Crown Audio Optimize Your I-Tech Amplifier DSP Settings with IQwic
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I-Tech Series Power Amplifiers

4 Advanced Operation

4.3 Presets

4.3.1 Introduction

Your I-Tech amplifier has a wide variety of onboard Digital Signal Process- ing (DSP). Some applications for this DSP are speaker configuration (set- ting the drive levels, frequency bands, delays and limiting for your particular speakers), EQ, filtering, compression, and much more. Those functions are described in Section 4.6. IQwic or System Architect software lets you adjust the DSP settings, such as filter slope, compression ratio, EQ frequency bands, and so on.

A preset is a group of DSP settings that configure the amp for a specific application. For example, you might use one preset that optimizes the amp’s DSP for a JBL Vertec Line Array. You might use another preset that sets up the DSP for a stereo pair of loudspeakers of your choice. You can choose any of 20 presets with the LCD Control Screen.

The I-Tech amplifier works with two types of presets:

1.User presets. Using IQwic or System Architect, you can create your own custom DSP presets, label them, and send them to the I-Tech ampli- fier. The amp stores those presets in firmware. You can recall those presets from the LCD Control Screen.

2.Downloadable presets. Crown and JBL engineers have designed presets that are optimized for various JBL loudspeakers, such as Vertec Line Arrays. You can download presets from http://www.crownaudio.com/ amp_htm/itech-download.htm. Then in the software, send the preset files to the I-Tech amplifier, where you can recall them from the LCD Control Screen.

We will describe each type of preset in detail.

4.3.2 User Presets

User presets are DSP presets that you set up. This is the basic procedure:

1.Adjust the DSP settings as desired in the IQwic or System Architect soft- ware (not with the LCD Control Screen).

2.Save this group of settings as preset. Give it a label.

3.Download the preset to the I-Tech amplifier. See the software Help file for details. Basically, you will open and engage a data frame.

4.Select that preset from the LCD Control Screen. The preset will automat- ically set the DSP parameters as you set them up in IQwic.

Setting the parameters of the DSP in the I-Tech amplifier is done using the control software, not by the amplifier’s LCD Control Screen. For example, if you want to set filter Q, compression ratio, or graphic EQ, you would do so within the IQwic software.

After setting the DSP parameters as desired,

1.Save them as a preset in the software. Presets are stored and recalled through the Presets Page in IQwic. See the Presets Help file in IQwic for details. In System Architect, Presets are stored and recalled from the main panel. Descriptions are edited on the General page.

2.Download the preset to the I-Tech amplifier. See the Help file for details. Basically, you will open and engage a data frame.

3.When you want to recall the preset, select it on the LCD Control Screen.

4.3.3 Downloadable Presets

Crown and JBL engineers have designed I-Tech DSP presets that are opti- mized for various JBL loudspeakers, such as Vertec Line Arrays. To use them, follow this procedure in IQwic:

1.Go to the I-Tech website at www.crownaudio.com/itech/.

2.Select Downloads.

3.Click on the file of your choice. It will download to your computer.

4.In IQwic, select File > Open. Browse to the downloaded preset file and open it.

5.In IQwic, see the Help file on Presets for details on downloading the pre- set to an I-Tech amplifier. Basically, you will open and engage a data frame. The file will overwrite the preset you designate.

6.Recall the preset from the LCD Control Screen. Then your amp will be configured to work with the specified loudspeaker model.

4.4 Digital Audio Options (AES/EBU)

Digital audio inputs allow you to keep the amplifier input signals in the digital domain. Keeping the input signal digital reduces the number of Dig- ital-to-Analog and Analog-to-Digital conversions. This provides better sound quality and reduces pickup of electrical interference.

The AES/EBU connector provides the most widely accepted format. Con- nect an AES/EBU signal to the AES/EBU connector on the rear panel.

Operation Manual

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Contents 11/07 T4000 T6000 T8000Some models may be exported under the name Amcron 137289-10Importantes Instructions de Sécurité Important Safety InstructionsEMC Standards Safety StandardEuropean Representatives Name and Address Family Name I-TechFor bridge-mono operation, see Quick-Start Guide Stereo WiringGetting Started With I-Tech Figure A.5 Rear Panel Connections for Bridge-Mono Wiring Quick-Start Guide Bridge-Mono WiringTable of Contents How to Use This Manual FeaturesHigh power density, up to 8000 watts in a 2U chassis Analog and digital thru connectorsUnpack and Install Your Amplifier SetupWire Inputs and Outputs Wiring basics Connecting to AC MainsDistance Choose Input Wire and ConnectorsChoose Output Wire and Connectors Important Turn off the amplifier and unplug its power cord Stereo Mode WiringReach maximum attenuation Bridge-Mono ModeProtecting Your Speakers Startup ProcedurePrecautions OperationFront Panel Controls and Indicators Cooling Vents Back Panel Controls, Indica- tors and Connectors Fans Advanced Operation Advanced Operation Table of ContentsFront Panel Lockout Navigating the LCD Control Screen IntroductionAttenuation and Bar Meters Mute/UnmuteCH1 LF-1&2 CH2 LF-3&4 Menu/Exit Prev PrevDigital DIG Analog Anlg OFF vOFF 114 Menu Tree Operation ExamplesPress Menu/Exit Operation Example Digital Audio Options AES/EBU Presets IntroductionUser Presets Downloadable PresetsAddress Devices on the Network Network Setup WizardFix Errors Individually Select Network CardError Reporting Input Signal Level MonitorPower/ Standby Control Signal MuteClip Eliminator Input Signal Compressor/LimiterAverage Power Limiter Memory Backup ConfigurationNoise Generator Input Signal RouterDelay Latency FiltersRated range TroubleshootingAmplifier’s Power switch is off Ethernet link is broken Input signal level is very lowSpeakers not connected Open circuit due to speaker failure Latency digital inputs SpecificationsPerformance Hz 20 kHz with 0.35% THDDimensions Crosstalk below rated power, 20 Hz to 1 kHzCommon Mode Rejection CMR 20 Hz to 1 kHz AC Line ConnectorTypical Frequency Response 1W ChartsT4000 AC Power Draw and Thermal DissipationTech 4000 AC Current Draw and Thermal Dissipation T6000 Tech 6000 AC Current Draw and Thermal DissipationT8000 Tech 8000 AC Current Draw and Thermal DissipationAdvanced Features TCP/IQ and HiQnet audio networks offer many advantages Appendix a Network BasicsTCP/IQ and HiQnet Networks 192.168.0.1 Network AddressesLet’s explain each identifier 00-0A-40-00-DC-2FAppendix B Setting Sensitivity for Best Gain Staging Service United States & Canada WarrantyWorldwide Except USA & Canada Product purchased from *Business/Individual Country Crown Audio, IncFax This page Intentionally Left Blank Crown Audio Factory Service Information This page Intentionally Left Blank This page Intentionally Left Blank

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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