Lab Gruppen d20 4L amp
Lab Gruppen d20 4L amp
Lab Gruppen D20:4L Professional Power Amplifier

Lab Gruppen D20:4L Professional Power Amplifier


2,000 Watt Amplifier with 4 Flexible Output Channels, Lake Digital Signal Processing and Digital Audio Networking for Installation Applications
The D 20:4L is based on the same foundation of robust, high-power amplifier technologies as our renowned PLM Series – an amplifier platform with a proven record of reliability and sonic performance on the world’s most grueling concert tours and in high-profile, large-scale installations.


Processing / NetworkLake / Dante
Number of amplifier channels4
Total burst power all channels (share among channels with RPM)2000 W

Max output power (all channels driven)1

2 ohms500 W
2.67 ohms500 W
4 ohms500 W
8 ohms500 W
16 ohms425 W
Hi-Z 25 V500 W
Hi-Z 70 V500 W
Hi-Z 100 V250 W

Max output power single channel (all models)1

2 ohms850 W
2.67 ohms1150 W
4 ohms1600 W
8 ohms1100 W
16 ohms600 W
Hi-Z 25 V500 W
Hi-Z 70 V1400 W
Hi-Z 100 V1000 W

Amplifier output modules (all models, all channels)

Peak output voltage142 Vpk
Max output Current30 Apk
Rational Power Management (RPM)Share “Total burst power” of the product freely among channels. Any channel can scale up to the “single channel max power”
Default voltage limitation (can be lifted with RPM configuration)100 Vpk
Protection featuresCurrent Average Limiter (CAL), Very High Frequency Protection (VHF), Direct Current Protection (DC), Short Circuit Protection, Current-Clip Limiter, Voltage Clip Limiter, Temperature protection

Amplifier platform

Inter Sample Voltage Peak Limiter (ISVPL)Configurable Peak voltage threshold and profile
Amplifier gainDigital configurable amplifier gain 22 – 44 dB
Dynamic range> 112 dB
Load impedance analysisYes
Temperature controlTemperature regulated fans (front-to-rear airflow) and show must go on limitation (ATL, PTL)
Internal Sample Rate / Data path96 kHz / 32 bit floating point
Product propagation delay AES 96 kHz / analog input1.61 / 1.68 ms

Lake processing

Loudspeaker processingUp to 4 modules of Classic/linear-phase/FIR crossover, EQ, delay, LimiterMax™ – peak and RMS limiters
System tuningGroup control with Raised Cosine™ MESA EG™ asymmetric filters
Input redundancy / MatrixAutomatic 4 level input redundancy / 4 input mixers
System integrationComprehensive 3rd party protocol over UDP Ethernet

Dante Audio Network

Dante I/O8 x 8
Network topology / redundancyFlexible topology / Supports daisy-chained and Dual redundant networks
Sample Rates / Transport48, 96 kHz / Uni + Multicast
Network latency0.25, 0.5, 1.0, 2.0, 5.0 ms

AES Inputs

Inputs4 AES inputs
Supported sample rates / resolution44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits
Sample rate conversion THD+N 20 Hz – 20 kHz unweighted0.0000003

Analog Inputs

Inputs4 high quality inputs with Iso-Float ground isolation
Maximum input / digital reference+26 dBu / +21 dBu
Sampling rate / Resolution96 kHz / 24 bit
Input impedance balanced / unbalanced20 / 10 kOhm
THD+N (typical at 1 kHz unweighted)0.0000022
THD+N (typical at 20 Hz and 20 kHz unweighted)0.0000033

Back panel Interface

Analog inputs4 x Terminal block connectors analog input with +, – and ground
AES inputs4 x Terminal block connectors analog input with +, – and ground
Output connectors4 x 2 pole Terminal block connectors rated at 1000 V / 41 A (exceeding amplifier capacity) Can take up to 8 mm2 (8.2 AWG) cables
Ethernet Ports2 x EtherCon RJ45 Lake Controller, Dante controller and/or DLM (3rd party protocol)
Detachable mains cordDetachable locking 3-pin IEC rated at 250 V / 16 A

Front-panel user interface

System status indication3 x tri-color LED. FRAME, TEMP, PSU for device status indication
Channel status indication3 x tri-color LED per channel. Status indication separated for channel LOAD, AMP, SIGNAL status
MutePer channel touch button for MUTE control and tri-color LED for indication
PowerTouch button for ON/STANDBY control and tri-color LED for power state indication
SelectTouch button and LED for bidirectional device software select functionality

Mains Power

Nominal voltage100 – 240 Volt AC 50 – 60 Hz
Operating voltage70 – 265 V AC 45 – 66 Hz
Mains wall plugSelectable on order CEE 7/7 “Schuko” 230 V / 16 A, NEMA 5-15 125 V / 15 A, BS1363-A 250 V / 13 A, IA16A3 250 V / 16 A, AU/NZ 250 V / 10 A, JP 125 V / 15 A, CPCS-CCC 250 V / 10 A

