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Crown I-T6000

 

Crown I-T6000 I-Tech Amplifier

Crown I-T6000 I-Tech Amplifier

Crown International has announced the all new I-Tech Series, their new flagship amplifier series for the touring and corporate PA markets.

I-Tech packs a lot of power into a small, lightweight package, with all models being 2RU and weighing less than 28 lbs. (12.7 kg.). I-Tech is built for the road, with a rugged chassis designed to withstand abuse. I-Tech features Crown's Class-I switching output design to deliver massive amounts of power while generating a fraction of the heat of conventional designs. Crown's global regulated power supply delivers full power regardless of AC mains voltage: from 120 to 277 volts, and from 50 to 60 Hz. Power Factor Correction (PFC) allows I-Tech to draw current from the mains more efficiently, providing more power from a single 20 amp breaker. The Class-I output and advanced power supply combine to allow I-Tech to provide the highest output voltage available, for a clearly audible difference when driving today's high-performance loudspeakers.

A front panel work surface with LCD display provides fast and easy menu-based system setup and full amplifier diagnostics. AES/EBU digital audio inputs are standard, along with balanced analog XLR inputs and passive-through outputs. Crown plans to soon announce availability of integrated CobraNet digital audio inputs as an option. Integrated studio-grade DSP with 24 bit / 96kHz converters allow custom settings and factory-designed tunings to be easily loaded and recalled via onboard presets.

I-Tech amplifiers connect directly to IQ Networks, providing Crown's IQ control over industry-standard Ethernet network technology. Using mature, off-the-shelf networking technology, Crown's TCP/IQ protocol provides inexpensive network operation. By connecting I-Tech to an IQ Network and running the free IQwic software application, all amplifier controls can be accessed, and vital amplifier operating parameters monitored, from a remote location. Multiple levels of security are available to prevent unauthorized adjustment of system settings.

Minimum guaranteed power ratings are as follows: Power per channel with both channels driven:

I-T4000: 1,800W at 2 Ohms; 2,000W at 4 Ohms; 1,250W at 8 Ohms.
I-T6000: 2,500W at 2 Ohms; 3,000W at 4 Ohms; 1,500W at 8 Ohms.
I-T8000: 3,500W at 2 Ohms; 4,000W at 4 Ohms; 2,100W at 8 Ohms.

The Crown I-Tech Series offers amazing power, light weight and ease of use for touring sound and installed sound applications. Onboard DSP provides a wide array of signal processing, greatly reducing the need for rack components and rack wiring. Onboard DSP features 24-bit, 96 kHz A/D and D/A converters. All models are compatible with the HiQnet Network and TCP/IQ networking. Digital audio and HiQnet/IQ control signals connect to the amp via a single CobraNet cable in optional CN models, coming soon. Pushbutton DSP presets simplify the setup for various loudspeaker arrays. The Global Power Supply works anywhere in the world, and offers PFC (Power Factor Correction). It is a switching power supply for reduced weight. I-Tech amplifiers have the highest output voltage in the industry (200V peak), which provides clean transient peaks. The 3rd-generation patented Class-I (BCA®) circuitry couples power efficiently to the load and allows low AC current drain. A front-panel control screen shows advanced diagnostics and status information.

Features
  • Unmatched power in a 2U lightweight chassis.
  • Global power supply with Power Factor Correction.
  • Onboard DSP.
  • Connects to Harman Pro HiQnet and Crown TCP/IQ™ network (CobraNet input available in optional CN models, coming soon).
  • LCD control screen allows easy setup, diagnostics, and DSP presets for various loudspeakers.

Crown I-T6000 at a Glance:

  • Regulated Switch-Mode Power Supply and PFC (Power Factor Correction).
  • Front-Panel Work Surface, LCD display.
  • Digital Signal Processing (DSP).
  • Integrated Networking.
  • Direct digital inputs run with the amp's 24-bit/96 kHz converters.
  • Industry's Highest Output Voltage.
  • Light Weight.

