Power
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:
50/60 Hz, 100-240VAC (±10%).
AC Line Current,
100 Volts: 100
Volts: 8.5 A;
120 Volts: 7.1 A;
230-240 Volts: 3.7 A;
At Idle: Amp draws no more than 140 watts.
AC Line Connector: 15A IEC Connector with
Country Specific Cord and Plug.
Performance
Frequency Response: ±0.25
dB from 20 Hz to 20 kHz at 1 watt.
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 102 dB below rated 1-kHz power;
Total Harmonic Distortion
(THD):
1-kHz rated power, 0.5% or less THD from 20 Hz to 20 kHz.
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 amplifier 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 fixed voltage gain of 26 dB.
Fault Jack: A back-panel RJ-11 jack that may
be remotely monitored to signal amplifier Fault condition. An LED or
other signaling 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 and 100 Hz. Filter roll-off 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 roll-off is 18-dB per octave.
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Indicators
Signal: A green LED for each channel
which flashes 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 amplifier output.
Normally off, this red indicator will blink under five different
conditions:
1. When the amplifier is
first powered up, until the unit is ready for operation
2. If the heatsinks reach a temperature above normal working
limits.
3. If the transformer thermal protection circuit is activated.
4. If amplifier output wires develop a short-circuit.
5. Should the amplifier output stage become non-operational.
This circuit may be monitored
remotely by plugging a simple switching circuit using an LED or other
signaling device into the back-panel RJ-11 (Fault) jack. Under some
conditions, the output of the amplifier will be muted.
Power: A green LED that
turns on when the amplifier has been turned on and has power.
Input/Output
Input Connector (standard module): One Neutrik(R)
Combo connector for each channel which features a balanced 1/4-inch
(6.35-mm) phone jack and a 3-pin female XLR connector, in parallel with
a barrier strip termination.
Input Stage: Input is electronically balanced
and employs precision 1% resistors.
Input Sensitivity: 0.775 volts or 1.4 volts
for standard 1-kHz power, or fixed 26-dB gain.
Output Connectors: Three options available: Four (4) Neutrik
Speakon(R)
NL4MP (mates with NL4FC)output connectors; two (2) 5-way binding posts
in parallel with two (2) Speakon connectors; or barrier strip outputs in
parallel with two (2) 5-way binding posts.
Output Signal,
Stereo: Unbalanced, two-channel;
Bridge-Mono: Balanced, single-channel. Channel 1 controls are
active; Channel 2 should be turned down.
Protection
CE 4000 amplifiers are protected against
shorted, open or mismatched loads; overloaded power supplies; excessive
temperature, chain destruction phenomena, input overload damage and
high-frequency blowups. They also protect loudspeakers from input/output
DC, large or dangerous DC offsets and turn-on/turn-off transients.
Construction
Rugged steel chassis is formed into a durable package any
stagehand could love. Coated with environmentally friendly powder for
long life and ease of maintenance.
Cooling:Three-speed proportional speed fan.
Dimensions: EIA Standard
19-inch rack mount width (EIA RS-310-B), 5.25-inch (13.34-cm) height and
16.25-inch (36.56-cm) depth with additional 1-inch rear rack ears.
Weight: The CE 4000 net weight is 33.3 pounds
(15.1 kg). Shipping weight is 39.3 pounds.
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