Lab.gruppen fP Series FP 3400 User manual

POWER AMPLIFIER
KEY FEATURES:
2 ✕1100 watts @ 8 Ω
2 ✕1500 watts @ 4 Ω
2 ✕1700 watts @ 2 Ω
(Measured just below clip level,
with both channels driven)
◆Compact design, 2U high
◆Low weight, 10 kg (22 lbs)
◆MLS™ Switch: Lab.gruppen’s
unique power matching for
different loads
NEW FEATURES:
◆Multiple positions gain switch
◆Intercooler®cooling system
with front-to-rear airflow and
easily accessible dust filters
◆Improved low-end power
bandwidth
◆Link connector with XLR-type
connector
◆Bridged mono outputs in one
Speakon®connector
◆Extruded front panel for
increased stability
The fP 3400 is a lightweight and space-saving power amplifier, ideal for use in
high quality touring sound systems as well as in demanding permanent installa-
tions
Heat and cooling are fundamental problems in extremely high powered amplifiers such as
the fP 3400. In 1990, Lab.gruppen patented a high efficiency amplifier, in fact an evolution
of the Class D amplifier. Lab.gruppen therefore call it Class TD. It attains the same high
efficiency as Class D, but avoids its drawbacks. Class D has a power-amplifier topology
using Pulse Width Modulation (PWM) to achieve high efficiency, but it needs a recovery
filter between the output stage and the loudspeaker. Lab.gruppen’s Class TD amplifiers do
not need this filter and this is one reason why the Lab.gruppen Class TD obtains the same
sonic quality as a traditional Class AB amplifier.
Besides the traditionally superb Lab.gruppen sonic performance, fP3400 offers a full
line of important features:
Regulated switch mode power supply
Today there are many lightweight, switch-mode amplifiers on the market. However, the
unique Lab.gruppen switch-mode power supply technology offers a number of essential
advantages that make it superior to other 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.
Multiple positions Gain switch
To meet the demands for a flexible gain structure in the system, Lab.gruppen offers a
multiple position gain DIP switch. The maximum amplifier gain can be set to all industry
standards: 20, 23, 26, 29, 32, 35, 38 and 41 dB.
Sophisticated protection circuitry, combining:
– 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.
fP 3400

SPECIFICATIONS
Lab.gruppen AB, Gullregnsvägen 16, SE-434 44 Kungsbacka, Sweden.
Tel [phone] Fax [phone] e-mail: [email protected] www.labgruppen.com
Max output power 1) EIA EIA EIA EIA FTC
EIA at 1 kHz and 1% THD 20–20 kHz at 0.1% THD
MLS-switch –5 dB –4 dB –2 dB 0 dB Full 0 dB Full
16 Ωper channel 160 W 200 W 340 W 520 W 500 W
8 Ωper channel 300 W 400 W 700 W 1100 W 1000 W
4 Ωper channel 600 W 750 W 1300 W 1500, 19003) W 1450 W
2 Ωper channel 1200 W 1400 W 1550, 19003) W 17002), 30003) W 1650 W
16 Ωbridged 600 W 800 W 1400 W 2200 W 2000 W
8 Ωbridged 1200 W 1500 W 2600 W 3000, 38003) W 2900 W
4 Ωbridged 2400 W 2800 W 3100, 38003) W 34002), 60003) W 3300 W
Max output voltage
8 ohms load, MLS @ 0 dB 52 Vrms 58 Vrms 75 Vrms 94 Vrms
Peak voltage, no load 79 V 82 V 107 V 132 V
fP 3400
Distortion etc.
THD 20 Hz-20 kHz and 1 W to full power 0.08 %
THD @ 1 kHZ and –1 dB under clip 0.03 %
DIM 30 at –3 dB under clip 0.06 %
Hum and Noise <–110 dB
Channel separation @10 kHz 70 dB
Output impedance 60 mΩ
Slew Rate 20 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°C at heatsink
VHF indicator (2) yellow LEDs >12 kHz at full power
On Indicator (2) green LEDs DC rail voltage for
channel A and B
AC Indicator (1) green LED AC power present
AFS Indicator (1) green LED Fuse saver activated
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)
MLS switch 0, –2, –4, –5 dB
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) 1 Arms 2 Arms
1/8 of full power (–9 dB) 5 Arms 10 Arms
1/3 of full power (–5 dB) 11 Arms 22 Arms
At full power (0 dB)
@1 kHz 1% THD 26 Arms 52 Arms
Net Dimensions
mm 483 (19˝) W ✕88 H ✕347 D
inch 19˝ W ✕3.5˝ H ✕13.7˝D
Shipping Dimensions
mm 560 W ✕180 H ✕500 D
inch 22˝ W ✕7.1˝ H ✕19.7˝D
Weight
Net 10 kg (22 lbs)
Shipping 11.6 kg (25.6 lbs)
Approvals
CE:
Emission EN 55 103-1, E3
Immunity EN 55 103-2, E3, with S/N below 1% at normal operation level4)
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.