menu with the front-panel buttons: press Next 
and Prev

 

simultaneously. To lock or unlock the menu with System 

Architect or IQ software: in the IQwic Control Panel, go to the Gen-
eral Page and press the lockout button.

If the lockout is done from the software, the user can disable the 
lockout only in the software, not by pressing the front-panel but-
tons.

If the menu is locked and you press any button or turn an Encoder, 
the word “LOCKED” is displayed.

Getting around in the Menu is intuitive. Here are the basic opera-
tions:

• Press Menu/Exit to enter the main menu.
• Press Next to go to the next item in the menu. 
• Press Prev

 

to go to the previous item in the menu. 

• Turn or press either Encoder knob to change the value of the dis-
played parameter.
• Press Menu/Exit to leave the menu and return to the Attenuation 
screen at any time.

CH1 Sensitivity: Sets the input sensitivity of Channel 1. Turn an 
Encoder knob to change the input sensitivity. 

Note: If you do not see the sensitivity you need, try changing the 
Maximum Analog Input level in the Advanced Features Menu 
(described later). This makes different sensitivities available.

To optimize the system gain structure, see Section 3.1 in the I-Tech 
application Guide at www.crownaudio.com/itech/pdf/137327.pdf.

Contrast: Press Menu/Exit to enter the Basic Menu. The first item 
on the menu you see is the Contrast screen. Turn an Encoder knob 
to change the contrast of the LCD screen. You can return to the 
Attenuation screen by pressing Menu/Exit, or go to other menu 
items by pressing Next or Prev.

Mute/Unmute
• To mute either channel: Press and hold an Encoder knob for 
1 second. The display will alternate between MUTE and the attenua-
tion level. While the amplifier is muted, you can adjust attentuation 
for each channel by turning an Encoder knob.
• To unmute either channel: Press and hold an Encoder knob again 
for 1 second.
The (M) is explained on page 18 under Presets.

Some menu items require confirmation: after you request a change, 
the display might say “Press and hold.” To confirm a change, press 
and hold an Encoder knob. If you don't want the change to occur 
during a confirmation, turn the knob or wait five seconds.

CH2 Sensitivity: Sets the input sensitivity of Channel 2. Turn an 
Encoder knob to change the input sensitivity. (This screen will not 
display in Bridge Mono mode).

Note: If you do not see the sensitivity you need, try changing the 
Maximum Analog Input level in the Advanced Features Menu 
(described later). This makes different sensitivities available.