Crown Audio I-Tech Series Input Signal Router, Filters, Delay Latency, Noise Generator

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I-Tech Series Power Amplifiers

4 Advanced Operation

control. When the memory backup is disabled, the amplifier stops storing changes made to its settings. When the next power-up occurs the amplifier uses the settings that were active when the backup feature was disabled.

CAUTION: Care should be taken to backup “safe” levels for the input attenuator controls. It is possible for the memory backup feature to be dis- abled with “unsafe” levels stored. This may result in significantly greater system gain the next time power is reapplied to the amplifier.

4.6.21 Input Signal Router

Each channel of the I-Tech’s signal processing has an Input Signal Router that allows the choice of audio signal that will be used by the channel. The user may choose one of the following configurations:

•Analog Audio: This is the audio input from the audio connector on the back panel of the amp. Choices for the Analog Audio input are Channel 1, Channel 2, or a sum of Channels 1 and 2.

•Digital Audio: This is the audio input from the AES/EBU connector on the back panel of the amp.

4.6.22 Filters

Each audio channel has five separate places where filters can be placed in the system. Up to 64 filters are available within the system. In addition to filtering, each possesses up to +/-24dB of gain. The following filters are available:

•Lowpass: Bessel 2-4, Butterworth1-4, and Linkwitz-Riley 8

•Highpass: Bessel 2-4, Butterworth1-4, and Linkwitz-Riley 8

•Lowshelf: Low-frequency shelving EQ

•Highshelf: High-frequency shelving EQ

•Lowpass EQ: Variable Q from 0.1 to 35

•Highpass EQ: Variable Q from 0.1 to 35

•Parametric EQ: Variable Q from 0.1 to 35

•All Pass: 1st and 2nd order

All Pass filters provide no gain change to the output, but provide a phase change at the selected frequency. This corrects the phase relationship of the output without a gain reduction, such as is found in other filters.

4.6.23 Delay (Latency)

Due to the nature of DSP processing, there is some inherent delay or latency within the I-Tech’s DSP. These delays are:

•1.13mS analog

•2.36mS digital (44.1 kHz)

4.6.24 Noise Generator

Each channel has an independent uncorrected noise generator that allows noise to be mixed into the audio signal. This is useful for noise masking applications and testing. Each channel has the following controls:

•Noise On/Off: The channel’s noise generator can be independently turned on.

•Noise Type: Full spectrum white noise or pink noise.

•Noise Level: A fader to allow the noise level to be controlled.

4.6.25 Sine-wave Generator

A sine-wave signal generator allows the mixing of a single tone into the audio signal. Typical applications can be for the injection of a high fre- quency tone (19kHz) into the signal in paging type system to continually drive the speaker, allowing continuous monitoring of the speaker load. The following controls exist:

•Sine On/Off: The sine-wave signal generator’s function.

•Sine Frequency: Controllable from 20Hz to 20kHz.

•Sine Level: Each channel’s sine-wave signal level can be indepen- dently controlled.

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-TechQuick-Start Guide Stereo Wiring Getting Started With I-TechFor bridge-mono operation, see 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 MainsChoose Input Wire and Connectors Choose Output Wire and ConnectorsDistance 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 Operation Examples Press Menu/Exit Operation ExampleMenu Tree 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 FiltersTroubleshooting Amplifier’s Power switch is offRated range Input signal level is very low Speakers not connected Open circuit due to speaker failureEthernet link is broken 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 ChartsAC Power Draw and Thermal Dissipation Tech 4000 AC Current Draw and Thermal DissipationT4000 T6000 Tech 6000 AC Current Draw and Thermal DissipationT8000 Tech 8000 AC Current Draw and Thermal DissipationAdvanced Features Appendix a Network Basics TCP/IQ and HiQnet NetworksTCP/IQ and HiQnet audio networks offer many advantages 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 Crown Audio, Inc FaxProduct purchased from *Business/Individual Country 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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