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Operation Manual
CTs Multi-Channel Power Amplifiers
page 16
Wall-Mount level control panels for use with
VCA module:
1-VCAP: See Figure 5.5. Used in conjunction with
a VCA-MC module, this is a single-gang panel pro-
viding remote volume control for one or more CTs
amplifier channels. The potentiometer on the panel
is wired directly to one of the VCA connectors on
the VCA-MC.
4-VCAP: See Figure 5.6 This is a two-gang panel
providing remote volume control for four or more
CTs amplifier channels. The potentiometers on the
panel are wired directly to the respective VCA con-
nector on the VCA-MC.
Refer to the VCA-MC Operation Manual for wiring
of the single or multiple channel level control.
Your amplifier may have come with an IQ-MC or
VCA-MC module already factory-installed, or your
choice of MC modules can be easily added to the
amplifier by any authorized Crown Service Center.
Contact Crown Technical Support for more details.
Choosing the Right Module
To order accessory modules for your amplifier,
please refer to the model tag (located on the back
panel of the amplifier) for your amplifier’s specific
model number. Then refer to the chart below to
select the correct accessory for your requirements.
1-VCAP: Single-gang wall-mount panel with
one VCA channel volume control (for any CTs
model)
4-VCAP: Two-gang wall-mount panel with
four VCA channel volume controls (for any CTs
model)
5.3.2 Input Sensitivity
The CTs 4200 and CTs 8200 have a fixed input sen-
sitivity of 1.4V. A service option is available for
other input sensitivities.
MC MODULE VCA MODULE
CTs 4200 IQ-MC4 VCA-MC4
CTs 4200A IQ-MC4A VCA-MC4A
CTs 8200 IQ-MC8 VCA-MC8
Figure 5.3 IQ-MC8 Module
Figure 5.5 1-VCAP Module
5 Advanced Features
and Options
Figure 5.4 VCA-MC8 Module
Figure 5.6 4-VCAP Module
5.3 Options
Below are some available options. For current
options, visit the Crown website at www.crownau-
dio.com.
5.3.1 Control Modules
IQ-MC (IQ Module): See Figure 5.3. A single IQ-
MC module provides IQ control and monitoring
capability to all channels of the amplifier. Features
include basic IQ amplifier control and monitoring,
including attenuation, mute, polarity, input level,
output level, power supply temperature, and thermal
level meters. Advanced features include IOC, Ther-
mal and Fault error reporting, Load Supervision,
output limiting, Listen Bus, AUX control port,10
presets, and real-time “read-only” software indica-
tion of amplifier hardware indicator, level control,
and mode switch status.
VCA-MC (VCA module): See Figure 5.4. Pro-
vides independent remote level control for each
channel. 4-pin removable Phoenix-style barrier
connectors provide the +10VDC control voltage,
ground, and control lines for two amplifier chan-
nels. Thus, 4-channel amplifiers use two connec-
tors; 8-channel amplifiers use four connectors.