I-Tech HD Series Power Amplifiers

4 Advanced Operation

4.8.11 LevelMax Suite

This is a suite consisting of a peak voltage limiter, average power limiter, clip limiter and thermal transducer limiter. First you will set the mode to automatic or advanced:

•Automatic mode: The software determines the best settings based on the signal characteristics. You can modify only the RMS threshold, Speaker Thermal threshold and time constant. Everything else is set automatically.

•Advanced mode: You can modify the RMS threshold, Speaker Thermal threshold, time constant, Peak threshold and Peak/RMS release.

Peak Voltage Limiter

This limits the peak voltage output of 4.8 the amplifi er. On: Enables or disables this function. You’ll set the parameters below:

•Threshold: Sets the level, in absolute voltage, which the limiter will allow from the amplifi er. The

range is from 12 Vpk to 255 Vpk.

•Attack Time: Sets the attack time of the limiter. The attack time is defi ned as the time it takes the limiter to attenuate the output signal by 20 dB. The range is from 1 millisecond to 100 milliseconds. The Instant setting attack time is instant (0 millisecond).

•Release Time: Sets the release time of the compressor. The release time is defi ned as the time it takes the limiter to increase the output signal by 20 dB. The range is from 10 milliseconds to 10 seconds.

Average Power Limiter

This limits the long-term output power of the amplifi er. You’ll set the parameters below:

•Threshold: Sets the average power level, in watts, which the limiter will allow from the amplifi er channel. The range is from 10 watts to 10,000 watts. This level should be set to the connected loudspeaker’s long-term power rating. Also you must enter the loudspeaker’s nominal impedance.

•Attack Time: Sets the attack time of the limiter. The attack time is defi ned as the time it takes the limiter to attenuate the output signal by 20 dB. The range is from 1 second to 30 seconds.

•Release Time: Sets the release time of the compressor. The release time is defi ned as the time it takes the limiter to increase the output signal by 20 dB. The range is from 1 second to 30 seconds.

Clip Eliminator: This limiter monitors the clip events and attenuates the input signal to prevent amplifi er clipping. The attack and release times are preset to optimum rates. Only one parameter controls this limiter. “Enable” enables or disables this limiter.

A lookahead feature prevents overshoot of the limiters. These settings were developed with JBL to protect the speakers from overvoltage.

Transducer Thermal Limiting

This limits the long-term output power of the amplifi er to what the loudspeaker load can handle without overheating and going into thermal compression. You can set the thermal level at which the thermal limiter engages, the thermal response time and thermal voltage. Your loudspeaker manufacturer might be able to provide this information. Meters show the amplifi er output level in dBFS; and peak, rms, and total gain reduction.

4.8.12Front Panel Security Here you can choose which amplifi er LCD screens to lock so they can’t be changed.

Operation Manual

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Crown Audio IT9000 HD, I-T5000 HD LevelMax Suite, Peak Voltage Limiter, Average Power Limiter, Transducer Thermal Limiting
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I-T9000 HD, I-T12000 HD, IT9000 HD, I-T5000 HD specifications

Crown Audio has established itself as a leader in the audio amplification industry, and its IT series, including the IT9000 HD, I-T9000 HD, I-T5000 HD, and I-T12000 HD, exemplifies this commitment to quality and innovation. These amplifiers are engineered to deliver exceptional audio performance, reliability, and user-friendly operation, making them ideal for a variety of applications, from concert sound to installed audio systems.

The IT9000 HD is a powerhouse that provides robust performance through its high-efficiency design. Featuring advanced Class I technology, it can deliver a staggering output of up to 9000 watts. This model is built with a lightweight, compact chassis that allows for easy installation and portability. The IT9000 HD incorporates Crown’s proprietary DriveCore technology, which combines the amplifier’s driver and output stage into a single chip, significantly increasing efficiency and reducing the overall size of the amplifier.

Next in line, the I-T9000 HD offers similar power output capabilities but adds flexibility with its network connectivity options. This model supports the latest in digital signal processing, allowing users to tailor their audio system with precision. It also features intelligent fan cooling technology that adjusts the fan speed based on heat generation, ensuring optimal performance under varying load conditions.

The I-T5000 HD stands out with its unique ability to deliver a maximum of 5000 watts, making it an ideal choice for smaller venues or mobile applications where power-to-weight ratio is critical. It shares many of the technological advancements of its larger counterparts, including enhanced DSP capabilities and comprehensive monitoring via onboard indicators and remote software control.

Lastly, the I-T12000 HD is the flagship model in this series, capable of an impressive 12000 watts output. It boasts advanced power management features and offers multiple operating modes, including stereo and bridged operation. The I-T12000 HD is designed for the most demanding applications, ensuring ultra-reliable performance and pristine sound quality in even the largest spaces.

All models in the Crown IT series feature a rugged construction for durability, along with intuitive front-panel controls for easy operation. They also include comprehensive network control options, allowing users to manage and monitor their systems remotely via DSI (Digital Signal Interface) and DSP capabilities.

In conclusion, Crown Audio's IT9000 HD, I-T9000 HD, I-T5000 HD, and I-T12000 HD amplifiers represent the pinnacle of amplifier technology, delivering unmatched performance, efficiency, and versatility for a wide range of audio applications. Whether for live events or permanent installations, these amplifiers provide the power and reliability necessary to meet the demands of modern audio environments.
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