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What makes a great amplifier?

T he world has seen many good amplifiers, but fewachieve greatness. What sets these elite few apart

from all the others? The answer is simple: A careful synthesis of unrivaled sonic performance combined with rock-solid dependability.

While the definition of a great amplifier may be simple,delivering on those requirements is not. This is what has always set Crown® amplifiers apart from the others:Crown delivers.

From the slightest nuances in the tremolo of a flute to the chest pounding bass of a rock ’n’ roll kickdrum to the harmonic rich vocals of a jazzsinger, Crown delivers. Crown amplifiersare renowned for their ability to accuratelyamplify anything audio—with unmatchedpower and accuracy—night after nightwithout fail.

For decades, the formula for creatinggreat amplifiers has been the same atCrown: An insightful combination ofgenetics, breakthrough technologies,craftsmanship, and passion. This formula,proven over and over, has produced a lineageof great amplifiers: DC-300, PSA-2, Micro-Tech®,Macro-Tech®, Studio ReferenceTM, K, and CTs: Eachamplifier great in its time, and each raising the standardfor high performance. Once again, this formula forgreatness has delivered on its promise: I-Tech, theworld’s next great amplifier, and the pinnacle of Crown’s50-year history of innovation.

The following pages convey with words and pictures the essence of I-Tech and why it is destined to be thegreatest amplifier ever. But words and pictures cannotconvey what can only be experienced. We challenge you to read on, arrange for a demonstra-tion, and prepare to have yourexpectations for a great ampli-fier redefined.

GENETICS. The wealth of experience, knowledge and history that are the essential foundation for all Crown amplifiers.

For decades, Crown has developed industry-defining amplifiers for professional audio. Each new generation of Crown amplifiers has leveraged the technological advances that made its predecessors great, then improved upon them. This is what continues to enable Crown to create great amplifiers,and it is the very DNA of I-Tech.

BREAKTHROUGH TECHNOLOGIES.Revolutionary technological advances, not justclever marketing spin.

Building on a legacy of more than 20 U.S.patents for innovative circuitry (far more than any other amplifier manufacturer), Crown

continues to lead the way with I-Tech. I-Tech willredefine your expectations for high performance,

incorporating more breakthrough technologies per cubic inch than any other amplifier, ever.

CRAFTSMANSHIP.Producing the world’sgreatest amplifiers withpride and commitmentto quality.

From the careful selection of chassismaterials and construc-tion processes, to theadoption of the latest in x-rayand photo-robotic circuit board testing, each I-Tech amplifier

is painstakingly crafted to perform to the highest standards.

PASSION. Being deeply committed to delivering the most moving and powerful performances

audiences can experience.

Our passion is fueled by the knowledge that we are a partner to every performer, consultant, contractor, and sound engineer that uses Crown products. We support them in delivering exceptional audio to audiences all over the world.


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The anatomy of I-Tech. Built from the inside out to deliver.

1 Class-I - Interleave Technology

I-Tech’s patented Interleave switch-modedesign delivers a solid combination of high output power and a smaller, lighter weightpackage. Officially designated “Class-I,” thisbreak-through technology provides a clearadvantage over conventional amplifier (ClassD) models by providing lower distortion, highervoltage, higher power, and greater reliability.

2 Industry’s Highest Output Voltage

Today’s high-performance loudspeakers needadditional voltage drive to really come alive. I-Tech features the highest output-voltagecapability of any professional amplifier.

3 Regulated Switch-Mode Power Supply

An all-new, ground-breaking power supplyforms the heart of the I-Tech Series. Crown’sregulated switch-mode power supply deliversfull power regardless of mains voltage: from120 to 277 volts, and from 50 to 60 Hz.

4 PFC (Power Factor Correction)

Crown’s innovative PFC technology allows I-Tech to draw current from the mains in amore controlled and efficient way than non-PFC amplifiers, providing massive amountsof power from a single 20 amp breaker.

5 Digital Audio Inputs (AES/EBU - CobraNetTM)

I-Tech amplifiers feature digital audio inputsfor exceptional audio quality. With AES/EBUinputs (standard) or optional CobraNet inputon CN models (coming soon), I-Tech providesyour choice of today’s most widely accepteddigital audio formats.

6 Light Weight

I-Tech packs a lot of power in a small butrugged, 2U package. Weighing in at less than28 lbs. (12.7 kg), I-Tech delivers unmatchedpower for its weight class, far outpacing thecompetition in watts/pound.