Global Power Supply with PFC
Crown's new I-Tech series comes in three versions, the I-T4000, I-T6000, and the I-T8000 - all related to the combined power output at 4 ohms. The amps feature a global power supply with power factor correction (PFC). The I-T6000's regulated switch-mode power supply delivers full power regardless of mains voltage: from 120 to 277 volts, and from 50 to 60 Hz. What this means is that the amp can be taken anywhere on the planet and function, 85V - 277V. If you are in North America with voltages running from 110V to 125V, or in Europe with voltages from 230V to 250V Crown's I-T8000 will work with out needing a separate step-up or down transformer. PFC technology allows the I-T6000 to draw current from the mains in a more controlled and efficient way than non-PFC amplifiers, providing massive amounts of power from a single 20 amp breaker.

Front-Panel Work Surface (LCD)
I-T6000's front panel controls are set around an LCD screen that is backlit with white LEDs. All control aspects of the I-T6000 can be accessed from the front panel, with a laptop needed only for DSP programming. Having a network of I-Techs connected to the laptop management software is an amazingly functional tool. I-T6000's front panel LCD screen provides two valuable benefits never before seen on a professional amplifier: fast and easy menu based setup and full amplifier diagnostics. Basic menu controls include Bridge, Y Input, Recall preset, LCD contrast, and Input sensitivity. Advanced menus include Attenuator limit, Attenuator link, Clip limiter, Output voltage limiter, Output power limiter, Pink noise generator, Monitor, Input, Max input, Power-up options, and more.

At the front of I-T6000 are the bridge mode, power and data indicators along with the "cool" green glowing (when power is present) power switch. Each channel has its virtual control knob (encoder), indicator lights, ready, signal, -20 dB, -10 dB being green with clip, thermal, and fault being red. For access to menu/DSP functions from the front panel there are menu/exit, next and previous buttons.

Integrated DSP
Crown engineers took advantage of the best-available technology and years of expertise to build a DSP section specific to I-Tech- one that performs with the audio quality you have come to expect from the best outboard analog signal processing components. The I-T6000's DSP has some truly innovative functions such as real time load monitoring, adjustable voltage gain, attenuators from 0 to 100 dB in 0.5 dB steps and error reporting for faults, thermal, voltage, or load monitoring problems. I-T6000's powerful DSP is also easy to set up, with your custom settings and factory-designed tunings easily loaded and recalled via onboard presets. By designing the DSP specific to I-Tech, with the latest technology and through careful attention to detail, Crown engineers designed a DSP section that achieves a level of accuracy and ease of use that is simply not possible with outboard DSP processors.

Integrated Networking
IQ Network provides the most powerful amplifier control and monitoring available, and it's tightly integrated into the I-T6000. I-Tech amps connect directly to IQ Networks, providing Crown's legendary IQ control over industry-standard Ethernet hardware. Using mature, off-the-shelf technology, Crown's TCP/IQTM protocol ensures reliable, easy to implement, and inexpensive network connectivity. Using the network, you can set every function of the I-T6000's DSP. Limiter settings alone involve clip, average power, and peak voltage. For creating speaker processing, you are given 64 assignable filters with nine different filter types and all forms of pass filters. Up to a two-second delay is also available per channel for time aligning components. These all can be compiled to up to 10 presets that are recallable from the front panel without using a laptop. So what does all this mean? Well, all you would ever need at front of house is a compressor/limiter (always for safety) and an EQ, no more crossover and speaker processing gear. If you have a digital console just a single cable to I-T6000. Sweet!

CobraNet digital audio options are available with Crown's proprietary "one-click" solution that integrates both TCP/IQ and CobraNet digital audio with a single network
connection.

AES/EBU Digital Inputs
Inputs to the I-T6000 are standard XLR as well as AES/EBU digital inputs. There is a link output as well for sending signal to other amps. I-T6000's outputs consist of Neutrik Speakon NL4s per channel with one NL4 taking both amp channel outputs down a single NL4. There are also five-way binding posts for each channel out. The direct digital inputs run with the amp's 24-bit/96 kHz converters. Frequency response is ±0.25 dB from 20 Hz to 20 kHz with the signal to noise ratio being >105dB Aweighted. The damping factor is an outstanding >5000 from 20 Hz to 100 Hz.

Industry's Highest Output Voltage
Today's high-performance loudspeakers need additional voltage drive to really come alive. The I-T6000 features the highest output-voltage capability of any professional amplifier. I-T6000's patented Interleave switch-mode design delivers a solid combination of high output power and a smaller, lighter weight package. Officially designated "Class-I," this break-through technology provides a clear advantage over conventional amplifier (Class-D) models by providing lower distortion, higher voltage, higher power, and greater reliability.

