Lab Gruppen C5:4X 4-Channel Amplifier

Main view Lab Gruppen 4800 Watt 4
Lab Gruppen C48:4 4 Channel Amplifier
December 1, 2021
Main view Lab Gruppen 6800 Watt
Lab Gruppen C68:4 4 Channel Amplifier
December 1, 2021
Show all

Lab Gruppen C5:4X 4-Channel Amplifier

(1 customer review)

The Lab Gruppen 500W 4-Channel is a versatile amplifier, delivering 4 × 125 W* at 4 ohms, 8 ohms, 16 ohms or 70 Vrms; 250 W at 100 Vrms is available in bridge mode. The C 5:4X is one of four C…X models in the C Series.


SKU: LAB-C5:4X Category: Tags:
Lab Gruppen Canada

Features of the Lab Gruppen 500W 4-Channel Amplifier

  • 500 Watt, 4-channel amplifier with up to 125 Watts output per channel and NomadLink network for monitoring and control
  • Selectable gain plus scalable Voltage Peak Limiter (VPL) and bridge-mode operation allow custom configuration for any application
  • 4 x 125 Watts into 4 -16 Ohms low impedance or 70V constant voltage
  • Proven and reliable Class-D output stage delivers sonic purity and efficiency
  • Power Factor Correction (PFC) and switch mode power supply reduces running costs and minimizes environmental impact
  • Intuitive Device Control software monitors and controls key functions via the NomadLink network
  • Comprehensive protection scheme including current, voltage, DC, temperature, short circuit and open load warnings
  • Fixed 35 Hz high pass filter, switchable per channel for sub sonic speaker protection
  • 4 x balanced analog audio inputs on 3-pin Phoenix* connectors
  • 4 x barrier strip 2-pole screw terminal output connectors
  • Removable dust filter grille for increased air circulation
  • Compact and durable 2U rackmount chassis saves space in install applications
  • GPIO connectors with power control and indication for 3rd party system integration
  • Universal power supply served through an IEC mains connector
  • 10-Year Warranty Program*
  • Designed and engineered in Sweden



Number of amplifier channels 4
Peak total output all channels driven 500 W
Peak output voltage per channel 100 V
Max output current per channel 5.6 Arms
Max output power (all channels driven)
16 ohms 125 W
8 ohms 125 W
4 ohms 125 W
2 ohms 60 W
Hi-Z per ch. (all ch.’s driven): 70 Vrms / 100 V peak 125 W
Max output power bridged
16 ohms 250 W
8 ohms 250 W
4 ohms 125 W
2 ohms Not recommended 1
Bridged per ch.: 140 Vrms / 200 V peak 250 W
THD 20 Hz – 20 kHz at 1 W <0.1%
THD at 1 kHz and 1 dB below clipping <0.05%
Signal to Noise Ratio >112 dBA
Channel separation (Crosstalk) at 1 kHz >70 dB
Frequency response (1 W into 8 ohms) + 0 / -3 dB 6.8 Hz – 34 kHz
Input impedance 20k Ohm
Common Mode Rejection (CMR) >50 dB, 20 Hz – 20 kHz
Output impedance @ 100 Hz 48 mOhm
Gain, Sensitivity and Limiters
VPL, selectable per ch 2 100, 63, 45, 32 V
VPL, when bridged 2 3 200, 126, 90, 64 V
Voltage Peak Limiter mode (per ch.) Hard / Soft
Amplifier gain selectable (all channels) – rear-panel switches 3 29, 32, 35, 38 dB
Default gain 32 dB
Level adjustment (per channel) Front-panel potentiometer, 21 position detented from -inf to
Connectors and Buttons
Input connectors (per ch.) 3-pin Phoenix, electronically balanced
Output connectors (per ch.) Barrier strip 2-pole screw terminals
Output bridge mode A+B, C+D, E+F, G+H, inputs A, C, E, G are signal source
High pass filter Fixed at 35 Hz, switchable per channel
NomadLink network On board, 2 x RJ45 connectors IN and OUT
Intelligent fans (on/off) Yes, depending on presence of output signal
Power Individual switches on front panel
Cooling Two fans, front-rear airflow, temperature controlled speed
General Purpose Outputs (GPO) Contact Closure types, 2-pole Phoenix
General Purpose Inputs (GPI) Contact Closure types, 2-pole Phoenix
Front-panel user interface
Common NomadLink Network; Power Average Limiter (PAL)4; Power on
Per channel Signal present / High-impedance; Voltage Peak Limiter (VPL); Current Peak Limiter (CPL): Very High Frequency (VHF); High temperature; Fault; Mute
Operating voltage, 230 V / 115 V nominal Universal power supply 65-265 V
Minimum power-up voltage, 230 V / 115 V 80 V
Power Average Limiter (PAL) 4 Yes
Power Factor Correction (PFC) Yes
Soft-start / Inrush Current Draw Yes / max. 5 A
Mains connector IEC inlet
Dimensions W: 483 mm (19”), H: 88 mm (2 U), D: 343 mm (13.5”)
Weight 8.5 kg (18.75 lbs)
Finish Black painted steel chassis with gray painted steel front
Approvals CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC


Lab Gruppen

Founded and based in Sweden over 30 years ago, Lab Gruppen has become one of the most respected professional-grade power amplifier manufacturers in the world. With its unique switch mode and other patented technologies, Lab Gruppen provides advanced power amplifiers and powered loudspeaker management systems that are utterly reliable and sonically superior. Along with its primary focus and heritage in touring and performance audio, Lab Gruppen has more recently forged a reputation in the world of installed sound – applying tour-honed design philosophies to dedicated installation platforms of peerless pedigree. All Lab Gruppen products are designed and engineered in Kungsbacka, Sweden – rigorously tested and quality assured with an industry-renown reputation for reliability and longevity. From the largest performance tours such as U2’s 360 world tour to the most prestigious permanent installations, Lab Gruppen enjoys a truly global customer base. Every Lab Gruppen product has been designed with one clear philosophy in mind: to offer our customer the best possible solution for a given application; sounding better, offering greater value and providing unrivalled peace of mind. All Lab Gruppen amplifiers share a common sonic signature, renowned for pristine audio quality across the range, a product of a pure and focused approach to amplifier design. From the flagship PLM 20000Q – the most advanced and powerful amplification and loudspeaker processing platform on the planet – to the Energy Star approved E Series  range of contractor-friendly installation amplifiers, Lab Gruppen is a by-word for ‘best in class’.

GTR Direct is a proud dealer for Lab Gruppen Canada
Lab Gruppen Canada

1 review for Lab Gruppen C5:4X 4-Channel Amplifier

  1. Chris Black

    Excellent amplifier

Add a review

Your email address will not be published.

32 + = 36