12
C Series C 20:8X, C 10:8X, C 10:4X and C 5:4X Operation Manual
6 QUICK GUIDE OVERVIEW
The amplifier’s front panel presents the per-
formance and fault condition indicators
(1)
,
power and remote switches
(2)
, and a remov-
able dust filter cover
(3)
. Level potentiometers
located behind the protective front cover provide
individual attenuation for the four or eight amplifier
channels. Range is 0 dB to -infinity. The 12 o’clock
position indicates -10 dB attenuation.
To remove the protective cover, loosen the
thumbscrew at the far left
(4)
. This allows removal of
the dust filters for cleaning, and provides access to
channel attenuation. The front cover may be made
“tamper resistant” by replacing the thumbscrew
with Philips head or safety Torx screw. Thread size
is M3.
6.1.1 Power on/off and remote switch
The Power on/off switch is located on the right side. A
second switch, labeled “REMOTE,” is located above
the Power switch. When the Remote switch is on, (with
the mains connected and power switch turned on)
the yellow LED above it will illuminate indicating that
external power on/off commands from the NomadLink
network connection will switch the amplifier on or
off. When Remote is activated the amplifier will not
switch on until a “Power On” command is received
from the network. When the remote switch is off,
it is not possible to switch amplifier power on or off
using NomadLink network control.
6.1.2 front-panel LEd’s
The front-panel LED area includes the following
indicators per channel:
Temperature mute (Yellow constant)
VHF (Very High Frequency) protection active
(output muted) (Yellow)
Mute channel via NomadLink network
(2x Yellow)
CPL (Current Peak Limiter) active (Orange flashing),
ON/OFF
C10:8X
REMOTE
C SERIES
LABEL AREA
TEMP
VHF
CPL
VPL | CLIP
SIG | HI-IMP
TEMP
VHF
CPL
VPL | CLIP
SIG | HI-IMP
CH|
A
CH|
B
CH|
C
CH|
D
CH|
E
CH|
F
CH|
G
CH|
H
MUTE
FAULT
MUTE
FAULT
MUTE
FAULT
MUTE
FAULT
POWER
BRIDGE
BRIDGE
BRIDGE
BRIDGE
PAL
6.1 front Panel overview
CPL constant (output muted): Low-impedance /
Short circuit detection
Fault (Yellow plus Orange)
VPL (Voltage Peak Limiter) active, VPL/Clip (Red)
-40 dB Signal Present (Green),
Hi-Imp open load detected (Orange)
Bridge mode operation on (Yellow). Ch. A+B, C+D, E+F,
G+H bridged.
Figure 2: Front panel LED display
When no VPL, CPL or PAL indicators are illumi-
nated, and the VPL DIP-switch is set to maximum
at the specified nominal load, the amplifier
channel is able to deliver maximum rated output
power.
Power on (Green)
PAL (Power Average Limiter) active (Red)
NomadLink network active (Blue).
Figure 3: Power and PAL LED display
When the network is connected, the blue No-
madLink LED will illuminate even when mains
power is not connected. NomadLink receives
phantom power from the network supplied by
the NLB 60E.
4
1
3
2
Figure 1: C Series front panel layout