Lab Gruppen FP4000

4,000W, 2 Channel Touring Amplifier w/ Binding Posts

We apologize

This item has been discontinued

Get FAST answers from customers ASK a Question See questions answers

Refined, Optimized, Effortless

Although an output rating of 2000 W per channel places it at the low end of the FP+ Series, the value-priced FP 4000 has ample reserves for a wide variety of applications, including effortless driving of mid- and high-frequency bands in line array systems as well as the top or bottom end of monitor wedges.

A refined Class TD® output stage is optimized for effortless reproduction of extreme low frequency content, while the Regulated Switch Mode Power Supply (R.SMPS) has been updated to provide more sustained high power during extended bursts of low frequency content. The FP 4000 is shipped with a NomadLink® network interface as standard. In conjunction with DeviceControl software, NomadLink allows monitoring of all key amplifier parameters and remote control of power on/off, channel mutes, and channel solo functions. (NomadLink requires the separate NLB 60E NomadLink Bridge & Network Controller)

General Features:
  • 2 Channel Touring Amplifier with Binding Posts
  • High power density – The FP 4000 delivers a total of 4000 W (2 x 2000 W @ 2 ohms) in only 2U
  • Lab.gruppen sound quality – FP 4000 amplifiers maintain the Lab.gruppen’s reputation for sound quality, with transparent mid- and high-frequency performance and new circuit designs optimized for sustained low-frequency output
  • NomadLink® network ready – Monitoring and control of key functions accessible via the intuitive DeviceControl software and the robust, daisy-chained NomadLink® network, as well as by the leading third party control platforms
  • Patented Class TD® amplifier topology – Road-proven output stage delivers Class B audio quality with Class D efficiency
  • Regulated Switch Mode Power Supply (R.SMPS™) – Output power remains constant even with significant drops in the mains voltage
  • Efficient cooling system – Unique, lightweight Intercooler® copper cooling system dissipates more heat to allow extended peak output
  • Adjustable parameters – Selectable Gain, scalable Voltage Peak Limiter (VPL™), and bridge-mode operation allow custom configuration for any system or application
  • XLR input and link connectors
  • Heavy-duty binding post or Speakon™ output connectors
  • Comprehensive protection and warning – Excessive output current, DC, high temperature, very high frequency (VHF), short circuit, open load, mains fuse protection, and soft start
  • 1-year Manufacturer's warranty
Power Output:
  • Number of channels: 2
  • Peak total output both channels driven: 4000 W
  • Peak output voltage per channel: 121 V
  • Max. output current per channel: 50 A peak
  • MAX Power Rating:
    • 16 ohms: 400 watts x 2 chan.
    • 8 ohms: 800 watts x 2 chan.
    • 4 ohms: 1600 watts x 2 chan.
    • 2 ohms: 2000 watts x 2 chan.
  • MAX Power Rating Bridged:
    • Bridged, 16 ohms: 1600 watts x 1 chan.
    • Bridged, 8 ohms: 3200 watts x 1 chan.
    • Bridged, 4 ohms: 4600 watts x 1 chan.
Performance with Gain: 35 dB and VPL: 150 V
  • THD 20 Hz - 20 kHz for 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: 2 Hz - 34.2 kHz
  • Input impedance: 20 kOhm
  • Input Common Mode Rejection, CMR: 45 dB
  • Output impedance @ 100 Hz: 56 mOhm
Voltage Peak Limiter (VPL), max. peak output
  • VPL, selectable per ch: 121, 101, 83, 70, 56, 47, 38V
  • VPL, selectable when bridged: 242, 202, 166, 140, 112, 94, 76V
  • Voltage Peak Limiter mode (per ch.): Hard / Soft
Gain and Level:
  • Amplifier gain selectable (all channels) rear-panel switches: 23, 26, 29, 32, 35, 38, 41, 44 dB
  • Default gain: 38 dB
  • Level adjustment (per ch.): Front-panel potentiometer, 31 position detented from -inf to 0 dB
Connectors and Switches:
  • Input connectors (per ch.): 3-pin XLR, electronically balanced
  • Output connectors (per ch.): Neutrik Speakon or Binding Posts (must be specified upon order)
  • Output bridge mode: A+B - Ch. A is signal input source
  • NomadLink® network: On board, 2 x RJ45 EtherCon connectors, IN and OUT
  • Intelligent fans (on/off): Yes, depending on presence of output signal
  • Power on/off and Remote enable on/off: Individual switches on front-panel
  • Cooling: Two fans, front-to-rear airflow, temperature controlled speed
Front-panel indicators:
  • Common: NomadLink Network; Power Average Limiter (PAL) 2); Power on
  • Per channel: Signal present / High-impedance; -20 dB, -15 dB, -10 dB and -4 dB output signal; Voltage Peak Limiter (VPL); Current Peak Limiter (CPL); Very High Frequency (VHF); High temperature; Fault; Mute
  • Operating voltage (230V / 115V nominal): 130-265V / 65-135V
  • Minimum power-up voltage: 230V / 115V 171V / 85V
  • Power Average Limiter (PAL): Yes
  • Soft start / Inrush Current Draw Yes / max. 5 A
  • Mains connector 230 V CE: 16 A, CEE7; 115 V ETL: 20 A / NEMA 5-20P
  • Dimensions: (W/H/D) W: 483 mm (19”), H: 88 mm (2 U), Overall D: 396 mm (15.6”), Mounting D: 358 mm (14.1”)
  • Weight: 12 kg (26.4 lbs.)
  • Finish: Black painted steel chassis with gray painted steel front
  • Approvals: CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC

