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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.


The F40Q and F60Q are also avaliable with internal DSP. Networking, four inputs and six outputs (four via amplifier channels and two via additional signal channels) and intuative software offer great flexability and control.


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 - 2019

Downloadable Files:

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