Soft-Start; Front-Panel Monitoring And Adjustments; Level Indicators - Lab.gruppen C Series C 10 4X Operation Manual

7 OPERATION AND PERFORMANCE
7.6.8

Soft-start

High powered amplifiers with inadequate inrush
limiting can pull considerable current from the mains
at turn-on. This can result in fast acting mains breakers
tripping. Such is not the case with C Series amplifiers.
The C Series amplifiers have very low inrush power as
the capacitors are charged slowly and in a controlled
manner ensuring that breakers will not trip.
Several amplifiers will, under normal conditions, be
able to be powered up simultaneously. If you do
experience problems powering up multiple amplifiers
simultaneously, use the NomadLink network and the
NLB 60E to establish a power sequence with a pre
set delay between each amplifier's start-up.
22 C Series C 20:8X, C 10:8X, C 10:4X and C 5:4X Operation Manual
7.7 front-panel monitoring and
adjustments

7.7.1 Level indicators

Five LED indicators per channel are contained on
C...X amplifier front panels:
Figure 11: Front panel LED indicators
1. Orange CPL (Current Peak Limiter) flashing
indicates signal exceeds the limits of the output
devices and limiting is in effect.
2. Red VPL/CLIP indicates that the signal has
exceeded maximum output voltage (Maximum
voltage is determined by rear-panel VPL
settings).
3. Signal / Hi-Imp (Green/Red) indicates an output
signal above -44 dB. If it turns Red, this indicates
that a high impedance ("open" connection) has
been detected at the output. This can be a fault
such as a disconnected cable or malfunctioning
driver. However, it could indicate acceptable
high impedance, such as a sub-bass enclosure
with high impedance at a certain frequency.