Manualshelf

Operation Manual

ManualsBrandsLab Gruppen ManualsPower Amplifiers500W 4-Channel Amplifier with NomadLink Network Monitoring and Dedicated Control for Install Applications
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5. Operation and performance
C SERIES Operation Manual rev 2.0.0
21
5.4.7. Constant voltage 70 V and 100 V systems setup and operation
When using C Series ampliers to drive constant voltage (high-impedance) speaker systems at 70 Vrms or 100 V
peak, you can in most cases simply connect the speakers to the amplier output terminals, select the correct VPL
setting, and place the amplier in service.
5.4.8. Output Current Peak Limiter (CPL)
The Current Peak Limiter (CPL) ensures that the amplier will not be damaged by trying to deliver current to the
outputs exceeding the physical limitations the transistors. The CPL keeps the amplier within the Safe Operating
Area. The CPL is non-adjustable and has different limit values depending on model type. The maximum output
current values for the four C...X models are:
• C 20:8X, 8 Arms per channel
• C 10:8X, 5.6 Arms per channel
• C 10:4X, 8 Arms per channel
• C 5:4X, 5.6 Arms per channel
CPL activity is indicated by illumination of an orange LED for each channel on the front-panel. Warnings also are
shown in the DeviceControl software’s GUI.
A steadily illuminated orange CPL LED indicates a short circuit situation (or very low impedance). The output will
mute for 6 seconds before measuring the output impedance again. This will continue until the short circuit is xed,
at which time the output will automatically un-mute. An input signal must be present to allow detection of short
circuit or low impedance conditions.
TIP: If the CPL LED is steadily illuminated orange while the output is muted and the -4 dB signal LED is
NOT on, then the amplier output is detecting a short circuit or low impedance condition. The problem
can be solved by checking input and output cables and examining the state of the loudspeaker load. If
there is no short circuit present, then the condition may be rectied by lowering the VPL or input levels.
If the CPL indicator is lit continuously, then the amplier is delivering excessive current and is being forced into a
current limiting state (output muted).