The features you want. The power you need.

Power SwitchGlows green whenAC power is presentat the power cord.

Channel IndicatorsFor each channel, a column of LEDsindicate a full range of amplifier diag-nostics and information, including Fault,Thermal, Ready, Clip, Signal Presenceand Signal Level.

Intelligent LCD Screen and ControlsLets you adjust the amplifier’s attenuationand muting, configure the amp, recall DSPpresets, and set up and view error monitor-ing. The presets allow you to quickly recon-figure the amp for various applications.

IndicatorsPower, Data and BridgeMode.

AC Mains Circuit BreakerOffers extra protection for the amplifier.

Analog Inputs Section• Balanced Analog

XLR Inputs.• Balanced Analog XLR

Daisy-chain Outputs.• Input Ground Lift Switch.

Digital Inputs Section• AES/EBU Digital Input

XLR Connector.• Active Link/Out

Connector.

Networking SectionAccepts a connector from a TCP/IQ network cable.• LINK ACT indicator

shows network activity.• 100 Mb indicator shows

a 100 Mb networkconnection.

• Preset indicator blinks to indicate active preset; count flashes to determine number.

• IQ Data LED shows IQ link activity.

Outputs Section• 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.Patented Class-I switching output • Highest output voltage available

Lightweight 2U package • Global regulated power supplyPower Factor Correction (PFC) • Studio-grade DSP inside

Direct digital audio inputs • 24-bit / 96-kHz converters Integrated networking • Intuitive LCD display

Rugged chassis design

POWER OUTPUTSTEREO MONO

8 Ohm 4 Ohm 2 Ohm 8 Ohm 4 Ohm

I-T8000 2100 W 4000 W 3500 W 8000 W 7000 WI-T6000 1500 W 3000 W 2500 W 6000 W 5000 WI-T4000 1250 W 2000 W 1800 W 4000 W 3600 W

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


Integrated Networking

IQ® Network provides the most powerful amplifier control and monitoring available, and it’s tightly integrated into I-Tech. 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.

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

I-Tech puts you in the digital domain...

Attenuation: Displays attenua-tion in dB and on a bar meter.

Example Basic Controls

CH1 Input Sensitivity: Sets theinput sensitivity of Channel 1.

Preset: DSP settings tailored fora specific application.*

Peak Voltage Limiter: Sets outputvoltage limits, from 0 to 200 VOLTSPK.

Example Advanced Controls

Pink Noise Generator: Adjust thenoise level from 0 dB to -100 dB(off) in 0.5 dB steps.

Monitor: Select thermal head-room, AC line voltage, load, errorlog, operating hours, amplifierfirmware version, date code, orserial number.

I-Tech’s front panel LCD screen provides two valuable benefitsnever before seen on a professional amplifier: fast and easymenu-based setup and full amplifier diagnostics.

Basic menu controls include Bridge, Y Input, Recall preset, LCDcontrast, and Input sensitivity. Advanced menus includeAttenuator limit, Attenuator link, Clip limiter, Output voltage lim-iter, Output power limiter, Pink noise generator, Monitor, Input,Max input, Power-up options, and more.

Intelligent Front Panel LCD

*I-Tech comes with JBL VerTec tunings preloaded into presets.

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 qualityyou have come to expect from the best outboard analog signal processing components. I-Tech’s powerful DSP is also easy to set up, with your custom settings and factory-designed tunings easily loaded and recalledvia onboard presets. By designing the DSP specific to I-Tech, withthe latest technology and through careful attention to detail, Crownengineers designed a DSP section that achieves a level of accura-cy and ease of use that is simply not possible with outboard DSPprocessors.

FeaturesCirrus Logic 24-bit / 96-kHz Delta-Sigma converters forextremely 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 improvedsignal-to-noise.Latest 32-bit Sharc digital processors by Analog Devices.Custom-designed, true studio-quality dynamics andfrequency-shaping filters.

With integrated networking and DSP, plus intelligent LCD screen.


www.crownaudio.comP.O. BOX 1000 · ELKHART, IN 46515-1000 U.S.A.PHONE 574.294.8200 · FAX 574.294.8329

SPECIFICATIONS

PerformanceMinimum Guaranteed Power:See power grid.