Power Specifications

Number of Channels
This is the number of channels that the professional amplifier is designed to power.
2 Channels
Continuous Power @ 8 ohm
This is the continuous (RMS) power output of the amplifier at an 8 ohm impedance.
800 watts x 2 channels
Continuous Power @ 4 ohm
This is the continuous (RMS) power output of the amplifier at an 4 ohm impedance.
1600 watts x 2 channels
Continuous Power @ 2 ohm
This is the continuous (RMS) power output of the amplifier at an 2 ohm impedance.
2000 watts x 2 channels
Continuous Power @ 8 ohm (Bridged)
This is the continuous (RMS) power output of the amplifier at a bridged 8 ohm impedance.
3200 watts x 1 channels
Continuous Power @ 4 ohm (Bridged)
This is the continuous (RMS) power output of the amplifier at a bridged 4 ohm impedance.
4600 watts x 1 channels
Total Continuous Power
This is the total continuous power rating (RMS) that the amplifier is able to output.
4600 watts

Amplifier Specifications

Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
112 dB
Frequency Response
The range of frequencies the amplifier will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
2 - 34200 Hz
THD (Total Harmonic Distortion)
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
Voltage Gain
This is the voltage gain of the amplifier measured in decibels.
38 dB
Cooling Options
These are the different cooling systems used in the amplifier to keep it cool.
Cooling Fan
These are the type of input connections that the amplifier has.
These are the types of output connections that the amplifier has.

Physical Specifications

The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
Weight (Pounds)
This is the weight of the item in pounds (lbs).
26.4 lbs
Rackmount Spaces
This is the total number of spaces that the preamplifier will occupy when mounted on a rack.

Specials with this Item

Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating

Hide answersShow all answers | Sort by
No questions have been asked about this item. Be the first!

Product Summary


Model Number




Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Lab Gruppen FP4000

Item Added to Cart

Lab Gruppen FP4000

4,000W, 2 Channel Touring Amplifier w/ Binding Posts


Keep Shopping

Get Added Peace of Mind with SquareTrade

Why SquareTrade?

  • The #1-Rated Protection Plan
  • 5-Day Service Guarantee & Free Shipping
  • Protection from Normal, Everyday Use
You have added a warranty
Add Warranty
3 years of protection