Crown 1160ma User Guide
page 5
CH and CL Series Power Amplifiers
Operation Manual
1 Welcome
Congratulations on your purchase of a Crown
®
CH or CL Series commercial power amplifier.
The CH and CL Series is a complete family of
amplifiers with a wide range of power output
capabilities and output configurations.
The CH and CL Series is a complete family of
amplifiers with a wide range of power output
capabilities and output configurations.
CH Series amplifiers can directly drive “con-
stant voltage” lines, so you can avoid the
expense of adding step-up transformers for
distributed loudspeaker systems. CL Series
amplifiers offer low-impedance compatibility
for applications where high-power, low-imped-
ance loads are the primary requirement.
stant voltage” lines, so you can avoid the
expense of adding step-up transformers for
distributed loudspeaker systems. CL Series
amplifiers offer low-impedance compatibility
for applications where high-power, low-imped-
ance loads are the primary requirement.
All CH and CL Series amplifiers feature
Crown’s exclusive SST (System Solutions
Topologies) expansion system. The SST expan-
sion system makes it easy to tailor your ampli-
fier to a specific application or to add future
technology as it develops (see Section 4.3.2 for
descriptions of available SSTs).
Crown’s exclusive SST (System Solutions
Topologies) expansion system. The SST expan-
sion system makes it easy to tailor your ampli-
fier to a specific application or to add future
technology as it develops (see Section 4.3.2 for
descriptions of available SSTs).
Modern power amplifiers are sophisticated
pieces of engineering capable of producing
extremely high power levels. They must be
treated with respect and correctly installed if
they are to provide the many years of reliable
service for which they were designed.
pieces of engineering capable of producing
extremely high power levels. They must be
treated with respect and correctly installed if
they are to provide the many years of reliable
service for which they were designed.
In addition, CH and CL Series amplifiers
include a number of features which require
some explanation before they can be used to
their maximum advantage.
include a number of features which require
some explanation before they can be used to
their maximum advantage.
Please take the time to study this manual so
that you can obtain the best possible service
from your amplifier.
that you can obtain the best possible service
from your amplifier.
1.1 Features
•
The CH and CL Series amplifiers are
designed specially for fixed installation,
and include the following features:
and include the following features:
•
CH Series provides for both low imped-
ance and high impedance loads, with the
choice of 4/8 ohm or 70V operation for
each channel. The output mode of each
channel can be set independently, allowing
unique or mismatched loads to be driven
by each channel.
choice of 4/8 ohm or 70V operation for
each channel. The output mode of each
channel can be set independently, allowing
unique or mismatched loads to be driven
by each channel.
•
CH Series includes a 70-Hz high-pass fil-
ter for each channel (when used in 70V
mode) providing necessary low-frequency
roll-off to eliminate saturation of constant
voltage step-down transformers typically
used in 70V distributed systems.
mode) providing necessary low-frequency
roll-off to eliminate saturation of constant
voltage step-down transformers typically
used in 70V distributed systems.
•
CL Series includes high power 2-ohm
operation, for jobs where low impedance is
the only requirement.
operation, for jobs where low impedance is
the only requirement.
•
A red five-way Fault LED for each channel
blinks during amplifier power-up, and
upon the following fault conditions: exces-
sive heatsink temperature; transformer
thermal protection; short at amplifier out-
put; output stage non-operational.
blinks during amplifier power-up, and
upon the following fault conditions: exces-
sive heatsink temperature; transformer
thermal protection; short at amplifier out-
put; output stage non-operational.
•
An RJ11 connector allows external circuits
to monitor the status of the Fault circuit.
to monitor the status of the Fault circuit.
•
Detented level controls are located on the
back panel for security, and allow for accu-
rate level settings.
back panel for security, and allow for accu-
rate level settings.
•
Barrier strip output connectors allow for
quick easy connection regardless of the
load, and accept up to 10 AWG crimp-on
terminal forks.
quick easy connection regardless of the
load, and accept up to 10 AWG crimp-on
terminal forks.
•
SST modules provide flexible input
options, such as onboard crossover con-
figurations.
options, such as onboard crossover con-
figurations.
•
Stereo/Bridge switch allows conversion
from Stereo mode to Bridge mode for
higher-powered single-channel operation.
from Stereo mode to Bridge mode for
higher-powered single-channel operation.
•
Advanced protection circuitry guards
against: shorted outputs, open circuits,
against: shorted outputs, open circuits,
DC, mismatched loads, general overheat-
ing, high frequency overloads and internal
faults.
ing, high frequency overloads and internal
faults.
•
Three Year, No-Fault, Fully-Transferable
Warranty completely protects your invest-
ment and guarantees its specifications.
Warranty completely protects your invest-
ment and guarantees its specifications.
1.2 How to Use This Manual
This manual provides you with the necessary
information to safely and correctly setup and
operate your amplifier. It does not cover every
aspect of installation, setup or operation that
might occur under every condition. For addi-
tional information, please consult Crown’s
Amplifier Application Guide (available online at
www.crownaudio.com), Crown Technical Sup-
port, your system installer or retailer.
information to safely and correctly setup and
operate your amplifier. It does not cover every
aspect of installation, setup or operation that
might occur under every condition. For addi-
tional information, please consult Crown’s
Amplifier Application Guide (available online at
www.crownaudio.com), Crown Technical Sup-
port, your system installer or retailer.
We strongly recommend you read all instruc-
tions, warnings and cautions contained in this
manual. Also, for your protection, please send
in your warranty registration card today. And
save your bill of sale — it’s your official proof
of purchase.
tions, warnings and cautions contained in this
manual. Also, for your protection, please send
in your warranty registration card today. And
save your bill of sale — it’s your official proof
of purchase.
Output Power
Output Power at 1 kHz at rated THD; Stereo mode, per channel with both channels driven.
STEREO MODE BRIDGE MODE
2 Ohms
4 Ohms
8 Ohms
70V
4 Ohms 8 Ohms
140V
CH1 450W 275W 300W
900W 600W
CH2 660W
400W
600W
1320W 1200W
CH4
1400W
1200W 600W 1200W
2400W 2400W
CL1 560W 450W 275W
1100W
900W
CL2 975W 660W 400W
1950W
1320W
CL4 1800W*
1200W 600W
3600W*
2400W
*
≥ 200VAC Line Voltage
2800W
Output Power
Output Power at 1 kHz at rated THD; Stereo mode, per channel with both channels driven.
STEREO MODE
BRIDGE MODE