CH and CL Series Power Amplifiers
2 Setup
2.6 Switch Settings
Proper wiring depends on how you configure your amplifier. The CH and CL Series offer vari- ous modes of operation:
•
•
• Stereo mode
•
Let’s explain each mode of operation
Each output channel can be independently con- figured to drive either (1)
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.
Figure 2.8 Stereo/Bridge Mode Switch
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.
Channel Operation4/8Ω 70V 4/8Ω 70V
CH1 CH2
Model CH4
Models CH1 and CH2
Figure 2.9 Channel Operation Switches
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.
WARNING: If Bridge mode is used with 70V output, the amplifier will actually deliver 140 volts.
WARNING: The two Output Operation switches must be set to identical posi- tions (4/8 ohm or 70V mode) when oper- ating in Bridge mode. Never change switch positions with power turned on.
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.
page 8 | Operation Manual |
