Lab.gruppen C Series C 10 4X Supplementary Manual

C 10:4X
Architect’s and Engineer’s Specifications
C Series: Dedicated Installation Amplifiers
Lab.gruppen ab •  Sweden
 internationaL contact • [email protected]   |   uS contact • [email protected]
www.labgruppen.com
Overview: Channel Modes and Network 
The power amplifier shall provide four discrete channels of amplifi-
cation. Rear-panel switches shall enable bridging of adjacent channels 
to allow reconfiguration as a 2- or 3-channel amplifier. Each channel 
shall  be  capable  of  independently  driving  either  low-impedance  or 
high-impedance  (70  V/100  V)  loads.  The  output  circuit  topology 
shall  be Class D. The amplifier shall be equipped with sensing and 
communication circuits to allow comprehensive remote control and 
monitoring  functions  via  a  separate  bridge  and  network  controller. 
The  proprietary  control  and  monitoring  network  shall  employ  TCP/
IP protocols, use Cat-5 cable for interconnection, and allow remote 
control from an external PC using proprietary software.
Power Output and Performance
Maximum  total  output  of  all  four  channels  shall  be  1000  watts.  In 
discrete  four-channel  mode,  each  amplifier  channel  shall  deliver 
maximum  continuous  output  power  as  follows:  250  watts  into  16 
ohms,  250  watts  into  8  ohms;  250  watts  into  4  ohms;  125  watts 
into 2 ohms; or 250 watts into a high impedance (70 Vrms / 100 V 
peak) load. Maximum output voltage per channel shall be 71 Vrms; 
maximum  output  current  per  channel  shall  be  8  Arms.  In  bridged 
mode,  each  bridged  channel  shall  deliver  maximum  continuous 
output power as follows: 500 watts into 16 ohms; 500 watts into 8 
ohms; 250 watts into 4 ohms; or 500 watts into a high impedance 
(140 Vrms / 200 V peak) load.
Default  amplifier  gain  shall  be  32  dB,  with  rear-panel  adjustment 
from  29  -  38  dB  in  3  dB  increments,  selectable  for  each  channel. 
For  bridged channels, the amplifier shall  automatically  compensate 
-6 dB gain internally to maintain consistent output to all channels at 
selected gain.
The  amplifier  shall  exhibit  the  following  performance  parameters 
with  gain  set  at  32  dB  and  VPL  (Voltage  Peak  Limiter)  at  100  V:  
Frequency response shall be 2.3 Hz to 56 kHz (+0/-3 dB at 1 watt 
into an 8 ohm load); channel separation shall be greater than 70 dB; 
and signal-to-noise ratio shall be greater than 112 dBA. THD at 1 watt 
(20 Hz - 20 kHz) shall be less than 0.1%; THD at 1 kHz shall be no 
more than 0.05% at 1 dB below clipping.
A Voltage Peak Limiter shall limit peak output as determined by rear-
panel switches. In discrete four-channel mode, peak voltage shall be 
selectable in four steps across a range of 100 V to 32 V. In bridged 
mode, peak voltage shall be selectable in four steps from 200 V to 64 
V. The voltage limiter mode shall be selectable for either hard or soft 
limiting characteristics.
Connectors, Controls, and Indicators
The following connectors and controls shall be provided on the REAR- 
PANEL of the amplifier. The input connectors shall be electronically 
balanced, 3-pin Phoenix connectors. The output connectors shall be 
2-pole barrier strip screw connectors. DIP-switches shall determine 
the following: amplifier gain (29 dB to 38 dB in 3 dB increments); fan 
masked;  and  bridged  mode  selection  for  channel  pairs.  Additional 
DIP-switches  shall  determine  Voltage  Peak  Limiter  values  (select-
able per channel), Hard or Soft limiting characteristic, and insertion 
of a 35 Hz high pass filter. Two RJ45 connectors shall be provided for 
input and output of the control and monitoring network signals. 
GPIO (General Purpose Input/Output) functions shall be provided on 
two 2-pole Phoenix  connectors and two DIP-switches. GPIO  func-
tions shall include power on/off (toggled or same-state) and defeat 
of on/off commands from the network.
The following indicators and controls shall be provided on the FRONT- 
PANEL  of  the  amplifier.  Four  level  control  potentiometers,  one  for 
each channel, shall be provided beneath a front-panel security cover; 
potentiometers shall be detented and provide attenuation from 0 dB 
to infinity in 21 steps. Two separate switches shall be provided for 
power  on/off  and  remote  power  on/off  enabling.  Front-panel  LED 
indicators  shall  display  the  status  of  power  on/off,  NomadLink
® 
network  connection,  and  Power  Average  Limiter  (PAL).  Additional 
LED indicators shall be provided for each channel: signal present and 
high-impedance warning (SIG HI-IMP), Voltage Peak Limiter (VPL), 
Current Peak Limiter (CPL), Very High Frequency (VHF), high tem-
perature warning and fault (TEMP), and MUTE. 
 
Power Supply, Protection, and Cooling 
The power supply shall be a universal type (AC line input between 
100 and 240 VAC at 50 or 60 Hz) with Power Factor Correction and 
a PAL™ (Power Average Limiter) circuit to prevent excessive current 
draw. A  soft  start circuit shall limit  current  inrush  at  power-up to 5 
A. The amplifier shall be cooled by two temperature-controlled, vari-
able-speed fans, with air flow from front-to-back. Adaptive fan on/off 
function shall be dependent on presence of an output signal. 
Physical
The amplifier  shall  be 483 mm  (19 in.) wide, 88  mm (3.5  in / 2 U) 
high, and 343 mm (13.5 in.) deep. The weight shall be 8.5 kg (18.75 
lbs). The chassis shall be black painted steel with a grey painted steel 
front-panel. 
The amplifier shall be approved for use as specified by CE, ANSI/UL, 
ETL and the FCC. The amplifier shall be the Lab.gruppen C 10:4X.
Item no. AES-C104X

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