Lab Gruppen amplifiers are engineered to amazing levels of sonic quality, performance, and reliability.

The fP 2400Q is a lightweight and space-saving four-channel power amplifier, ideal for use in high quality touring sound systems as well as in demanding permanent installations. The fP 2400Q offers a diverse choice of applications, such as: multi-channel monitor systems, four-channel reproduction, and compact amplification in active 2-, 3-, and 4-way systems. The fP 2400Q makes possible the bridge connection of one or two of the two pairs of channels (channel A and B and/or channel C and D). It also features Lab.gruppen's unique power matching solution, the MLS switch, which offers endless combinations for solving most of the problems related to varying impedances and maximum power capacities of loudspeakers. The latest semiconductor technology is utilized in the new ferrite Power (fP) amplifiers. This, together with Lab.gruppen's proprietary copper cooling system, Intercooler, enhances the 2 ohms capacity. Two easily accessible dust filters on the front ensure a clean front-to-rear airflow. Additionally, a new Bi-phase wiring scheme also increases the capacity of the switch mode power supply. This extends the power bandwidth in the low end.

Regulated switch mode power supply
The unique Lab.gruppen switch-mode power supply technology offers a number of essential advantages that make it superior to other and seemingly similar power supply designs. The most important features are the regulated power supply and the extreme power efficiency. The regulated power supply easily deals with a very high variation in the AC mains voltage: it can drop by up to 20% below its nominal level — e.g. to 180 V instead of 230 V — without any problem. Perhaps even greater benefits result from the extreme efficiency of Lab.gruppen amplifiers: only a fraction of the energy from the AC mains is turned into heat. A regulated power supply also presents some other sonic advantages, such as better cone control and the same fast response as a conventional power supply.

Sophisticated protection circuitry, combining:
- ALS short circuit protection; the Adaptive Limiting System permits very high peak currents, but keeps the amplifier within the Safe Operation Area

- DC protection: protects against infrasonic signals

- VHF protection: protects the loudspeakers against strong very high frequency non-musical signals above the audible range - Thermal protection: prevents the amplifier from being overheated. The protection indicators on the front panel are switched on, as a warning, before the protection process is initiated. - AC protection: shuts down the power supply if the line voltage is outside the operating voltage - Clip limiter: prevents severely clipped waveforms from reaching the loudspeakers, whilst maintaining full peak power

Lab Gruppen FP 2400Q 4-Channel Power Amplifier Features:

4 x 370 watts @ 8 Ohms
4 x 380 watts @ 4 Ohms
4 x 500 watts @ 2 Ohms
(Measured just below clip level, with both channels driven)
Compact design, 2U high
Low weight, 8.6 kg (19 lbs)
Intercooler cooling system with front-to-rear airflow
MLS Switch: Lab.gruppen's unique power matching for different loads
Easily accessable dust filters
Improved low-end power bandwidth
Extruded front panel for increased stability

Lab Gruppen FP 2400Q 4-Channel Power Amplifier Specifications:

