Crown Audio I-T4000 - Manual

Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com
I-T4000
The power amplifi er shall be a solid-state two-channel model employing
Class I (BCA
®
) output circuitry.
The amplifi er shall contain protection from shorted, open and mismatched
loads, general overheating, DC, high-frequency overloads, under/over volt-
age, and internal faults.
If an amplifi er channel starts to overheat, the Thermal Level Control (TLC)
circuit shall engage that channel’s input compressor in an amount propor-
tional to the amount of overheating, in order to generate less heat. If the
channel becomes too hot for safe operation, the channel shall shut off,
and the Thermal Indicator for that channel shall illuminate brightly to alert
the user that a state of thermal stress or overload has caused the channel
to shut down.
The front-panel controls shall be a power switch, Menu/Exit button, Previ-
ous button, Next button, Encoder 1 knob and Encoder 2 knob (Channel
Level Controls).
Rear-mounted controls shall include a reset switch for the circuit breaker.
The recommended load impedance in Dual mode shall be 1/2/4/8/16 ohms.
The load impedance in Bridge-Mono mode shall be 2/4/8/ ohms. The
amplifi er shall be safe when driving any kind of load, including highly
reactive ones.
The rear-mounted output connectors shall be two high-current, 50A Neutrik
Speakon NL4MLP (mates with NL4FC or NL4)(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
connectors, and one XLR active/re-clocked AES/EBU digital loop through
connector.
The rear-mounted input connectors shall be a 3-pin female XLR analog
input connector for each channel, and a 3-pin female XLR digital input
connector that accepts a digital signal in the AES/EBU format.
The rear-mounted Ethernet connector accepts an RJ-45 connector for
HiQnet™ or TCP/IQ™ networking and optional CobraNet™ transport from
a standard network cable. Built into the connector shall be a yellow LINK
ACTIVITY indicator that shows network activity, and a green 100Mb indica-
tor that shows a 100Mb network connection.
The rear-mounted Data indicator shall be a yellow LED that indicates con-
trol data activity. The rear-mounted Preset indicator shall be a yellow LED
that fl ashes to signal the number of the current preset if active.
The I-T4000 shall be fully compatible with Harman Pro System Archi-
tect and the Crown
® IQ System ® and HiQnet or TCP/IQ networks. The
I-T4000CN shall be compatible with CobraNet networks.
Front panel indicators shall include an LCD Control Screen with white LED
backlight to control the amplifi er’s setup and operation, a yellow Bridge-
Mode Indicator that illuminates when the amplifi er is set to Bridge-Mono
mode, a green Ready Indicator (one per channel) that illuminates when the
channel is initialized and ready to produce audio output and is off when
the ampliifer is in standby mode via the control software, a green Signal
Indicator (one per channel) that illuminates to indicate the presence of
input signals above –40 dBu, a red Clip Indicator that illuminates when
the THD of the channel’s output signal reaches the onset of audible clip-
ping (and illuminates during Thermal Level Control (TLC) limiting, a red
Thermal Indicator (one per channel) that illuminates when the channel has
shut down due to thermal stress or overload, a red Fault Indicator (one
per channel) that fl ashes when the amplifi er output channel has stopped
operating, a yellow Data Indicator that fl ashes during network data activity,
I-T4000
6/05 137252-1E
© 2005 Crown Audio ® , Inc.
Specifi cations subject to change without prior notice. Latest
information available at www.crownaudio.com.
Crown, Crown Audio, BCA, and IQ System are registered trade-
marks of Crown International. HiQnet is a trademark of Harman
International Industries, Inc. Printed in U.S.A.
Architectural & Engineering Specifi cations
I - T E C H S E R I E S
a blue Power Indicator that illuminates when the amplifi er has been turned
on and AC power is available (and fl ashes when the AC line voltage is 15%
above or below the nominal rated value), and a green AC Mains Present
Indicator in the power switch that indicates AC power is present at the
power cord.
The amplifi er shall include onboard DSP with 24-bit conversion and 32-bit
fl oating-point processing, DSP presets in fi rmware and downloadable, load
supervision, error reporting, and a global power supply with Power Factor
Correction.
The power amplifi er shall meet or exceed the following performance crite-
ria. Input sensitivity for rated output: adjustable in 0.1V steps from 1.4V to
7.75V. Voltage gain: 37.1 dB to 22.2 dB. Rated output with both channels
driven in Dual mode with 0.35% THD (20 Hz to 20 kHz): 1800 watts per
channel into 2 ohms, 2000 watts per channel into 4 ohms, and 1250 watts
per channel into 8 ohms. Rated output in Bridge-Mono mode with both
channels driven at 0.35% THD (20 Hz to 20 kHz): 3600 watts into 4 ohms
and 4000 watts into 8 ohms. Frequency Response at 1 watt, 20 Hz to
20 kHz: ±0.25 dB. Signal to Noise Ratio below rated power, A-weighted:
greater than 105 dB. Total Harmonic Distortion at full rated power: less
than 0.35%. Intermodulation Distortion (60 Hz and 7 kHz at 4:1, from full
rated output to –35 dB): less than 0.35%. Damping Factor (20 Hz to 100
Hz): greater than 5000. Crosstalk (below rated power, 20 Hz to 1 kHz):
greater than 80 dB. Common Mode Rejection (20 Hz to 1 kHz): greater
than 50 dB. DC Output Offset: less than ±3 mV. Input Impedance (nominal):
20 kilohms balanced, 10 kilohms unbalanced. Maximum Input Level: +15
dBu or +21 dBu, depending on input sensitivity. Latency (analog, digital
inputs): 1.13 mS analog, 1.81 mS digital (96 kHz).
The amplifi er chassis shall be constructed of aluminum with a durable
silver fi nish and shall be designed for dual-zone, microprocessor con-
trolled, continuously variable-speed forced-air ventilation from the front
panel to the back panel.
The dimensions of the amplifi er shall allow for 19 inch (48.3 cm) EIA
standard (RS-310-B) rack mounting. The amplifi er shall be 3.5 inches
(8.9 cm) tall, and 16.2 inches (41.1 cm) deep behind the rack-mounting
surface.
The amplifi er shall weigh 28 pounds (10.5 kg).
The amplifi er shall be designated the Crown I-T4000.