Crown 1160ma Guía Del Usuario

Proper wiring depends on how you configure 
your amplifier. The CH and CL Series offer vari-
ous modes of operation:

•

Constant-voltage load

•

4/8-ohm load

•

Stereo mode

•

Bridge-mono mode

Let’s explain each mode of operation

Each output channel can be independently con-
figured to drive either (1) 4/8-ohm loudspeak-
ers, or (2) step-down transformers in a 
distributed “constant voltage” loudspeaker sys-
tem. “Constant voltage” refers to 70V operation 
with models CH1, CH2 and CH4 only. Also, the 
amplifier can be configured for Dual or Bridge 
modes. Various combinations of these modes 
are possible.

CH and CL Series amplifiers can be configured 
for either Stereo (dual channel) or Bridge (sin-
gle mono channel) modes of operation. To 
switch your amplifier accordingly, set the 
recessed “Stereo/Bridge” switch to the desired 
setting as shown in Figure 2.8.

CH Series amplifiers only: Select 4/8 ohm 
or 70V operation as appropriate for your appli-
cation and your amplifier. Select output opera-
tion by sliding the recessed Output Operation 
switches to the desired position as shown in 
Figure 2.9. 

When the CH Series amplifier is set up for two-
channel (Stereo mode) operation, it is possible 
to configure the output channels for either 4/8 
ohm or 70V operation. 

CAUTION: Output Terminals are acti-
vated by selection of an output opera-
tion mode via the Output Operation 
switches. All other Output Terminals are 
inactive. For example, when 4/8 Ohm Opera-
tion is selected, the 70V connections are inac-
tive, with no audio present at those Output 
Terminals.

Figures 2.9 through 2.16 on the following 
pages show common ways to install CH and CL 
Series amplifiers in a sound system. Input and 
output terminals are located on the back panel. 

CAUTION: Always disconnect the AC 
power and turn the level controls off 
when making or breaking connections. 
This is very important when loudspeakers are 
connected because it reduces the chance of 
loud blasts that can cause loudspeaker dam-
age.

CAUTION: Never tie an amplifier’s out-
puts together directly while in Stereo 
mode. Never parallel them with the out-
put of another amplifier. Such connections 
do not result in increased output power, but 
may cause overheating and premature activa-
tion of the protection circuitry.

Note: The Channel 2 input jack and Input Level 
control are not defeated in Bridge mode. A sig-
nal feeding Channel 2 will work against the 
Channel 1 signal, and usually results in distor-
tion and inefficient operation.

CH1

4/8

V

Ω 70

4/8

V

Ω 70

CH2

Channel Operation