LAB GRUPPEN เพาเวอร์แอมป์ FP 4000 เครื่องขยายเสียง กำลังวัตต์สูง delivers a total of 4000 W (2  x 2000 W @ 2 ohms) in only 2U

A Benchmark For Touring Amplification

Over the past decade, the tight and transparent sound of 

Lab.gruppen touring amplifiers has earned the praise of renowned 

FOH engineers and leading sound rental companies worldwide. 

The FP+ Series model FP 4000 continues this tradition. At the core 

of the FP 4000’s performance is the patented Class TD output stage, 

a breakthrough amplifier topology that approaches the exceptional 

efficiency of Class D while retaining the sonic purity of proven Class B 

technology designs. Further contributing to the remarkable efficiency 

of the FP 4000 is a Regulated Switch Mode Power Supply (R.SMPS), 

which gives the added benefit of stabilizing rail voltages to the output 

even with wide fluctuations of mains voltage. A highly refined and 

updated circuit layout optimizes the interaction of R.SMPS and Class 

TD to produce the high power density of the FP 4000.

To keep its cool under extreme demands, the FP 4000 relies on 

Lab.gruppen’s proprietary Intercooler. This innovation uses thousands of copper fins to multiply the exposed heatsink surface’s rapid 

heat dissipation. Also, all output devices are mounted transverse to 

the airflow for uniform cooling. As a result, the FP 4000 delivers 

Lab.gruppen’s’ trademark “all the power, all the time” with no 

degradation of sonic performance.

To maximize headroom in any application, the FP 4000 offers 

adjustable input gain along with Lab.gruppen’s exclusive Voltage Peak 

Limiter (VPL). Adjustable on a per-channel basis, VPL optimizes the 

output for any load, from a single massive subwoofer to a series of 

HF compression drivers.

The comprehensive warning and protection features on the 

FP 4000 safeguard output circuits and connected loads while also 

extending amplifier life and minimizing the chance of service interuptions. Whether it’s a matter of faulty wiring, improper use, or extreme 

ambient temperatures, the FP 4000 gives clear indication of any problems. Automatic protection measures engage only at critical thresholds. Operating conditions are re-checked every six seconds and, if 

a fault is detected, normal operation is resumed when measurements 

return to nominal. 

The FP 4000 is shipped with a NomadLink network interface as 

standard. In conjunction with DeviceControl software, NomadLink 

allows comprehensive monitoring of amplifier status (including fault 

or warning indications) and also enables remote control of power on/

off, channel mute, and channel solo functions. NomadLink is compatible with popular third-party control platforms; a separate NLB 60E 

NomadLink Bridge & Network Controller is required.

Specifications FP 4000

General

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. Output Power 2 ohms 4 ohms 8 ohms 16 ohms

Per ch. (both ch.’s driven) 2000 W 1600 W 800 W 400 W

Bridged per ch. n.r. 3) 4600 W 3200 W 1600 W

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, 38 V

VPL, selectable when bridged 1) 242, 202, 166, 140, 112, 94, 76 V

Voltage Peak Limiter mode (per ch.) Hard / Soft

Gain and Level

Amplifier gain selectable (all channels) 1) 

– 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

Power

Operating voltage, 230 V / 115 V nominal 4) 130-265 V / 65-135 V

Minimum power-up voltage, 230 V / 115 V 171 V / 85 V

Power Average Limiter (PAL) 2) 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