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Everything In Music Since 1958
Everything In Music Since 1958

Lab Gruppen D 20:4L 2000 Watt Lake Amplifier With 4 Flexible Output Channels

Out of Stock
Original price $2,899.00
Original price $2,899.00 - Original price $2,899.00
Original price $2,899.00
Current price $2,853.95
$2,853.95 - $2,853.95
Current price $2,853.95
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

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Get An Amplifier Platform With A Proven Record Of Reliability - The Lab Gruppen D 20:4L 2000 Watt Lake Amplifier With 4 Flexible Output Channels

D 20:4L Combines 2000 W of Flexible Power with the Latest LAKE DSP, DANTE Digital Audio Networking and Advanced System Integrity Monitoring.

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.

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.



  • Processing / Network: Lake / Dante
  • Number of amplifier channels: 4
  • Total burst power all channels (share among channels with RPM): 2000 W

Max output power (all channels driven)1

  • 2 ohms: 500 W
  • 2.67 ohms: 500 W
  • 4 ohms: 500 W
  • 8 ohms: 500 W
  • 16 ohms: 425 W
  • Hi-Z 25 V: 500 W
  • Hi-Z 70 V: 500 W
  • Hi-Z 100 V: 250 W

Max output power single channel (all models)1

  • 2 ohms: 850 W
  • 2.67 ohms: 1150 W
  • 4 ohms: 1600 W
  • 8 ohms: 1100 W
  • 16 ohms:600 W
  • Hi-Z 25 V: 500 W
  • Hi-Z 70 V: 1400 W
  • Hi-Z 100 V: 1000 W

Amplifier output modules (all models, all channels)

  • Peak output voltage: 142 Vpk
  • Max output Current: 30 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 Features: Current 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 gain: Digital configurable amplifier gain 22 - 44 dB
  • Dynamic range: > 112 dB
  • Load impedance analysis: Yes
  • Temperature control: Temperature regulated fans (front-to-rear airflow) and show must go on limitation (ATL, PTL)
  • Internal Sample Rate / Data path: 96 kHz / 32 bit floating point
  • Product propagation delay AES 96 kHz / analog input: 1.61 / 1.68 ms

Lake Processing

  • Loudspeaker processing: Up to 4 modules of Classic/linear-phase/FIR crossover, EQ, delay, LimiterMax™ - peak and RMS limiters
  • System tuning: Group control with Raised Cosine™ MESA EG™ asymmetric filters
  • Input redundancy / Matrix: Automatic 4 level input redundancy / 4 input mixers
  • System integration: Comprehensive 3rd party protocol over UDP Ethernet

Dante Audio Network

  • Dante I/O: 8 x 8
  • Network topology / redundancy: Flexible topology / Supports daisy-chained and Dual redundant networks
  • Sample Rates / Transport: 48, 96 kHz / Uni + Multicast
  • Network latency: 0.25, 0.5, 1.0, 2.0, 5.0 ms

AES Inputs

  • Inputs: 4 AES inputs
  • Supported sample rates / resolution: 44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits
  • Sample rate conversion THD+N 20 Hz - 20 kHz unweighted: 0.0000003

Analog Inputs

  • Inputs: 4 high quality inputs with Iso-Float ground isolation
  • Maximum input / digital reference: +26 dBu / +21 dBu
  • Sampling rate / Resolution: 96 kHz / 24 bit
  • Input impedance balanced / unbalanced: 20 / 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 inputs: 4 x Terminal block connectors analog input with +, - and ground
  • AES inputs: 4 x Terminal block connectors analog input with +, - and ground
  • Output connectors: 4 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 Ports: 2 x EtherCon RJ45 Lake Controller, Dante controller and/or DLM (3rd party protocol)
  • Detachable mains cord: Detachable locking 3-pin IEC rated at 250 V / 16 A

Front-panel user interface

  • System status indication: 3 x tri-color LED. FRAME, TEMP, PSU for device status indication
  • Channel status indication: 3 x tri-color LED per channel. Status indication separated for channel LOAD, AMP, SIGNAL status
  • Mute: Per channel touch button for MUTE control and tri-color LED for indication
  • Power: Touch button for ON/STANDBY control and tri-color LED for power state indication
  • Select: Touch button and LED for bidirectional device software select functionality

Mains Power

  • Nominal voltage: 100 - 240 Volt AC 50 - 60 Hz
  • Operating voltage: 70 - 265 V AC 45 - 66 Hz
  • Mains wall plug: Selectable 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

  • Soft start / Inrush power: Yes
  • 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 threshold: Fixed 8 A
  • Power Average Limiter (PAL): Yes
  • Under Voltage Limiter (UVL): Yes
  • Mains undervoltage and overvoltage protection and mains glitch tolerance: Yes


  • Rack rail to rear panel W: 483 mm (19”), H: 44 mm (1 U), D: 425 mm (16.7”)
  • Overall depth front-rear support: D: 463 mm
  • Weight: 7.9 kg (17.3 lbs)
  • Finish: Black painted steel chassis with grey painted steel front with detachable grille
  • Approvals: CE, ETL (ANSI/UL, CSA), PSE, RCM, BIS, CCC

Manufacturer: Lab Gruppen
Model: D 20:4L_US1
SKU: I434612-N-0-WHXB
UPC: 7331573003949

We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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