Crown ce 4000, Руководство по обслуживанию

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Specifi cations 2-1
130485-1 Rev. B
CE 4000 Service Manual
©2002 Crown Audio, Inc.
2 Specifi cations
Note: All measurements are in Stereo mode with 8-ohm loads and an input sensitivity of
26-dB gain at 1-kHz rated power unless otherwise specifi ed.
Power
Output Power:
Total Harmonic Distortion (THD): 1-kHz rated
power, 0.5% or less THD.
Intermodulation Distortion (IMD): (60 Hz and 7 kHz
at 4:1) Less than 0.5% at rated power to 30 dB below
rated power at 8 ohms.
Damping Factor: Greater than 700 from 10 Hz to
400 Hz.**
Crosstalk: Better than 50 dB below rated power,
20 Hz to 20 kHz.
Common Mode Rejection (CMR): Better than 70 dB
from 20 Hz to 1 kHz.
DC Output Offset (Shorted Input): ±10 mV.
Controls & Connectors
Level: A 31-step detented rotary level control for
each channel located on the front panel.
Power: An on/off rocker switch located on the front
panel.
Mode: Turn power off before switching. A two-position
switch located on the back panel below the input
connectors which, when turned to stereo, operates
the amplifi er as two independent channels. When
“Bridge-Mono” mode is selected, the amplifier
bridges the two output channels for twice the output
voltage.
Sensitivity: A three-position switch located on the
back panel next to the Mode switch. Switchable
among 0.775 volts or 1.4 volts for full output into an
8-ohm load (default setting), or 3.46 volts for a fi xed
voltage gain of 26 dB.
Fault Jack: A back-panel RJ-11 jack that may be
remotely monitored to signal amplifi er Fault condition.
An LED or other signalling device (not supplied)
may be used.
Filter Switches:
Low Pass: A three-position switch for each channel
located on the back panel below the input and output
modules. Switchable among settings for Flat, 80 Hz
and100 Hz. Filter rolloff is 24-dB per octave.
High Pass: A four-position switch for each channel
located on the back panel below the input and output
modules. Switchable among settings for Flat, 30 Hz,
40 Hz and 50 Hz. Filter rolloff is 18-dB per octave.
Indicators
Signal: A green LED for each channel which fl ashes
when a very low-level signal (>–40 dBm) is present
at input. May be used for troubleshooting cable
runs.
Clip: A red LED for each channel which turns on
when distortion becomes audible in the amplifi er
output.
* Per EN 55103-1: 1996 Annex B and Annex F. Highest reading from
a sample of 10 random readings.
** Measured using binding-post output connectors.
1800W
1
1200W
600W
3600W
2400W
2 ohm Dual
8 ohm Bridge-Mono
4 ohm Bridge-Mono
8 ohm Dual
4 ohm Dual
CE 4000 Power Chart
Maximum power @ 1 kHz
with 0.5% THD
Load Impedance: Safe with all types of loads. Rated
for 2, 4 and 8 ohms in Stereo mode, 4 and 8 ohms
in Bridge-Mono mode.
Voltage Gain to 1-kHz, 8-ohm rated output:
39.0-dB gain at 0.775-volt sensitivity;
33.8-dB gain at 1.4-volt sensitivity;
26-dB gain at 3.46-volt sensitivity.
Required AC Mains: 50/60Hz,100-240VAC (±10%).
AC Line Current,
100 Volts: 8.5 A;
120 Volts: 7.1 A;
230-240 Volts: 3.7 A;
At Idle: Amp draws no more than 155 watts.
AC Line Connector: 15A IEC Connector with
Country
Specifi c Cord and Plug.
Inrush Current*: 50.86 A.
Performance
Frequency Response: ±0.25 dB from 20 Hz to 20
kHz at 1 watt (See Figure 2.1).
Phase Response: ±15 degrees deviation from linear
phase from 20 Hz to 20 kHz at 1 watt.
Signal to Noise Ratio, A-Weighted, 20 Hz to 20 kHz:
Better than 100 dB below rated 1-kHz power;