Crown Audio I-Tech Series operation manual Advanced Features

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I-Tech Series Power Amplifiers

8 Advanced Features

8.1 Protection Systems

Your Crown amplifier provides extensive pro- tection and diagnostic capabilities, including thermal level control, fault indicators, high- pass filtering, DC protect, AC under/over volt- age protection, inrush limiting, and variable- speed fans.

8.1.1 Thermal Level Control (TLC)

If the amplifier becomes too hot for safe opera- tion, the TLC will engage the input compressor and the clip LED will illuminate. By compress- ing the input, the amplifier will not generate as much heat and will have a chance to cool down. The degree of compression is proportional to the amount of overheating. This feature allows the show to go on, rather than having the amplifier shut down, and only occurs in extreme situations.

8.1.2 Circuit Breaker

If the current draw of the amplifier exceeds safe limits, this breaker automatically disconnects the power supply from the AC mains.

8.2Global Switching Power Sup- ply with PFC

Thanks to its global power supply, the I-Tech amplifier works anywhere in the world. There’s no need to reset an AC mains voltage switch, and no need to order a special model. The amp will work and meet all specs on 100V - 240VAC, 50/60 Hz.

Crown’s Switching Power Supply minimizes the amplifier’s weight.

Typical non-switching power supplies require large, heavy transformers in order to produce the required power at the output stage. These transformers must be large to operate at 50 to 60 Hz (standard AC supplied by the power company).

By contrast, switching power supplies can operate with a much smaller (and lighter) trans- former because they first convert the AC up to a much higher frequency, thereby reducing waste.

Power Factor Correction (PFC) controls how your amplifier draws current from the AC mains. Instead of drawing high-magnitude cur- rent spikes that reduce the capacity of your

power distro (and couple noise into other sys- tem components), PFC draws a smooth and quiet current waveform that is in phase with the mains voltage waveform. PFC allows you to reduce the size and weight of your power distri- bution and improve the performance of your signal processors.

8.33rd Generation Class I Cir- cuitry

Class I (BCA, Balanced Current Amplifier) Interleave technology allows high levels of power output without all the associated heat found in a conventional amplifier. This highly efficient design also provides accurate, uncol- ored sound with very low distortion and a high damping factor for tight, clean bass response. And it can deliver more power to reactive loads than conventional dissipative designs (com- fortably driving the latest high-technology transducers). Class I also reduces current draw of the AC mains, providing energy conserva- tion.

8.4 Color-Coded Rear Overlay

The labels on the rear panel are color coded to group similar functions under common colors.

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Operation Manual

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Contents T4000 T6000 T8000 Some models may be exported under the name Amcron137289-10 11/07Important Safety Instructions Importantes Instructions de SécuritéSafety Standard European Representatives Name and AddressFamily Name I-Tech EMC StandardsQuick-Start Guide Stereo Wiring Getting Started With I-TechFor bridge-mono operation, see Quick-Start Guide Bridge-Mono Wiring Figure A.5 Rear Panel Connections for Bridge-Mono WiringTable of Contents Features High power density, up to 8000 watts in a 2U chassisAnalog and digital thru connectors How to Use This ManualSetup Unpack and Install Your AmplifierConnecting to AC Mains Wire Inputs and Outputs Wiring basicsChoose Input Wire and Connectors Choose Output Wire and ConnectorsDistance Stereo Mode Wiring Important Turn off the amplifier and unplug its power cordBridge-Mono Mode Reach maximum attenuationStartup Procedure PrecautionsOperation Protecting Your SpeakersFront Panel Controls and Indicators Cooling Vents Back Panel Controls, Indica- tors and Connectors Fans Advanced Operation Table of Contents Advanced OperationNavigating the LCD Control Screen Introduction Attenuation and Bar MetersMute/Unmute Front Panel LockoutMenu/Exit Prev Prev CH1 LF-1&2 CH2 LF-3&4OFF v Digital DIG Analog AnlgOFF 114 Operation Examples Press Menu/Exit Operation ExampleMenu Tree Presets Introduction User PresetsDownloadable Presets Digital Audio Options AES/EBUNetwork Setup Wizard Fix Errors IndividuallySelect Network Card Address Devices on the NetworkInput Signal Level Monitor Power/ Standby ControlSignal Mute Error ReportingInput Signal Compressor/Limiter Average Power LimiterMemory Backup Configuration Clip EliminatorInput Signal Router Delay LatencyFilters Noise GeneratorTroubleshooting 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 Specifications PerformanceHz 20 kHz with 0.35% THD Latency digital inputsCrosstalk below rated power, 20 Hz to 1 kHz Common Mode Rejection CMR 20 Hz to 1 kHzAC Line Connector DimensionsCharts Typical Frequency Response 1WAC Power Draw and Thermal Dissipation Tech 4000 AC Current Draw and Thermal DissipationT4000 Tech 6000 AC Current Draw and Thermal Dissipation T6000Tech 8000 AC Current Draw and Thermal Dissipation T8000Advanced Features Appendix a Network Basics TCP/IQ and HiQnet NetworksTCP/IQ and HiQnet audio networks offer many advantages Network Addresses Let’s explain each identifier00-0A-40-00-DC-2F 192.168.0.1Appendix B Setting Sensitivity for Best Gain Staging Service Warranty United States & CanadaWorldwide 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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