MAX OUTPUT POWER 1)
EIA at 1 kHz and 1% THD: FTC 20-20kHz @0.1%THD
MLS switch: -3 dB 0 dB Full 0 dB Full
16 ohms four channels: 95W, 200W, 180W
8 ohms four channels: 200W, 370W, 360W
4 ohms four channels: 380W, 590 2), 700 3)W, 530W
2 ohms four channels: 500 2), 650 3)W, N/A, N/A
16 ohms bridged stereo:380W, 740W, 720W
8 ohms bridged stereo: 760W, 1200 2), 1400 3)W, 1000W
4 ohms bridged stereo: 1000 2), 1280 3)W, N/A, N/A
Max output voltage:
8 ohms load: 40Vrms, 54Vrms
Peak voltage, no load: 60V, 81V
Distortion etc.:
THD 20Hz-20kHz and 1W to full power:0.07 %THD @ 1kHZ and —1dB
Under clip: 0.02 %
DIM 30 at —3dB under clip: 0.008 %
Hum and Noise: <-110 dB
Channel separation @10kHz: 70 dB
Output impedance: 30 Ohms
Slew Rate: 60 V/æs
Inputs:
Gain:32 dB
Impedance: 20 kohm
Common mode rejection: 50 dB
Front Panel:
Gain controls: (4) channel A, B, C, D 31 pos detent
Clip Indicator: (4) red LEDs
Output headroom indicators: (4x2) green, LED's Fast peak —slow release
Protect Indicator: (4) yellow LEDs 80øC at heatsink or >12Hz at full power or shorted output
On Indicator: (4) green LEDs, DC rail voltage for channel A, B, C and D
Rear Panel:
Input connectors: (4) Neutrik Combo XLR type, 3 pin & 1/4" jack
Output connectors: (4) Neutrik 4-pole Speakon connectors
Switches:
Clip limiter A and B: On-Off (switchable)
MLS switch: 0, -3 dB
Link-switch: A+B / B+C / C+D
Power: 230V version, 115V version
Operation voltage: 130V-265V, AC 65V — 135V AC
Minimum start voltage: 175V, 95V AC
Full output power at 4ohms: 200V-265V, AC: 100 V — 130 V AC
Peak inrush current (Soft start limited): 5A. 5A
Current Draw @ 4ohms & 230V
Quiescent power (no load): 1.4 Arms, 2.8 Arms
1/8 of full power (-9dB): 6 Arms, 12 Arms
1/3 of full power (-5dB):9 Arms, 18 Arms
At full power (0 dB) @1 kHz 1% THD: 16 Arms, 32 Arms
Net Dimensions mm (inch): 483 (19") W x 88 (3,5") H x 316 (12,4") D
Shipping Dimensions mm (inch):560 (22") W x 180 (7.1") H x 500 (19.7") D
Net Weight:8.6 kg (19 lbs)
Shipping Weight: 10.2 kg (22.5 lbs)

Max output voltage
8 ohms load, MLS @ 0 dB 53 Vrms
Peak voltage, no load 77 V
Distortion etc.
THD 20Hz-20kHz and 1W to full power 0.3 %
THD @ 1kHZ and —1dB under clip 0.01 % 0.0006%
DIM 30 at —3dB under clip 0.008%

Hum and Noise <—110 dB

Channel separation @10kHz 70 dB

Output impedance 30m Ohms

Slew Rate 40 V/s

Inputs
Gain, selectable [dB] 20,23,26,29,32,35,38,41
Impedance 20 kohm
Common mode rejection 50 dB

Front Panel
Gain controls (2) channel A,B 31 pos detent
Clip Indicator (2) red LEDs
Output headroom indicators (10) green LEDs Fast peak — slow release
Temp Indicator (2) yellow LEDs 80 degree C at heatsink
Protect indicator (2) yellow LEDs >12 kHz at full power or shorted output
On Indicator (2) green LEDs DC rail voltage for channel A and B

Rear Panel
Input connectors (2) Neutrik Combo XLR type, 3 pin
and 1/4 "jack
Link connector (2) XLR type, 3 pin male
Output connectors (2) Neutrik 4-pole Speakon connectors
Switches:
Clip limiter A and B On—Off(switchable)
Link-switch Ch.A—B

Power 230 V version 115 V version
Operation voltage 130 V—265 V AC 65 V—135 V AC
Minimum start voltage 175 V 85 V AC
Full output power at 4 ohms 180 V—265 V AC 90 V—130 V AC
Peak inrush current (Soft start limited) 5 A 5 A

Current Draw @ 4ohms
Quiescent power (no load) 0.9 Arms 1.8 Arms
1/8 offull power (—9 dB) 5 Arms 10 Arms
1/3 offull power (—5 dB) 8 Arms 16 Arms
At full power (0 dB) 14 Arms 28 Arms

Net Dimensions
mm 483 W x 88 H x 287 D
inch 19" W X 3.5" H x 11.3"D
Shipping Dimensions
mm 560 W x 180 H x 500 D
22" W x 7.1"H x 19.7 "D
Weight
Net 7.9kg (17lbs)
Shipping 9.6 kg (21.2 lbs)