Specifications
INSTALLED SOUND
• 11
A
s part of the Contractor (CH/CL) Series, Crown provides three models
(CL1, CL2 and CL4) that offer low-impedance compatibility for applications
where high-power, low-impedance loads are the primary requirement. The CL
Series models provide 2-, 4-, and 8-ohm options per channel. Rear-panel level
controls for secure operation and precision detented level controls allow for
accurate level settings in many fixed installation applications. Active crossover
with signal routing available with optional System Solution Topology modules
(SST-SBSC and ScreenArray SSTs).
`SPECIFICATIONS
Power
Load Impedance: Safe with all types of loads.
All models: 2, 4 and 8 ohm Stereo; 4, 8 and 16
ohm Bridge.
Voltage Gain, 1 kHz, 1.4V sensitivity,
CL1: 30.5 dB at 4/8 ohm.
CL2: 32.1 dB at 4/8 ohm.
CL4: 34 dB at 4/8 ohm.
AC Line Requirements: North American CL1 and
CL2 units are 100 volts or 120 volts, 60 Hz only.
All other models 230-240 volts are 50/60 Hz.
Voltages are ±10%.
AC Line Current (no signal),
CL1: 100 Volts: 7.6 A; 120 Volts: 6.3 A;
230-240 Volts: 3.5 A.
CL2: 100 Volts: 11.4 A; 120 Volts: 9.5 A;
230-240 Volts: 5.0 A.
CL4: 100 Volts: 8.5 A; 120 Volts: 7.1 A;
230-240 Volts: 3.7 A.
AC Line Connector: Detachable 15A IEC connector
with country-specific plug.
Performance
Frequency Response, 22 Hz to 20 kHz at 1 watt,
CL1, CL2: ±0.1 dB.
CL4: ±0.25 dB.
Phase Response: ±15 degrees from 10 Hz to 20
kHz at 1 watt.
Signal to Noise Ratio, A-Weighted:
CL1, CL2: Better than 105 dB below rated
1-kHz power.
CL4: Better than 102 dB below rated 1-kHz power.
Total Harmonic Distortion (THD), at rated power:
0.5% or less.
Intermodulation Distortion (60 Hz and 7 kHz at 4:1):
CL1, CL2: Less than 0.1% at rated power to 30 dB
below rated power at 8 ohms.
CL4: Less than 0.5% at rated power to 30 dB
below rated power at 8 ohms.
Damping Factor (8 ohm):
CL1, CL2: Better than 600 from 10 Hz to 400 Hz.
CL4: Better than 1000 from 10 Hz to 400 Hz.
Crosstalk, 20 Hz to 20 kHz:
CL1, CL2: Better than 50 dB below rated power.
CL4: Better than 50 dB below rated power at 10 kHz.
Common Mode Rejection (CMR): Better than
40 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 rear panel.
Power: An on/off rocker switch located on
the front panel.
Mode: Two-position switch. “Stereo” operates the
amplifier as two independent channels. “Bridge”
bridges the two output channels for twice the out-
put voltage.
Indicators
Signal: A green indicator 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 indicator for each channel which turns
on when distortion becomes audible in the ampli-
fier output.
Fault: A red indicator for each channel which indi-
cates amplifier has muted output. Normally off.
Status may be monitored remotely by plugging into
back-panel RJ11 Fault jack.
Power: A blue indicator 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 (balanced ¼-
inch [6.35-mm] phone jack and 3-pin female XLR
connector, in parallel with a barrier strip termination).
Input Stage: Electronically balanced with precision
1% resistors.
Input Impedance: Nominally 20 k ohms balanced.
Nominally 10 k ohms unbalanced.
Input Sensitivity: Channel independent. Factory set
at 1.4 volts for standard 1-kHz, 8-ohm power. 26-
dB gain and 0.775-volt sensitivity available as a
Service Option.
Output Connectors: All models. Four-terminal
touch-proof barrier block.
Output Signal,
Stereo: Unbalanced, two-channel.
Bridge-Mono: Balanced, single-channel. Channel 1
controls are active; Channel 2 should be turned
down.
Protection
Protected against shorted, open or mismatched
loads; overloaded power supplies; excessive tem-
perature, chain destruction phenomena, input over-
load 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, coated with environmental-
ly friendly powder for long life and ease of main-
tenance.
Cooling: Proportional speed fan.
Dimensions
Width (all models): EIA Standard 19-inch rack
mount (EIA RS-310-B);
Height (all models): 5.25-inch (13.34-cm);
Depth (behind front mounting surface):
CL1, CL2: 12.25-inch (31.11-cm);
CL4: 16.25-inch (36.56-cm).
Weight
CL1: 32.6 pounds (14.78 kg);
CL2: 40.3 pounds (18.28 kg);
CL4: 33.3 pounds (15.1 kg).
For shipping weight, add 6 pounds (2.7 kg) to each
amplifier’s weight.
System Solutions
SST Modules: SST-SBSC: variable Linkwitz-Riley
stereo crossover with mono-summed sub-bass
outputs;
ScreenArray SST modules.
Regulatory Certifications
Other Applications
Note: All measurements apply to all models of CH
series amplifiers in stereo mode with 8-ohm loads and
an input sensitivity of 26-dB gain, 1-kHz at rated power
unless other otherwise specified. Specifications for
units supplied outside the U.S.A. may vary slightly at
different AC voltages and frequencies.
CL1 & CL2