I-Tech Series Power Amplifiers

4 Advanced Operation

4.2 Navigating the LCD Control Screen

4.2.1 Introduction

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.

Figure 4.1 Parts of the LCD Control Screen

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.

Attenuation Preset 12 (M)

-23.0 dB -23.0

Operation Manual

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.

Attenuation Preset 1 (M)

MUTE dB -16.5

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.

4.2.2 BASIC MENU

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.

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.

Basic Menu Items

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.

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.

CH1 Sensitivity

5.4826.0

RMS Volts

dB Gain

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.

CH2 Sensitivity

2.7831.9

RMS Volts

dB Gain

 

 

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Crown Audio I-Tech Series Navigating the LCD Control Screen Introduction, Attenuation and Bar Meters, Mute/Unmute
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I-Tech Series specifications

The Crown Audio I-Tech Series represents a pinnacle of power amplification technology, designed to meet the demanding needs of live sound reinforcement and installation applications. Renowned for their flexibility, efficiency, and sound quality, these amplifiers integrate cutting-edge features that appeal to both professional audio engineers and musicians alike.

One of the key technologies employed in the I-Tech Series is the use of DriveCore technology. This innovative design allows the amplifiers to achieve high power output while minimizing size and weight. The DriveCore technology combines the efficiency of Class D amplification with superior sound quality, yielding a lightweight solution that maintains high fidelity and low distortion even at peak volumes.

The I-Tech Series amplifiers come equipped with a comprehensive suite of digital signal processing (DSP) capabilities. Each amplifier integrates sophisticated DSP algorithms that enable advanced speaker management, including extensive equalization, delay settings, and limiting controls. This ensures optimal performance for a variety of loudspeakers and installation scenarios, allowing users to tailor the output to the specific acoustical environment.

Connectivity is another strong point for the I-Tech Series. The amplifiers often include a variety of input options, providing flexibility for different setups, whether analog or digital. The inclusion of Ethercon connectivity enables seamless integration into a networked environment, allowing for remote control and monitoring via Crown's sophisticated software interface. Users can access real-time data about the system's performance, making adjustments on-the-fly to maintain optimal sound quality.

Durability and reliability are fundamental characteristics of the Crown I-Tech amplifiers. Built to withstand the rigors of touring and the demands of permanent installations, these amplifiers are housed in rugged enclosures that dissipate heat effectively while maintaining a compact form factor. Integrated protection circuits safeguard against over-temperature, over-current, and short-circuits, ensuring longevity even under extreme conditions.

In terms of power output, the I-Tech Series features a range of models, each capable of delivering substantial wattage to drive large sound systems with authority. The efficient cooling design allows for extended use without compromising performance, making them suitable for both large concerts and smaller venues.

In summary, the Crown Audio I-Tech Series amplifiers combine advanced technologies, including DriveCore and flexible DSP, to deliver powerful and high-quality audio performance. Their robust design, comprehensive connectivity options, and tailored control make them a premier choice for audio professionals seeking reliable and effective amplification solutions.
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