Lab Gruppen FP2400Q Quick Start Guide

POWER AMPLIFIER

fP 2400Q

KEY FEATURES:

4 ✕ 370 watts @ 8 Ω
4 ✕ 380 watts @ 4 Ω
4 ✕ 500 watts @ 2 Ω

(Measured just below clip level,
with all 4 channels driven)

◆ Compact design, 2U high

◆ Low weight, 8 kg (18 lbs)

◆ MLS™ Switch: Lab.gruppen’s

unique power matching for
different loads

NEW FEATURES:

◆ Easily accessible dust filters

◆ Improved low-end power

bandwidth

◆ Extruded front panel for

increased stability

The fP 2400Q is a lightweight and space-saving power amplifier, ideal for use in high
quality touring sound systems as well as in demanding permanent installations.

The fP 2400Q offers a choice of applications, such as in multi-channel monitor systems,
four-channel reproduction and compact amplification in active 2-, 3-, and 4-way systems.
The fP 2400Q gives the possibility to bridge connect 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 different 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 capability. Two easily accessible dust filters on the front ensure a clean front-to­rear airflow.

A new Bi-phase wiring scheme also increases the capacity of the switch mode power supp­ply. This extends the power bandwidth in the low end.

Besides the traditionally superb Lab.gruppen sonic performance, there is a full line of fea­tures to make the fP family functional in all situations from installation to high performance
live sound systems:

Regulated switch mode power supply

Today there are many lightweight, switch-mode amplifiers in the market. However, 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 (90 V) instead of 230 V (115 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-musi-

cal 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.

SPECIFICATIONS

fP 2400Q

Max output power

1)

EIA EIA FTC
EIA at 1 kHz and 1% THD 20–20 kHz at 0.1% THD
MLS-switch –3 dB 0 dB Full 0 dB Full

16 Ω four channels 95 W 200 W 180 W
8 Ω four channels 200 W 370 W 360 W

2)

4 Ω four channels 380 W 590

2)

2 Ω four channels 500

3)

, 650

WN/AN/A

3)

, 700

W 530 W

16 Ω bridged stereo 380 W 740 W 720 W

2)

8 Ω bridged stereo 760 W 1200

2)

4 Ω bridged stereo 1000

3)

, 1280

WN/AN/A

3)

, 1400

W 1000 W

Max output voltage

8 ohms load, MLS @ 0 dB 40 Vrms 54 Vrms
Peak voltage, no load 60 V 81 V

Distortion etc.

THD 20 Hz–20 kHz and 1 W to full power 0.07 %
THD @ 1 kHZ and –1 dB under clip 0.02 %
DIM 30 at –3 dB under clip 0.008 %

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 200 V–265 V AC 100 V–130 V AC

Hum and Noise <–107 dB

Peak inrush current
(Soft start limited) 5 A 5 A

Channel separation @10 kHz 70 dB

Current Draw @ 4ohms&230V

Output impedance 30 mΩ

Quiescent power (no load) 1.4 Arms 2.8 Arms
1/8 of full power (–9 dB) 6 Arms 12 Arms

Slew Rate 60 V/␮s

1/3 of full power (–5 dB) 9 Arms 18 Arms
At full power (0 dB)

Inputs

@1 kHz 1% THD 16 Arms 32 Arms
Gain 32 dB
Impedance 20 kohm
Common mode rejection 50 dB

Net Dimensions

mm 483 (19˝) W ✕ 88 H ✕ 316D

inch 19˝ W ✕ 3.5˝ H ✕ 12.4˝ D

Front Panel

Gain controls (4) channel A, B, C, D 31 positions

detent

Clip Indicator (4) red LEDs

Shipping Dimensions

mm 560 W ✕ 180 H ✕ 500 D

inch 22˝ W ✕ 7.1˝ H ✕ 19.7˝D

Output headroom

indicators (4 ✕ 2) green LEDs Fast peak

–slow release
Protect indicator (4) yellow LEDs 80°C at heatsink or

Weight

Net 8.6 kg (19 lbs)

Shipping 10.2 kg (22.5 lbs)

>12 kHz 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

and 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-switches A+B / B+C / C+D

Approvals

CE:

Emission EN 55 103-1, E3

Immunity EN 55 103-2, E3, with S/N below 1% at normal operation level

Safety EN 60065, class I

ETL listed: Conforms to ANSI/UL STD 6500 and Certified to CAN/CSA E60065-00

FCC: Complies with Class B digital device, Part 15 of the FCC Rules.

NOTES:

1) Specifications measured with 230 V AC

2) Component tolerance dependent

3) Continuous power, one channel driven or peak power both channels driven
(Thermal protection may occur at high continuous power)

4) Normal operation level 1/8 of full power or –9 dB below clip level.

Lab.gruppen reserve the right to alter functions or the specification without prior
notice.

4)

Lab.gruppen AB, Gullregnsvägen 16, SE-434 44 Kungsbacka, Sweden.

Tel [phone] Fax [phone] e-mail: [e-mail] www.labgruppen.com