Load Impedance: Safe with all types of loads. Rated
for 4 and 8 ohms in Stereo mode, 4 ohms in Bridge-Mono mode.
Voltage Gain to 1-kHz, 8-ohm rated output,
- 30.5-dB gain at 1.4-volt sensitivity;
- 26-dB gain at 2.34-volt sensitivity.
- Required AC Mains: 50/60 Hz (North American units are 60 Hz only); 100, 120 and 230-240 VAC (10%) units are available.
Power Draw At Idle: 90 watts
AC Line Connector: NEMA 5-15P (15 A).
Performance
- Frequency Response: 0.2 dB from 20 Hz to 20 kHz at 1 watt.
- Phase Response: 15 degrees from 20 Hz to 20 kHz at 1 watt.
- Signal to Noise Ratio (below rated power) 20 Hz to 20 kHz: >100 dB.
- Total Harmonic Distortion (THD): 1-kHz rated power, 0.5% or less true THD from 20 Hz to 20 kHz.
- Intermodulation Distortion (IMD): (60 Hz and 7 kHz at 4:1) Less than 0.1% at rated power to 35 dB below rated power at 8 ohms.
- Damping Factor: Greater than 400 from 10 Hz to 400 Hz.
- Crosstalk: Better than 55 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
- Level: A 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 two-position switch
located on the back panel next to the Mode switch. Switchable between 1.4
volts for full output into an 8-ohm load (default setting), or a fixed
voltage gain of 26 dB.
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.
- Fault: 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 Combo connector for
each channel which features a balanced -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 Impedance: Nominally 20 k ohms, balanced. Nominally 10 k ohms, unbalanced.
- Input Sensitivity: 1.4 volts for standard
1-kHz power, or fixed 26-dB gain. 0.775-volt sensitivity available (call
Crown Technical Support).
Output
- Output Connectors: Two Neutrik Speakon NL4MP output connectors
(mates with NL4FC). Options for current CE models:
CEAS1 barrier block module or CEAS2 5-way binding post module, both in
parallel with Speakon connectors.
- DC Output Offset: 10 millivolts.
Output Signal
- Stereo: Unbalanced, two-channel:
- Bridge-Mono:
Balanced, single-channel. Channel 1 controls are active; Channel 2 should be turned down.
Protection: CE Series 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: Proportional speed fan.
Dimensions: EIA Standard 19-inch rack mount
width (EIA RS-310-B), 5.25-inch (13.34-cm) height and 12.25-inch
(31.11-cm) depth behind front mounting surface.
