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What makes a great amplifier?
he world has seen many good amplifiers, but few
T
achieve 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
Crown delivers.
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.
For decades, the formula for creating
great amplifiers has been the same at
Crown: An insightful combination of
genetics, breakthrough technologies,
craftsmanship, and passion. This formula,
proven over and over, has produced a lineage
of great amplifiers: DC-300, PSA-2, Micro-Tech
Macro-Tech
amplifier great in its time, and each raising the standard
for high performance. Once again, this formula for
greatness has delivered on its promise: I-Tech, the
world’s next great amplifier, and the pinnacle of Crown’s
50-year history of innovation.
The following pages convey with words and pictures
the essence of I-Tech and why it is destined to be the
greatest amplifier ever. But words and pictures cannot
convey what can only be experienced. We challenge
you to read on, arrange for a demonstration, and prepare to have your
expectations for a great amplifier redefined.
®
, Studio ReferenceTM, K, and CTs: Each
®
amplifiers apart from the others:
®
,
GENETICS. The wealth of
experience, knowledge and history
that are the essential foundation for
all Crown amplifiers.
For decades, Crown has developed industrydefining 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 just
clever 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 will
redefine your expectations for high performance,
incorporating more breakthrough technologies
per cubic inch than any other amplifier, ever.
CRAFTSMANSHIP.
Producing the world’s
greatest amplifiers with
pride and commitment
to quality.
From the careful
selection of chassis
materials and construction processes, to the
adoption of the latest in x-ray
and 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.
2
1
Built from the inside out to deliver.
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1 Class-I - Interleave Technology
I-Tech’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.
2 Industry’s Highest Output Voltage
Today’s high-performance loudspeakers need
additional voltage drive to really come alive.
I-Tech features the highest output-voltage
capability of any professional amplifier.
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3 Regulated Switch-Mode Power Supply
An all-new, ground-breaking power supply
forms the heart of the I-Tech Series. Crown’s
regulated switch-mode power supply delivers
full power regardless of mains voltage: from
120 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 a
more controlled and efficient way than nonPFC amplifiers, providing massive amounts
of power from a single 20 amp breaker.
4
5 Digital Audio Inputs
(AES/EBU - CobraNetTM)
I-Tech amplifiers feature digital audio inputs
for exceptional audio quality. With AES/EBU
inputs (standard) or optional CobraNet input
on CN models (coming soon), I-Tech provides
your choice of today’s most widely accepted
digital audio formats.
6 Light Weight
I-Tech packs a lot of power in a small but
rugged, 2U package. Weighing in at less than
28 lbs. (12.7 kg), I-Tech delivers unmatched
power for its weight class, far outpacing the
competition in watts/pound.
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The features you want.
The power you need.
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.
AC Mains
Circuit Breaker
Offers extra protection
for the amplifier.
Patented Class-I switching output • Highest output voltage available
Lightweight 2U package • Global regulated power supply
Power Factor Correction (PFC) • Studio-grade DSP inside
Direct digital audio inputs • 24-bit / 96-kHz converters
Integrated networking • Intuitive LCD display
Analog Inputs Section
• Balanced Analog
XLR Inputs.
• Balanced Analog XLR
Daisy-chain Outputs.
• Input Ground Lift Switch.
Rugged chassis design
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.
Digital Inputs Section
• AES/EBU Digital Input
XLR Connector.
• Active Link/Out
Connector.
Indicators
Power, Data
and Bridge
Mode.
Networking Section
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.
Power Switch
Glows green when
AC power is present
at the power cord.
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.
®
I-T8000 2100 W 4000 W 3500 W 8000 W 7000 W
I-T6000 1500 W 3000 W 2500 W 6000 W 5000 W
I-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.
POWER OUTPUT
STEREO MONO
8 Ohm 4 Ohm 2 Ohm 8 Ohm 4 Ohm
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I-Tech puts you in the digital domain...
With integrated networking and DSP, plus intelligent LCD screen.
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/IQTMprotocol 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 digital
audio with a single network connection.
Intelligent Front Panel LCD
I-Tech’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.
Example Basic Controls
Attenuation: Displays attenua-
tion in dB and on a bar meter.
