Pro Audio Systems

• Technical Specifications

• MAX OUTPUT POWER 1)
• EIA at 1 kHz and 1% THD FTC 20-20kHz @0.1%THD
• MLS switch -5 dB -4 dB -2 dB 0 dB Full 0 dB Full
• 16 Ω per channel 220 W 260 W 410 W 650 W 640 W
• 8 Ω per channel 430 W 520 W 820 W 1300 W 1280 W
• 4 Ω per channel 830 W 1000 W 1600 W 2300 W 2200 W
• 2 Ω per channel 1660 W 2000 W 2400, 3050 3) W 2900 2), 3200 3)W 2500 W
• 16 Ω bridged 860 W 1040 W 1640 W 2600 W 2500 W
• 8 Ω bridged 1660 W 2000 W 3200 W 4600 W 4400 W
• 4 Ω bridged 3400 W 4000 W 4800, 6100 3) W 5800 2), 6400 3) W 5000 W
• Max output voltage
• 8 ohms load 62 Vrms 70 Vrms 85 Vrms 104 Vrms
• Peak voltage, no load 88 V 101 V 121 V 149 V
• Distortion etc.
• THD 20Hz-20kHz
• and 1W to full power 0,1 %
• THD @ 1kHZ and –1dB
• under clip 0,04 %
• DIM 30 at –3dB under clip 0,06 %
• Hum and Noise <-110 dB
• Channel separation @10kHz 70 dB
• Output impedance 60 mΩ
• Slew Rate 20 V/µs
• 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 LED’s Fast peak –slow release
• Temp Indicator (2) yellow LEDs 80°C at heatsink
• VHF indicator (2) yellow LEDs <12kHz 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 & 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, -5dB
• 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 95 V AC
• Full output power at 4ohms 180 V-265 V AC 90 V – 130 V AC
• Peak inrush current (Soft start limited) 5 A 5 A
• Current Draw @ 4ohms & 230V
• Quiescent power (no load) 1 Arms 2 Arms
• 1/8 of full power (-9dB) 6 Arms 12 Arms
• 1/3 of full power (-5dB) 14 Arms 28 Arms
• At full power (0 dB) @1 kHz 1% THD 20 Arms (AFS limited) 40 Arms (AFS limited)
• Net Dimensions mm (inch) 483 (19”) W x 88 (3,5”) H x 347 (13,7”) D
• Shipping Dimensions mm (inch) 560 (22”) W x 180 (7.1”) H x 500 (19.7”) D
• Net Weight 10 kg (22lbs)
• Shipping Weight 11.6 kg (25.6lbs)
• 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 60 065, class I

• Features

• The fP 6400 is a lightweight and space-saving power amplifier,
  
• Heat and cooling are fundamental problems in extreme high power amplifiers such as the fP 6400. Already 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 obtains 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, fP6400 offers a full line of important features:
  
• 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 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.
  
• Multiple positions Gain switch
  
• To meet the demands for a flexible gain structure in the system, Lab.gruppen offers a multiple position gain 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.

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