Back Panel Controls And Connectors - Crown CTs 1200 Operation Manual

CTs Power Amplifi ers
4 Operation
4.3 Back Panel Controls
and Connectors.
CTs 2000/3000 back panel is shown.
CTs 600/1200 look slightly different near
the Reset button.
M. Power Cord Connector
Standard 15 amp IEC inlet. A circuit breaker
located near the IEC power inlet protects the
amplifi er from excessive AC current draw.
N. Reset Switch
Resets the circuit breaker that protects the
power supply.
O. Ventilation Grille
Air fl ow is front to back. Do not block the
ventilation grilles.
P. PIP ™ Input Panel
PIP2-BBY module includes two balanced
3-pin removable barrier connectors. The
"Y" Input Switch is described under
letter R.
Operation Manual
Sensitivity Switches
Behind the input panel are the Input
Sensi tivity Switches. One 3-position
switch per channel selects various
sensitivity set tings. See Section 5.2.4 for
details and diagram.
Q. Mode Switch
This two-position switch is used to select
the amplifi er's mode of operation: Dual or
Bridge Mono.
Dual mode is used for 2/4/8 ohms, for 70V
operation with the CTs 600/1200, and for
70/100V operation with the CTs
2000/3000.
Bridge mode is used for 4/8/16 ohms, for
140V operation with the CTs 600/1200,
and for 100/140/200V operation with the
CTs 2000/3000.
R. "Y" Input Switch
When set to ON, this switch parallels the
input signals of the two channels, for use
when the input signal is mono. The
ampli fi er's channel outputs are still
independent. The "Y" Input Switch also can
Figure 4.2 CTs 2000 and 3000 Back Panel Controls and Connectors
be used to daisy-chain the signal to
another amplifi er. See Section 3.6.5 for
details.
S. Input Connectors
Balanced 3-pin terminal block connectors,
one per channel.
T. Channel Level Controls
One 21-position detented rotary attenuator
per channel, ranging from –100 dB to 0 dB
gain.
U. High-Pass Filter
One 3-position switch per channel selects
between OFF, 35Hz and 70Hz 3rd-order
fi l ters.
V. Speaker Connectors
One four-pole touch-proof terminal strip.
Accepts up to 10 AWG terminal forks.
Output Cover (not shown)
This covers the output connectors,
pro tecting users from the connectors'
poten tially high voltage. This cover is
required for Class 2 wiring installations.
See Sec tion 3.5 for details on removing
covers that have two holes.
page 17