Lab Gruppen fP 3400

Lab Gruppen fP 3400
fP 3400Lab Gruppen fP 3400Lab Gruppen fP 3400 rearThis gear is assigned to one of our Full Professional P.A. Rental systems. For more information on our Systems Rental, call us @ 210 521-8921.
VTC Logo

Lab Gruppen fP 3400

Overall efficiency and heat dissipation always have been fundamental problems in extremely high power amplifiers such as the fP 3400. As early as 1990, Lab.gruppen had achieved a breakthrough with a patented a high efficiency amplifier that represented a major evolution beyond typical Class D approaches. Designated Class TD®, this technology obtains the same high efficiency as Class D, but avoids the inherent drawbacks. For example, a typical Class D topology employs Pulse Width Modulation (PWM) to achieve high efficiency, but this requires a steep recovery filter between the output stage and the loudspeaker. In contrast, Lab.gruppen’s Class TD design keeps the audio signal within the analog domain, eliminating the need for filtering and therefore offering the same sonic quality as a traditional Class AB amplifier.

In addition to traditionally superb Lab.gruppen sonic performance, fP 3400 offers a full line of important features: Regulated Switch Mode Power Supply (R.SMPS™)

Switch-mode amplifiers are commonplace in today’s amplifier market. However, Lab.gruppen’s unique Regulated Switch-mode Power Supply (R.SMPS) technology offers a number of essential advantages that make it superior to other, seemingly similar power supply designs. The most important features are the precise regulation and the extreme power efficiency. The regulated power supply easily deals with high variations 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 affecting audio performance. The power supply is also exceptionally efficient, with only a fraction of the energy from the AC mains is turned into heat. A regulated power supply also affords other sonic advantages, including better cone control while retaining the same fast response as a conventional power supply.


Number of input channels 2
Number of output channels 2
Peak output voltage 132 V
8 ohms load 91 Vrms
Max output power (all channels driven)
8 ohms 1 1100 W
4 ohms 1 1500 W
4 ohms 2 1900 W
2 ohms 1 1700 W
Max output power bridged
8 ohms 3000 W
8 ohms 2 3000 W
4 ohms 3400 W
THD + N 20 Hz – 20 kHz for 1 W 0.08 %
THD + N at 1 kHz and 1 dB below clipping 0.03 %
DIM 30 at 3 dB below clipping 0.06 %
Hum and noise < -110 dB
Channel separation at 10 kHz 70 dB
Slew rate 20 V/μsec
Common mode rejection 50 dB
Connectors and Buttons
Gain selectable [dB] 5) 3 20, 23, 26, 29, 32, 35, 38, 41
Gain controls 31 pos detent
Clip Red LED
Output headroom indicators 5 green LED’s
VHF Yellow LED
Input redundancy / Matrix Automatic 4 level input redundancy / 4 input mixers
Back panel user interface
Inputs Neutrik Combo
Link connectors XLR male
Clip limiters On/Off, each ch.
MLS switch [dB] 0, -2, -4, -5
corresponding to [Vrms] 91, 75, 58, 52
when bridged [Vrms] 182, 150, 116, 104
Link switch Ch. A-B
Operating voltage 130-265V/65-135V
Soft start / Inrush power Yes / max. 5 A
Full output power at 4 ohms, 230V/115V 180-265V/90-130V
Minimum start-up voltage, 230V/115V 175V/95V
230 V or 115 V versions Yes
Current draw at 4 ohms and 230V/115V
Idle, no load at output 1.0/2.0 Arms
1/8 of full power (-9 dB) 5/10 Arms
1/3 of full power (-5 dB) 11/22 Arms
Dimensions W: 483 mm (19”), H:88 mm (2 U), D: 347 mm (13.7”)
Approvals CE: Immunity: EN 55 103-2, E3, with S/N below 1 % at normal operation level Safety: EN 60 065, class 1 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

pdf icon
User Manual