Crown CL-1 Brochure
C O N T R A C T O R S E R I E S
CL1
Architectural & Engineering Specifications
CL1 (120V, 60 Hz models)
The amplifier shall be a solid-state two-channel model. Each amplifier
channel shall have the ability to operate individually, or paired with the
other channel in a bridged configuration to provide increased output volt
age over that of an individual channel output.
Front panel controls shall include a rocker switch for selecting power on
and off. Rear panel controls shall include a recessed detented rotary control
for each channel to adjust input level, a recessed switch to select Stereo
or Bridge modes of operation, and a reset switch for the AC mains circuit
breaker.
Internal controls shall include a jumper block to allow selection of input
sensitivity of either 0.775V or 26 dB gain as a service option. Sensitivity
shall be factory-set to 1.4V.
Front panel indicators shall include a green LED to indicate that the amplifier is turned on and power is applied; a red LED for each channel which
shall blink to indicate any of the following 5 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 the amplifier wires
develop a short circuit, and 5) should the amplifier output stage become
non-operational; a red LED for each channel which shall turn on to indicate
when distortion of any type becomes audible in the amplifier output; and
a green LED for each channel which shall flash dimly to indicate when a
low-level signal (> -40 dBm) is present at the input of the amplifier.
Rear-panel connectors shall include a combination XLR and ¼-in (6.35 cm)
phone connector in parallel with a three-terminal barrier block for each
channel for balanced input connection (on the standard input module);
a four-terminal touch-proof barrier block for output connection (on the
standard output module); and an RJ11 jack for connection to an external
circuit for the purpose of remotely monitoring fault conditions.
The amplifier power requirements shall be 120 VAC, 6.3 A at 60 Hz. A
detatchable IEC 15A to NEMA 5-15P AC line cord shall be provided for AC
connection. Typical quiescent power draw shall be 60 watts.
The amplifier chassis shall be constructed of steel with a durable black
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finish. The amplifier shall employ a cooling system consisting of internal
heat exchangers, along with a variable-speed cooling fan which shall operate according to internal thermal demand. Airflow through the chassis shall
be from front to rear.
The dimensions of the amplifier shall allow for 19 inch (48.3 cm) EIA Stan
dard (RS-310-B) rack mounting. The amplifier shall be 5.25 inches (13.34
cm) tall and 12.25 inches (31.11 cm) deep behind the rack-mounting
surface. The amplifier shall weigh 32.6 pounds (14.79 kg).
The amplifier shall be protected against shorted, open or mismatched
loads; overloaded power supplies; excessive temperature; chain destruction phenomena; input overload damage; and high-frequency blowups.
The amplifier shall protect loudspeakers from input/output DC, large or
dangerous DC offsets and turn-on/turn-off transients.
Input Impedance of the amplifier shall be nominally 20 k ohms, balanced;
nominally 10 k ohms, unbalanced.
The power amplifier shall meet or exceed the following performance criteria
(amplifier in stereo mode with 8 ohm loads and an input sensitivity of
26 dB gain, 1 kHz at rated power unless otherwise specified): Load imped
ance (safe with all types of loads): 2, 4 & 8 ohm Stereo; 4, 8 & 16 ohm
Bridge. Voltage gain, 1 kHz, 1.4V sensitivity: 30.5 dB at 4/8 ohm. Output
Power at 1 kHz at rated THD; in Stereo mode at 8 ohms: 275 watts per
channel; in Stereo mode at 4 ohms: 450 watts per channel; in Stereo mode
at 2 ohms: 560 watts per channel; in Bridge mode at 8 ohms: 900 watts;
in Bridge mode at 4 ohms: 1,100 watts. Frequency Response, 20 Hz to 20
kHz at 1 watt: ±0.1 dB. Phase Response: ±15 degrees deviation from linear
phase from 20 Hz to 20 kHz at 1 watt. Signal to Noise Ratio, A-Weighted:
Better than 105 dB below rated 1-kHz power. Total Harmonic Distortion
(THD), 1 kHz at rated power: 0.5% or less true THD from 20 Hz to 20 kHz.
Intermodulation Distortion (60 Hz and 7 kHz at 4:1): Less than 0.1% at
rated power to 30 dB below rated power at 8 ohms. Damping Factor (8
ohm): Better than 400 from 10 Hz to 400 Hz. Crosstalk, 20 Hz to 20 kHz:
Better than 50 dB below rated power. Common Mode Rejection (CMR):
Better than 40 dB from 20 Hz to 1 kHz. DC Output Offset (Shorted Input):
±10 mV.
The amplifier shall be designated the Crown CL1.
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Crown Audio, Inc.
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com
Specifications subject to change without prior notice. Latest
information available at www.crownaudio.com.
®
Crown
is a registered trademark of Crown International, Inc.
Printed in U.S.A.
© 2003 Crown Audio, Inc.
7/03 131956-1A
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