Crown Audio DC-300A Stereo Amplifier User Manual

Crown I-Tech Series offers amazing power, light weight and ease
use for touring sound and installed sound applications. Onboard
a wide array of signal processing, greatly reducing the
need for rack components and rack wiring. Onboard DSP features 24bit, 96 kHz A/D and D/A converters.
All models are compatible with the IQ® Network and TCP/IQ™
networking. Digital audio and IQ control signals connect to the amp
via a single cable (in CobraNet™-ready models). 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.
Power Output*
Global Power Supply works anywhere in the world.
High power density, up to 8000 watts in a 2U chassis.
Highest output voltage in the industry (200V peak)
provides clean transient peaks.
Onboard DSP with 24-bit, 96 kHz Cirrus Logic A/D
and D/A converters.
Comprehensive array of indicators provide accurate
diagnostics: Power, Data, Bridge, along with Ready,
Signal, Clip, Thermal and Fault for each channel.
Front-panel control screen with advanced diagnostics and
status information. All controls are set from the front panel.
AES/EBU digital audio input. Ethernet connector accepts
standard network cables for TCP/IQ networking. CobraNet
input available in optional CN models (coming soon).
Analog and digital thru connectors.
(per channel)
(per channel)
(per channel)
2000W 1250W
3000W 1500W
4000W 2100W
Guaranteed minimum power output per channel, 20 Hz to 20 kHz, <0.35%
true THD, both channels driven. Rated power not part-tolerance dependent.
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.
Front Panel Controls and Indicators
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,
2.36 mS digital (44.1 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
uncorrelated-noise 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).
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
Fault Indicator: Red LED, one per channel, flashes
when the amplifier output channel has stopped
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,
configure 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.
Crown’s Three-Year, No-Fault, Fully Transferable Warranty
Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown amplifier—
an unsurpassed industry standard. With this unprecedented No-Fault protection, your new Crown
amplifier is warranted to meet or exceed original specifications for the first three years of
ownership. During this time, if your amplifier fails, or does not perform to original specifications,
it will be repaired or replaced at our expense. About the only things not covered by this warranty
are those losses normally covered by insurance and those caused by intentional abuse. And the
coverage is transferable, should you sell your amplifier.
See your authorized Crown dealer for full warranty disclosure and details. For customers outside of the
USA, please contact your authorized Crown distributor for warranty information or call 574-294-8200.
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.
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®
Speakon® NL4MLP (mates with NL4FC), one per
channel. Two pairs of high-current, 60A color-coded
5-way binding posts (for banana plugs, spade lugs
or bare wire). Two male XLR passive analog loop
through. XLR active/re-clocked 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
that accepts a digital signal in the AES/EBU format.
Ground Lift Switch: Isolates input ground from AC
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
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.
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.
Crown International
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: 574-294-8200
FAX: 574-294-8FAX
Specifications subject to change without prior notice. Latest information available
Crown, Crown Audio and IQ are registered trademarks; TCP/IQ and IQwic are trademarks
of Crown International. Other trademarks are the property of their respective owners.
Printed in U.S.A.
© 2004 Crown Audio®, Inc.
137444-1 4/04