Frequency Response (at 1 watt, 20 Hz - 20 kHz): ±0.25dB.

Signal to Noise Ratio below ratedpower, A-weighted: >105 dB

Total Harmonic Distortion (THD)at full rated power: < 0.35%.

Intermodulation Distortion (IMD)60 Hz and 7 kHz at 4:1, from fullrated output to –35 dB: < 0.35%.

Damping Factor(20 Hz to 100 Hz): > 5000.

Crosstalk (below rated power, 20 Hz to 1 kHz): > 80 dB.

Common Mode Rejection(CMR) (20 Hz to 1 kHz): > 50 dB.

DC Output Offset: < ± 3 mV.

Input Impedance (nominal): 20 kilohms balanced,10 kilohms unbalanced.

Maximum Input Level: +15dBu or +22 dBu, depending on input sensitivity.

Latency (analog, digital inputs): 1.13 mS analog, 1.81 mS digital (96 kHz).

A/D, D/A Converters: 24-bit 96 kHzCirrus Logic.

Digital Input: AES/EBU, 16-24 bit,32-48 kHz. Onboard sample rateconverter.

Network: Onboard TCP/IQ, compati-ble with standard 100 Mb Ethernethardware.

DSP: 24-bit conversion with 32-bit,floating-point DSP processing. Has64 assignable filters with 9 differentfilter types. Includes all-pass filters,over 2 seconds of delay availableper channel, and dual uncorrelated-noise and sine-wave generators.

Load Supervision: Monitors theaverage impedance on the output of the amplifier. If the impedancefalls outside the specified high/lowlimits, this function alerts the user via the front panel display, and viathe IQwic™ software when amp is on an IQ Network.

Error Reporting: Reports clip errors,thermal errors, fault conditions andload monitoring errors for each chan-nel via the front panel display and viaIQwic software when amp is on anIQ Network.

Attenuators: Speed sensitive, con-tinuously variable rotary encoder, 0.5dB steps, range 0 to –90 dB.

Load Impedance(Note: Safe with all types of loads):Stereo: 1/2/4/8/16 ohms. Bridge Mono: 2/4/8 ohms.

Input Sensitivity (referenced to 8ohm rated output): Adjustable in0.1V steps from 1.4V to 7.75V.

AC Line Connector: Five cordsetssupplied with amplifier (USA, UK,European, Australia, India).

Voltage Gain(referenced to 8 ohm rated output): I-T4000: 37.1 dB to 22.2 dBI-T6000: 37.9 dB to 23.0 dBI-T8000: 39.3 dB to 24.5 dB

Required AC Mains: Universal ACinput, 100-240VAC, 50/60 Hz (±15%).Maximum AC mains voltage 277VAC.

Front Panel Controls and IndicatorsBridge Mode Indicator: Yellow LEDilluminates when the LCD controlscreen is set to Bridge-Mono mode.

Ready Indicator: Green LED, oneper channel, illuminates when thechannel is initialized and readyto produce audio output. Indicator isoff when the amplifier is in standbymode via the IQ system.

Signal Indicators: Three greenLEDs per channel indicate the ampli-fier’s input and output signal levels.

Signal: input signal is above –40 dBu.–20 dB: amplifier output is 20 dBbelow clipping.–10 dB: amplifier output is 10 dBbelow clipping.

Clip Indicator: Red LED, one perchannel, illuminates when the chan-nel’s output signal reaches the onsetof audible clipping. The Clip Indicatoralso will illuminate during ThermalLevel Control (TLC) limiting or whenthe input compressor/limiter is protect-ing the amplifier from input overload.

Thermal Indicator: Red LED, oneper channel, illuminates when thechannel has shut down, or is verynear shutting down, due to thermalstress or overload.

Fault Indicator: Red LED, one perchannel, flashes when the amplifieroutput channel has stopped operating.

Data Indicator: Yellow LED indicatesIQ Network data activity. Data indica-tor flashes only when the amplifier is polled for data, or is polled to seewhether it is online.

Power Indicator: Blue LED indicatesamplifier has been turned on and ACpower is available. The LED will flashwhen the AC line voltage is 15%above or below the nominal ratedvalue.

AC Mains Present Indicator: Greenindicator built into power switch indi-cates AC power present at the powercord and the amplifier circuit brakeris in the “on” position.