Digital Audio Inputs
(AES/EBU - CobraNetTM) I-T6000 features digital audio inputs for exceptional audio quality. With AES/EBU inputs (standard) or optional CobraNet version, I-T6000 provides your choice of today's most widely accepted digital audio formats.

Light Weight
The I-T6000 packs a lot of power in a small but rugged, 2U package. Weighing in at less than 28 lbs. (12.7 kg), The I-T6000 delivers unmatched power for its weight class, far outpacing the competition in watts/pound.

Conclusion
From the slightest nuances in the tremolo of a flute to the chest pounding bass of a rock 'n' roll kick drum to the harmonic rich vocals of a jazz singer, Crown delivers. Crown amplifiers are renowned for their ability to accurately amplify anything audio-with unmatched power and accuracy-night after night without fail.

Crown I-T6000 Applications:

  • Touring sound companies.
  • Contracting/Install.

Crown I-T6000 Power Output:
Stereo
8 Ohm: 1500W
4 Ohm: 3000W       
2 Ohm: 2500W       
       
Mono
8 Ohm: 6000W       
4 Ohm: 5000W

Crown I-T6000 Features:

  • Two-channel.
  • Level controls.
    Slot for Crown IQ module.
  • Compatible with Crown IQ system.
  • Cirrus Logic 24-bit / 96-kHz Delta-Sigma converters for extremely low noise and extended dynamic range.
  • Proprietary balanced Sallen and Key 3rd-order D/A output filter, tightly coupled to the Class-I output stage for improved signal-to-noise.
  • Latest 32-bit Sharc digital processors by Analog Devices.
  • Custom-designed, true studio-quality dynamics and frequency shaping filters.
  • Channel Indicators
  • For each channel, a column of LEDs indicate a full range of amplifier diagnostics and information, including Fault, Thermal, Ready, Clip, Signal Presence and Signal Level.
  • Intelligent LCD Screen and controls lets you adjust the amplifier's attenuation and muting, configure the amp, recall DSP presets, and set up and view error monitoring. The presets allow you to quickly reconfigure the amp for various applications.
  • Indicators: Power, Data and Bridge Mode.
  • Power Switch: Glows green when AC power is present at the power cord.
  • AC mains circuit breaker offers extra protection for the amplifier.
  • Balanced analog XLR inputs.
  • Balanced analog XLR daisy-chain outputs.
  • Input Ground Lift Switch.
  • AES/EBU Digital Input XLR Connector.
  • Active Link/Out Connector.
  • Accepts a connector from a TCP/IQ network cable.
  • LINK ACT indicator shows network activity.
  • 100 Mb indicator shows a 100 Mb network connection.
  • Preset indicator blinks to indicate active preset; count flashes to determine number.
  • IQ Data LED shows IQ link activity.
  • 4-Pole Speakon® Output Connectors: Accept 2-pole or 4-pole Speakon connectors.
  • 5-Way Binding Post Output Jacks: Accept banana plugs, spade lugs or bare wire.
  • Displays attenuation in dB and on a bar meter.
  • Peak Voltage Limiter sets output voltage limits, from
  • 0 to 200 VOLTSPK.
  • Pink Noise Generator: Adjust the noise level from 0 dB to -100 dB (off) in 0.5 dB steps.
  • Preset: DSP settings tailored for a specific application.
  • Monitor: Select thermal headroom, AC line voltage, load, error log, operating hours, amplifier firmware version, date code, or serial number.
  • I-Tech comes with JBL VerTec tunings preloaded into presets.
  • SHIPPING INFO: 24X24X10 38 LBS

Power Output

I-Tech Specifications
Power Output

Stereo

Mono

8 Ohm

4 Ohm

2 Ohm

8 Ohm

4 Ohm

I-T8000

2100W

4000W

3500W

8000W

7000W

I-T6000

1500W

3000W

2500W

6000W

5000W

I-T4000

1250W

2000W

1800W

4000W

3600W

Guaranteed minimum power output per channel, 20 Hz to 20 kHz, <0.35% true THD, both channels driven. Rated power not part-tolerance dependent.