CH1 Input Sensitivity: Sets the
input sensitivity of Channel 1.
Example Advanced Controls
Peak Voltage Limiter: Sets output
voltage limits, from 0 to 200 VOLTS
Pink Noise Generator: Adjust the
noise level from 0 dB to -100 dB
(off) in 0.5 dB steps.
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.
I-Tech’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.
Features
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
.
PK
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.
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.
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SPECIFICATIONS
Performance
Minimum Guaranteed Power:
See power grid.
Frequency Response (at 1 watt,
20 Hz - 20 kHz): ±0.25dB.
Signal to Noise Ratio below rated
power, 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 full
rated 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: +15
dBu 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 kHz
Cirrus Logic.
Digital Input: AES/EBU, 16-24 bit,
32-48 kHz. Onboard sample rate
converter.
Network: Onboard TCP/IQ, compatible with standard 100 Mb Ethernet
hardware.
DSP: 24-bit conversion with 32-bit,
floating-point DSP processing. Has
64 assignable filters with 9 different
filter types. Includes all-pass filters,
over 2 seconds of delay available
per channel, and dual uncorrelatednoise and sine-wave generators.
Load Supervision: Monitors the
average impedance on the output
of the amplifier. If the impedance
falls outside the specified high/low
limits, this function alerts the user
via the front panel display, and via
the IQwic™ software when amp is
on an IQ Network.
Error Reporting: Reports clip errors,
thermal errors, fault conditions and
load monitoring errors for each channel via the front panel display and via
IQwic software when amp is on an
IQ Network.
Attenuators: Speed sensitive, continuously variable rotary encoder, 0.5
dB 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 8
ohm rated output): Adjustable in
0.1V steps from 1.4V to 7.75V.
AC Line Connector: Five cordsets
supplied with amplifier (USA, UK,
European, Australia, India).
Voltage Gain
(referenced to 8 ohm rated output):
I-T4000: 37.1 dB to 22.2 dB
I-T6000: 37.9 dB to 23.0 dB
I-T8000: 39.3 dB to 24.5 dB
Required AC Mains: Universal AC
input, 100-240VAC, 50/60 Hz (±15%).
Maximum AC mains voltage 277VAC.
Data Indicator: Yellow LED indicates
IQ Network data activity. Data indicator flashes only when the amplifier
is polled for data, or is polled to see
whether it is online.
Power Indicator: Blue LED indicates
amplifier has been turned on and AC
power is available. The LED will flash
when the AC line voltage is 15%
above or below the nominal rated
value.
AC Mains Present Indicator: Green
indicator built into power switch indicates AC power present at the power
cord and the amplifier circuit braker
is in the “on” position.
LCD Control Screen and Controls:
These let the user adjust the amplifier’s attenuation and muting, config-
Power Switch: Push-on/push-off
switch with built-in green AC mains
present indicator.
Back Panel Controls,
Indicators and Connectors
Power Cord Connector: Standard
20 amp IEC inlet. Voltage range is
indicated above IEC inlet.
Reset Switch/Circuit Breaker: If the
current draw of the amplifier exceeds
safe limits, this braker automatically
disconnects the power supply from
the AC mains. The switch resets the
circuit braker.
Output Connectors: Two high-current, 50A Neutrik
NL4MLP (mates with NL4FC), one
per channel. Two pairs of high-current, 60A color-coded 5-way binding
POWER OUTPUT
STEREO MONO
8 Ohm 4 Ohm 2 Ohm 8 Ohm 4 Ohm
I-T8000 2100 W 4000 W 3500 W 8000 W 7000 W
I-T6000 1500 W 3000 W 2500 W 6000 W 5000 W
I-T4000 1250 W 2000 W 1800 W 4000 W 3600 W
Guaranteed minimum power output per channel, 20 Hz to 20 kHz, <0.35% true THD, both channels driven. Rated power not part-tolerance dependent.
Front Panel Controls
and Indicators
Bridge Mode Indicator: Yellow LED
illuminates when the LCD control
screen is set to Bridge-Mono mode.
Ready Indicator: Green LED, one
per channel, illuminates when the
channel is initialized and ready
to produce audio output. Indicator is
off when the amplifier is in standby
mode via the IQ system.