LCD Control Screen and Controls:These let the user adjust the amplifi-er’s attenuation and muting, config-

ure the amp, set up error monitoring(such as temperature and loadsupervision), and recall DSP presets.The presets allow the user to quicklyreconfigure the amp for variousapplictions.

LCD Control Screen: Integrated LCDwith white LED backlight, controlsamplifier setup and operation.

Normal mode: Attenuation in 0.5 dBsteps, Mute/Unmute, Front PanelLockout.

Basic Menu: LCD Contrast, CH1Sensitivity, CH2 Sensitivity, SpeakerPreset, Dual/Bridge mode, Input Y.

Advanced Features Menu: AttenuatorLimits, Attenuator Link, Clip Limiter,Peak Voltage Limiter, Average PowerLimiter, Pink Noise Generator,AES/EBU Input Trim, Input Source,Maximum Analog Input, AmplifierLabel Edit, CH1 Label Edit, CH2 Label Edit.

Menu/Exit Button: “Menu” enters themain menu. “Exit” gets out of theMenu.

Next Button: Selects the next item inthe Menu.

Prev Button: Selects the previousitem in the Menu.

Level Controls (Encoders): Thesetwo knobs affect the Channel-1 andChannel-2 output levels. They alsoselect Menu items and adjustparameter values that are displayedon the LCD Control Screen.

Power Switch: Push-on/push-offswitch with built-in green AC mainspresent indicator.

Back Panel Controls,Indicators and ConnectorsPower Cord Connector: Standard20 amp IEC inlet. Voltage range isindicated above IEC inlet.

Reset Switch/Circuit Breaker: If thecurrent draw of the amplifier exceedssafe limits, this braker automaticallydisconnects the power supply fromthe AC mains. The switch resets thecircuit braker.

Output Connectors: Two high-cur-rent, 50A Neutrik® Speakon®

NL4MLP (mates with NL4FC), oneper channel. Two pairs of high-cur-rent, 60A color-coded 5-way binding

posts (for banana plugs,spade lugs or bare wire). Twomale XLR passive analogloop through. XLR active/re-clocked AES/EBU digital loop through.

Analog Input Connectors: A3-pin female XLR connectorfor each channel.

Digital Input Connector: A3-pin female XLR connector

that accepts a digital signal in theAES/EBU format.

Ground Lift Switch: Isolates inputground from AC ground.

Ethernet Connector: This connectoraccepts an RJ-45 connector for IQTCP/IQ networking from a standardnetwork cable. Built into the connec-tor is a yellow LINK ACT indicatorthat shows network activity, and agreen 100Mb indicator that shows a100Mb network connection.

Data Indicator: Yellow LED indicatesIQ Network data activity. Data indica-tor flashes only when the amplifier ispolled for data, or is polled to see whether it is online.

Preset Indicator: Yellow LED flashesto signal the number of the currentpreset if active.

ConstructionCooling: Dual-zone, microprocessorcontrolled, continuously variablespeed fans, front-to-back airflow.

Front Panel: Cast aluminum withintegrated handles.

Dimensions: 19 in. (48.3 cm) W x 3.5in. (8.9 cm) H x 16.2 in. (41.1 cm) D.

Weight: 28 lbs (12.7 kg) net, 36 lbs(16.3 kg) shipping.

Included Accessories: Rear rackears with integral EZ-Rack Pin, rackscrews, operation manual, powercords, foam air filter.

POWER OUTPUTSTEREO MONO

8 Ohm 4 Ohm 2 Ohm 8 Ohm 4 Ohm

I-T8000 2100 W 4000 W 3500 W 8000 W 7000 WI-T6000 1500 W 3000 W 2500 W 6000 W 5000 W I-T4000 1250 W 2000 W 1800 W 4000 W 3600 W

TRADEMARKS NOTICE: Crown, Crown Audio, BCA, IQ, IQ System, Macro-Tech and Micro-Tech are registered trademarks; Studio Reference, IQwicand TCP/IQ are trademarks of Crown International.Neutrik, Speakon, CobraNet and JBL are used for information only and arethe property of their respective companies.

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

Crown Audio®, Inc. reserves the right to make changes in specifications, software, orproducts without prior notice. Crown Audio, Inc. also assumes no responsibility for anyerror in type or print reproduction of the features or specifications in this literature.

©2004 Crown Audio, Inc. 137231-3 4-04.


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