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CTs Multi-Channel Power Amplifiers
Operation Manual
4.3 Back Panel Controls
and Connectors
Note: CTs 8200 is shown. Some CTs
4200 features are in different locations.
K. AC Power Cord Connector
Standard IEC type 320 inlet.
120V models: 15-amp.
220-240V models: 10-amp.
Voltage is indicated above IEC inlet.
L. Output Connectors
One four-pole terminal strip for every two chan-
nels with touch-proof cover. Accepts up to 10
AWG terminal forks. To connect outputs, first
remove the touch-proof cover plate covering
the terminal strip by removing the screw which
holds it in place.
M. Accessory Panel
CTs 4200: Accepts an optional IQ-MC4A or
VCA-MC4A module.
CTs 8200: Accepts an optional IQ-MC8 or
VCA-MC8 module (explained in Section 5.3.1,
Control Modules).
N. Channel Level Controls
One 21-position detented rotary potentiometer
per channel, ranging from infinity (-70 dB) to
0 dB attenuation. Refer to Section 5.2.4 for pre-
cise dB attenuation increments for each detent.
O. Input Connectors
Removable Phoenix-style barrier connectors
for balanced input.
P. Mode Switch
Used on each consecutive pair of channels, this
four-position switch is used to select the ampli-
fier’s mode of operation: Dual 8/4 ohms,
Dual 70V, Bridge-Mono 16/8 ohms, and
Bridge-Mono 100V.
IMPORTANT: Be sure to power off the
amplifier before change the Mode-
switch setting. If this is not done, the Bridge
light will flash to indicate that the power must
be cycled off and back on to reset the mode.
Q. Cooling Vents
Front-to-rear forced airflow.
4 Operation
Figure 4.2 CTs 8200 back panel (shown with touch-proof cover removed).