Power supply features

Soft start / Inrush powerYes
Power factor correction> 0.98 for mains power > 300 W
Regulated switch mode power supply (R.SMPS)Yes
Breaker Emulation Limiter (BEL)No
BEL max current thresholdFixed 8 A
Power Average Limiter (PAL)Yes
Under Voltage Limiter (UVL)Yes
Mains undervoltage and overvoltage protection and mains glitch toleranceYes


Rack rail to rear panelW: 483 mm (19”), H: 44 mm (1 U), D: 425 mm (16.7”)
Overall depth front-rear supportD: 463 mm


Weight7.9 kg (17.3 lbs)


FinishBlack painted steel chassis with grey painted steel front with detachable grille


  • 2,000 Watt amplifier with 4 flexible output channels and up to 1,600 Watts channel output
  • Lake digital signal processing for unparalleled loudspeaker management and system control
  • Integrated 8×8 channels of dual redundant Dante* digital audio networking with AES67 support
  • 4 x 500 Watts into 2 Ohms, 4 x 500 Watts into 2.67 Ohms, 4 x 500 Watts into 4 Ohms, 4 x 500 Watts into 8 Ohms, 4 x 425 Watts into 16 Ohms, 4 x 500 Watts into Hi-Z 25 V, 4 x 500 Watts into Hi-Z 70 V, 4 x 250 Watts into Hi-Z 100 V
  • Proven and reliable IDEEA Class D Output Stage with direct drive 70 and 100 V constant voltage systems as well as low impedance
  • Rational Power Management (RPM) provides total flexibility to allocate available power across all 4 output channels for most efficient use of system inventory
  • Best-in-class Power Factor Correction (PFC) and switch mode power supply reduces running costs and minimizes environmental impact
  • Breaker Emulation Limiter (BEL) with configurable mains current draw threshold and breaker profile to safeguard mains breakers from tripping
  • Configurable Auto Power Down and Adaptive Rail Control enables real world lifetime energy savings
  • Under-Voltage Limiting (UVL) for continued operation during severe mains supply voltage drops
  • Dedicated on-board surveillance and load monitoring for mass notification applications
  • Redundant audio inputs and on-board system surveillance for voice alarm systems
  • CAFE (Configuring Amplifiers For the Environment) software for design, system planning, equipment planning, installation and commissioning
  • Control and monitoring integration with 3rd-party matrix systems including MediaMatrix* and Q-Sys* via dedicated interfacing software
  • Dedicated front-panel mute buttons for each amplifier channel with bicolour LED indication
  • 4 “Lake Class” analog input channels with Iso-Float ground isolation for reliable audio distribution
  • 4 input channels of AES/EBU (AES3) digital audio supporting all standard sample rates up to 192 kHz with 24-bit resolution
  • 2 Neutrik etherCON* RJ-45 ports provide dual redundant Dante interfaces and remote configuration via Lake Controller and Dante Controller software
  • Balanced analog and digital audio inputs and amplifier outputs on plug-in Phoenix* connectors
  • Detachable and locking IEC mains cable rated at 250 V / 16 A with variety of wall plugs selectable on order
  • Removable dust filter grille for increased air circulation and simple maintenance
  • Rugged slimline (1U) rackmount chassis including rear support brackets for ease of installation
  • 10-Year Warranty Program*
  • Designed and engineered in Sweden


With the D 20:4L, those same core technologies have been updated and refocused to provide the ultimate solution for the most demanding digitally networked installed sound applications – in stadia, arenas, theme parks, performing arts centers, racecourses and other large commercial sound installations.

In addition to legendary LAB GRUPPEN reliability and sonic excellence, the D Series incorporates newly refined outputs stage technologies along with installation-targeted hardware and software features that optimize amplifier system design and configuration. Together, these new technologies allow systems integrators to minimize both initial equipment costs and end users’ long-term energy consumption.

At the core of the D Series platform is Rational Power Management (RPM), a proprietary LAB GRUPPEN technology that allows system designers and integrators unprecedented freedom to allocate the output power available on each channel for optimum performance with specific load conditions. RPM technology also enables the integrator to minimize initial equipment costs and reduce rack space requirement since with conventional installation amplifiers, it is often necessary to “over-specify” amplifiers to meet the maximum power demand on one channel, leaving excess power capacity wasted on the remaining channels. RPM reduces costly excess capacity by allowing re-allocation of output power capacity among the four channels – with up to two channels on the D 120:4T/Ta capable of delivering up to 5000 W power output on each channel, leaving the remaining available power to be allocated to the other channels for less demanding loads.

Additional information

Weight7.9 kg
Dimensions42.5 × 48.3 × 4.4 cm

You may also like…