Crown Itech Amplifiers

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

Signal to Noise Ratio below rated 8-ohm power, A-weighted:
>105 dB

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

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

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. Optional CobraNet input coming soon.

Network: Onboard TCP/IQ, compatible with standard 100-Mb Ethernet hardware.

DSP: 24-bit conversion with 32-bit, floating-point DSP processing. Bypass mode available. 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 –100 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: Adjustable in 0.1V steps from 1.4V to 9.7V.

Voltage Gain (referenced to 8 ohm rated output):
I-T4000: 37.0 dB to 20.3 dB
I-T6000: 37.9 dB tp 21.0 dB
I-T8000: 39.3 dB to 22.5 dB 

Required AC Mains: Universal AC input, 100-240 VAC, 50/60 Hz (±15%).

Maximum AC mains voltage: 277 VAC.

AC Line Connector: Five cordsets supplied with amplifier (USA, UK, Europe, Australia, India).

Front Panel Controls and Indicators

Bridge Mode Indicator: Yellow LED
illuminates when the amplifier 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.

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.

Data Indicator: Yellow LED indicates IQ Network data activity

Power Indicator: Blue LED indicates amplifier has been turned on and AC power is available.

AC Mains Present Indicator: Green indicator built into power switch indicates AC power is present at the power cord and the amplifier circuit breaker is in the "on" position.

Glowing Blue 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 applications.

   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 Menu screen. “Exit” leaves 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.

Back Panel Controls, Indicators and Connectors

Power Cord Connector: Standard 20 amp IEC inlet.

Switch/Circuit Breaker: Resets the circuit breaker that protects the power supply.

Output Connectors: Two high-current, 50A Neutrik® Speakon® NL4MLP (mates with NL4FC or NLT4FX), 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.

Ethernet Connector: This connector accepts an RJ45 connector for IQ TCP/IQ networking and optional CobraNet transport from a standard network cable. Built into the connector is a yellow LINK ACT indicator that shows network activity, and a green 100 Mb indicator that shows a 100 Mb network connection.

Data Indicator: Yellow LED indicates IQ Network data activity.

Preset Indicator: Yellow LED indicates that a preset is in use.

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.