14
C Series
Quick Start Guide
15
Product Overview
Front Panel Overview
The amplifier’s front panel presents the performance and fault condition indicators, power and remote switches, and a removable dust-filter cover. Four level
potentiometers located behind the cover provide individual attenuation for the four amplifier channels. Range is 0 dB to -infinity. The 12 o’clock position indicates
-10 dB attenuation. A label area is located beneath the LED display.
To remove the dust-filter cover, loosen the thumbscrew at the far left. 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 a Philips head or safety Torx screw. Thread size is M3.
NOTE:
Never operate the amplifier without the dust-filters in place.
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.
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)
•
CPL (Orange constant with output muted):
constant (output muted): Low impedance / short circuit detection
•
Fault
(Yellow plus Orange)
•
VPL
(Voltage Peak Limiter) active, VPL/Clip (Red)
•
4 dB
signal level (Green)
•
-10 dB
signal level (Green)
•
-40 dB
signal level (Green)
•
Hi-Imp
open load detected (Red)
•
Bridge mode
operation on (Yellow). Ch. A+B, C+D, E+F, G+H bridged.
PAL
(PWR) Power on (Green)
(PAL) Power Average Limiter active (Red)
Option active (Yellow)
NomadLink network active (Blue)
NOTE:
When no VPL, CPL or PAL indicators are illuminated, 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.
NOTE:
When the network is connected, the blue NomadLink LED will illuminate even when mains power is not connected. NomadLink receives phantom power from
the network supplied by the NLB 60E.
Rear panel
WIRING
NORMAL: CLASS 2
BRIDGED: CLASS 3
44dB
41dB
38dB
35dB
32dB
29dB
26dB
23dB
141V*
118V
100V**
85V
71V
59V
50V
42V
*100Vrms
**70Vrms
Ser. N:o
Removed!
SPEAKER OUTPUTS
BALANCED INPUTS
CH
D
CH
B
CH
C
CH
A
(1)
(2)
(3)
(4)
(5)
(1)
Mains input 115 V and 230 V operation (Not selectable)
(2)
NomadLink network In and Out on EtherCon-housed RJ45 connections
(3)
DIP-switches for adjusting key features (see below)
(4)
3-pole Phoenix input connectors
(5)
2-pole screw terminal output connections
The DIP-switch features
The following features may be adjusted using the DIP-switches on the rear-panel of the amplifier.
Gain
– Set for all four or eight channels from +29 to +38 dB in 3 dB steps.
Fan Masked
– When on, engages the intelligent fan feature; fan speed is lowered when no signal is present.
Bridge Mode
– Switches the channel pairs into bridge mode operation. An automatic -6 dB gain compensation is applied.
VPL
– Voltage Peak Limiter adjustment is provided for 8 individual levels. Select the setting most appropriate for connected speakers. See Appendix for details.
Mode
– Select VPL mode between Hard and Soft. For channels driving sub-woofers and low-end frequencies, it is recommended to use the Hard setting for optimal
operation. For mid- and high-frequency drivers, always select Soft.