I-Tech Frequently Asked Questions (FAQs)

Q. How can I-Tech produce so much power with only a 20A plug?
A.

The combination of Class-I technology and an innovative PFC power supply enables I-Tech to very efficiently draw power from the A/C mains and deliver it to the speakers. This high efficiency, coupled with a significant amount of energy storage, allows I-Tech to deliver high power much more effectively than conventional designs, and thus reduces the demands on the power cord.For more information, read this short "Tech Made Simple" article.Also, to see real current draw numbers for I-Tech, refer to the AC Power Draw and Thermal Dissipation sheets here

Q. Isn't Class-I just like other amplifier classes?
A.

No, Class -I amplifiers are a fundamentally different design from all other amplifier classes on the market. Crown has patented the technology behind Class-I amplifiers and is the only manufacturer in the world building this design. For more information about Class-I, read this technical paper.

Q. How does I-Tech recycle energy from the load?
A.

Class-I is unique in that it always provides an electrical path between the amplifier's output and power supply bulk capacitors. This means that when a loudspeaker sends energy back to an I-Tech amplifier it stores it in the power supply for later use. This keeps the output devices from dissipating the energy from the loudspeaker as heat and keeps the power supply from having to work as hard.

Q. Why is the 2 ohm power number smaller than the 4 ohm power number?
A.

The question may be better stated, "Why is the 4 ohm number so large?" The 4 Ohm number is so large because Class-I is not fundamentally voltage limited, unlike ALL other amplifier designs available on the market. Competitive amplifier designs require complicated multi-level (Class-H) supplies, which limit the voltage available to the output under low impedance loads. This multiple step supply topology lends itself to the typical power matrix. The down side of Class-H is that if the program material asks for a peak higher then the rail voltage limit the amplifier will distort. In other words, headroom is limited. Class-I does not exhibit this limitation. 200V is always available to all loads. As a result the amplifier is capable of producing very high music output peaks without distorting. Some view I-Tech's unconventional power matrix to indicate that I-Tech is not "good" or is "unstable" when driving low impedance loads. Nothing could be further from the truth. A fundamental advantage of Class-I is that it cares little about the load impedance. Pile on the speakers. I-Tech isn't afraid.

Q. How does Crown measure power?
A.

I-Tech output power is measured using the "Maximum Average Power" method. The Maximum Average Power test is designed to be an easy way to more closely approximate output power with real world musical sources. The test is simple: the amplifier is set up with the level controls turned to the maximum setting, and then a connected sine wave source is increased until the specified total harmonic distortion is reached.

Q. What are your 20Hz to 20kHz specs?
A.

All output power specs for I-Tech are provided at 20Hz to 20kHz.

Q. I heard that PFC could cause the mains to sag and shut the amplifier down. Will I-Techs PFC do that?
A.

No. I-Tech monitors the mains voltage and gently corrects for this rare phenomenon.

Q. Are you going to produce a lower-cost version of I-Tech?
A.

When compared to retail pricing of competitive amplifiers with similar specifications you will find that I-Tech is priced VERY competitively, and none of those competitive amplifiers have DSP, 200V rails, or global power supply with PFC.

Q. I don't want to use your DSP. Can I buy I-Tech without DSP?
A.

No. The DSP is an integral part of the I-Tech, not just bolt-on signal processing. By integrating the DSP into I-Tech, Crown engineers have been able to dramatically improve signal-to-noise, and use this integration to allow intelligent control of amplifier operation. 

Benefits of integrated DSP:
Greatly improved signal-to-noise, even when compared to amplifiers without dsp.
Gain staging is optimized and no longer a potential for operator error 
DSP has real-time knowledge of the amplifiers operation, which allows I-Tech to offer:
   Output voltage limiting
   Load monitoring
   Average output power limiting

Q. What kind of filters are available in I-Tech's DSP?
A.

There are 64 filters total within the I-Tech DSP and they can be placed anywhere 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 4 
Highpass:Bessel 2-4,Butterworth1-4,and Linkwitz-Riley 4 
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.

Q. How many filters are available in I-Tech's DSP?
A.

There 64 filters available in I-Techs DSP.

Q. How much delay is available in I-Tech's DSP?
A.

I-Tech has over 2 full seconds of delay available on each channel, adjustable in 20 microsecond increments.

Q. What are the adjustment increments for I-Tech's delay setting?
A.

One 48,000th of a second, or 0.02083 millisecond, or approximately 1/4" or about 1 centimeter.

