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F-Series Amplifiers

FFA Class D technology


  • Power efficient and cool running
  • Lightweight
  • Analogue filter option card with limiter threshold delay ( only) (ideal for stage monitor systems)
  • Rugged tour class Aluminium construction
  • FFA class D technology
  • Side chain TCA clip limiter
  • Signal link through
  • Hand built and designed in England

  • New versions now available with built-in DSP


F Series amplifiers are made for Funktion One by English amplifier designers and manufacturers Full Fat Audio (FFA).  The three amplifiers in the range are the excellent high power F100-2 dual power supply amplifier (suited to driving 4 x 8 Ohm 21" drivers per channel at 2 Ohms) and two four-channel amplifiers (the F40Q and F60Q).  The 4 channel amplifiers are very useful for a wide variety of applications. All three amplifiers utilise rugged switch modulation power supplies (SMPS) with Class D Pulse Width Modulation amplifier stages.


Optional pre-set internal crossover cards can be ordered for specific multi-way applications as required.  The card preset specification includes bandpass crossover, relative gain, limiter and time alignment of low frequencies for all channels as well as a mono sum bass option. (It is not currently possible to time delay mid-high frequencies).  


F40Q Four Channel Amplifier:

Output power (Watts RMS) per channel

8Ω - 600W; 4Ω - 1000W  


F60Q Four Channel Amplifier:

Output power (Watts RMS) per channel

8Ω - 800W; 4Ω - 1500W  


F100-2 Two Channel Amplifier:

Output power (Watts RMS) per channel

8Ω - 1500W; 4Ω - 3000W; 2Ω - 5000W


Other FFA amplifiers can be supplied on request


Technical Specifications  

Gain: 32dB

THD: Typical 0.05% @ 4Ohm, 1kHz THD+N  

Frequency Response: 20Hz - 20kHz ±0.5dB

Controls: 40 point potentiometer per channel, power on switch  

Indicators: signal green = -20dB, signal yellow = -3dB, red signal = clip, signal red protect = over current, low AC mains or 3 sec. mute on power up

Load Protection: DC on output, side chain TCA clip limiter circuit

Amplifier Protection: Short circuit, current overload, thermal shutdown, high frequency stability circuit  

Audio Signal Inputs: Balanced Neutrik® Female XLR input connected Pin 1 - GND, Pin 2 - Hot, Pin 3 - Cold, XLR Male signal throughout each channel

Audio Signal Outputs: Neutrik® speakON each channel. Channels 1 & 3 output speakON utilises 2+ and 2- connection to allow use of 4 core loudspeaker cable for bi amp loudspeaker system, for example stage monitor system.  

Power Requirement: 1 x Neutrik® 20A powerCON connector, 2 x 16A 240V VAC circuit. Power range 185V-240V AC  

System Cooling: High CFM 80mm fan with proportional signal speed control. Rear to front airflow.


Dimensions: 483mm x 510mm x 88mm. Includes rear rack support. 19'' rack mount enclosure

Weight: 9kg (F40Q & F60Q); 12kg (F100-2)


N.B. Please note that the F-Series amplifiers have an opposite airflow to that of the E-Series amplifiers and therefore, when used together in a rack it is advisable to place the F-Series at the top of the rack.

Links to control software download for amplifiers with built-in DSP:


For Windows 32 bit systems >>
For Windows 64 bit systems: >>
For MAC OS >>
Contains ALL versions, plus supporting documentation and autostart feature with auto32/64 bit system detection

Technical Drawings:

F-Series Amplifiers Technical Drawing
All dimensions in mm and inches © Copyright Funktion One Research Ltd 2009 - 2024

Downloadable Files:

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