Crown CTs 1200, Operation Manual

Page: 10 / 167

Operation Manual
CTs 2-Channel Power Amplifiers
page 10
3.6.3 Dual 70V/100V Mode
Typical input and output wiring, along with Atten-
uator and Mode Switch settings are shown in Fig-
ures 3.10 and 3.11. Make sure the Mode switch is
set to the “Dual” position when operating in Dual
mode.
INPUTS: Connect input wiring to both channels.
OUTPUTS: In Dual Mode, the CTs 600/1200 can
power 25/50/70V lines; the CTs 2000/3000 can
power 25/50/70/100V lines. Connect each chan-
nel of output connectors to speakers that have the
appropriate transformers.
.
3.6.4 Bridge-Mono 140V/200V Mode
Typical input and output wiring, along with Atten-
uator and Mode Switch settings are shown in Fig-
ures 3.12 and 3.13. Make sure the Mode switch is
set to the “Mono” position when operating in
Bridge-Mono mode.
INPUTS: Connect input wiring to Channel 1 only.
OUTPUTS: In Bridge-Mono mode, the CTs 600/
1200 can power 140V lines; the CTs 2000/3000
can power 140V and 200V lines. Connect speak-
ers with 140V or 200V transformers across the
positive terminals of the channel pair. Do not use
the negative terminals of the channel pair when
the pair is being operated in Bridge-Mono mode.
Refer to Section 3.5 for output connector pin
assignments.
NOTE: When operating in Bridge-Mono
mode, turn down (full CCW) the Input
Attenuator for Channel 2. The Channel-1
Input Attenuator works both channels.
Figure 3.11 System Wiring and Y-Switch Setting for 70V/100V Operation
Figure 3.12 Attenuator and Mode-Switch
Settings for 70V/100V Operation
Figure 3.13 System Wiring and Y-Switch Setting for 140V/200V Operation
Figure 3.14 Attenuator and Mode-Switch
Settings for 140V/200V Operation
3 Setup
Always route the input and output wires in
separate bundles.