Q. Will other signal processors work with I-Tech? I don't want to use the on board DSP.
A.

Yes, any outboard signal processing can be used with I-Tech. You must remember that all DSP has its own inherent latency and this must be considered when configuring delays.Note: As in all cases with any amplifier, make sure you re-check the EQ for the room every time the system is setup in a different location. 

Q. What is latency, and does I-Tech have a fixed latency?
A.

The latency of a device is the amount of time it takes a signal to travel from the device's input to its output. When using the analog inputs, latency has been measured at 1.13ms. The latency of the input/DSP section is fixed, and does not change whether using no processing or maximum- available processing. Latency with an AES/EBU input varies due to buffering of the signal that occurs before it is sent to the input/DSP stage, and is dependent upon the input AES/EBU data rate as shown below:
 

AES/EBU SAMPLE RATE

LATENCY

32 KHz

2.744 ms

44.1 KHz

2.358 ms

48 KHz

2.275 ms

96 KHz

1.807 ms

In addition to these sources of delay through the amplifier, there is the possibility of some minimal delay due to the wiring of the AES/EBU signal. The AES/EBU standard 110Ω cable has a delay of 6ns/meter. In addition, the I-Tech amplifier has a delay of ~85ns in its active digital loop-thru. To put this in perspective, a system with 50 meters of cable and sixteen amplifiers all looped through each other would have a delay at the last amplifier of 1.575us. This is equivalent to a delay of less than one-quarter inch. This additional source of delay will be inconsequential in almost all systems and can be ignored.

Q. If I use I-Tech and Macro-Tech to power a stack, do I have to worry about any delay or time alignment?
A.

There is a ~1 ms difference between I-Tech and Macro-Tech amplifiers, as well as any other Crown amplifier using the Grounded BridgeTM output design. See the previous FAQ for more about the I-Tech latency.

Q. Is post-processed audio available on the analog audio XLR outputs/loop through?
A.

No. Since all I-Tech amplifiers have DSP as standard, post-processed outputs are not necessary.

Q. I cannot find 26dB gain in the sensitivity menu. Is it available in I-Tech?
A.

Yes, many different sensitivities and gains are available depending on the setting of the max input level switch. Refer to the I-Tech Application Guide for a complete list of all 149 sensitivity / gain settings.  To set the I-Tech amp for 26dB gain, change the max input level switch to 20dBu using IQwic or the front panel display. Upon returning to the sensitivity menu you can set the gain to 26dB.

Q. What is an attenuator limiter?
A.

An attenuator limiter is a control set via the front panel display or through IQwic software that places a limit or lock on the attenuator at a user defined level keeping curious hands from turning the input attenuator beyond your desired level.

Q. How do I set the power limiters?
A.

Via either the front panel LCD or IQwic software.

Q. Why did you put an LCD on the front?
A.

To provide real-time diagnostics: thermal headroom, load monitoring, etc. 
To provide much of the IQ Network capabilities without the need to set up a network. 
To make monitoring all this information easy.

Q. Do I have to use the LCD?
A.

No. The amplifier was designed for simple plug-and-play operation, and can be quickly setup as though it were a traditional amplifier.

Q. How can I keep unauthorized people from tampering with my settings?
A.

Controls can be fully locked out through front panel LCD or through higher levels of security using IQwic software.

Q. I don't know anything about networking. Can I get I-Tech's networking up and running quickly without reading a book or taking a class?
A.

In IQWic version 7, a network wizard is included under the Setup Menu to assist in the process of setting up your network. The software looks at your computer and configures the address of the amplifier to be on the same network. In many cases, this is all that is required to set up your IQ Network.

Q. What happens if the network breaks or goes down?
A.

Network communication will stop, but the amplifier will continue to operate as last programmed.

Q. Why didnt you use the Ethercon connector for the network connection?
A.

The EtherCon connector does not provide noise filtering as the one used in I-Tech does. Also, the connector used will generally not be changed often as the use of rack mounted network switches will minimize cable changing.

Q. What happens if the amp loses digital signal?
A.

The analog connections can be configured as backup and the amplifier will switch to those connections automatically.

Q. Are there filters available for the air inlets?
A.

Yes, two sets are included with the amplifier.

Q. Are the air filters required? How often should I change them?
A.

Although the amplifier is shipped with air filters, they are not required. If you use the air filters, you should clean or change them frequently depending on the dust level of the environment where they are used. The dust should not be allowed to block the airflow into the amplifier.

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