Lab Gruppen C5:4X 4-Channel Amplifier

(1 customer review)
Lab Gruppen Canada

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.

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

Lab Gruppen is a premium brand in the professional audio industry, providing high-quality power amplifiers and associated products for sound reinforcement applications. With over 35 years of experience, the brand has established itself as a leading brand in the market, offering advanced audio technology, exceptional sound quality, and reliable performance.

Their products include amplifiers for various applications, including live sound, installations, touring, and recording studios. Lab Gruppen's team of experts works closely with their clients to provide customized solutions that meet their specific needs and budget, ensuring a seamless and successful audio experience.

Lab Gruppen's commitment to quality and customer satisfaction has earned them a reputation for excellence in the industry. They strive to deliver exceptional products and services that exceed their customers' expectations and contribute to the success of every event they serve.

With a strong focus on innovation and technology, Lab Gruppen is constantly pushing the boundaries of what is possible in the professional audio industry. Their products are designed with both performance and efficiency in mind, providing audio professionals with the tools they need to create exceptional sound experiences while minimizing their environmental impact.

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

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