Signal Indicators: Three green
LEDs per channel indicate the amplifier’s input and output signal levels.
Signal: input signal is above –40 dBu.
–20 dB: amplifier output is 20 dB
below clipping.
–10 dB: amplifier output is 10 dB
below clipping.
Clip Indicator: Red LED, one per
channel, illuminates when the channel’s output signal reaches the onset
of audible clipping. The Clip Indicator
also will illuminate during Thermal
Level Control (TLC) limiting or when
the input compressor/limiter is protecting the amplifier from input overload.
Thermal Indicator: Red LED, one
per channel, illuminates when the
channel has shut down, or is very
near shutting down, due to thermal
stress or overload.
Fault Indicator: Red LED, one per
channel, flashes when the amplifier
output channel has stopped operating.
ure the amp, set up error monitoring
(such as temperature and load
supervision), and recall DSP presets.
The presets allow the user to quickly
reconfigure the amp for various
applictions.
LCD Control Screen: Integrated LCD
with white LED backlight, controls
amplifier setup and operation.
Normal mode: Attenuation in 0.5 dB
steps, Mute/Unmute, Front Panel
Lockout.
Basic Menu: LCD Contrast, CH1
Sensitivity, CH2 Sensitivity, Speaker
Preset, Dual/Bridge mode, Input Y.
Advanced Features Menu: Attenuator
Limits, Attenuator Link, Clip Limiter,
Peak Voltage Limiter, Average Power
Limiter, Pink Noise Generator,
AES/EBU Input Trim, Input Source,
Maximum Analog Input, Amplifier
Label Edit, CH1 Label
Edit, CH2 Label Edit.
Menu/Exit Button: “Menu” enters the
main menu. “Exit” gets out of the
Menu.
Next Button: Selects the next item in
the Menu.
Prev Button: Selects the previous
item in the Menu.
Level Controls (Encoders): These
two knobs affect the Channel-1 and
Channel-2 output levels. They also
select Menu items and adjust
parameter values that are displayed
on the LCD Control Screen.
that accepts a digital signal in the
AES/EBU format.
Ground Lift Switch: Isolates input
ground from AC ground.
Ethernet Connector: This connector
accepts an RJ-45 connector for IQ
TCP/IQ networking from a standard
network cable. Built into the connector is a yellow LINK ACT indicator
that shows network activity, and a
green 100Mb indicator that shows a
100Mb network connection.
Data Indicator: Yellow LED indicates
IQ Network data activity. Data indicator flashes only when the amplifier is
polled for data, or is polled to see
whether it is online.
Preset Indicator: Yellow LED flashes
to signal the number of the current
preset if active.
Construction
Cooling: Dual-zone, microprocessor
controlled, continuously variable
speed fans, front-to-back airflow.
Front Panel: Cast aluminum with
integrated handles.
Dimensions: 19 in. (48.3 cm) W x 3.5
in. (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 rack
ears with integral EZ-Rack Pin, rack
screws, operation manual, power
cords, foam air filter.
®
posts (for banana plugs,
spade lugs or bare wire). Two
male XLR passive analog
loop through. XLR active/reclocked AES/EBU digital
loop through.
Analog Input Connectors: A
3-pin female XLR connector
for each channel.
Digital Input Connector: A
3-pin female XLR connector
Speakon
®
TRADEMARKS NOTICE: Crown, Crown Audio, BCA, IQ, IQ System, MacroTech and Micro-Tech are registered trademarks; Studio Reference, IQwic
and TCP/IQ are trademarks of Crown International.
Neutrik, Speakon, CobraNet and JBL are used for information only and are
the property of their respective companies.
Crown Audio®, Inc. reserves the right to make changes in specifications, software, or
products without prior notice. Crown Audio, Inc. also assumes no responsibility for any
error in type or print reproduction of the features or specifications in this literature.
©2004 Crown Audio, Inc.
137231-3 4-04.
www.crownaudio.com
P.O. BOX 1000 · ELKHART, IN 46515-1000 U.S.A.
PHONE 574.294.8200 · FAX 574.294.8329
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