FFA power amplifiers use our now proven and reliable high frequency switch modulation power supply (SMPS). This type of power supply technology is space saving and also light weight. SMPS offer lower power consumption compared to traditional low frequency power supply technologies. Our rugged SMPS is specified with massive bulk storage capacitance to ensure no drop in audio performance especially when tasked to drive high current 2 Ohm loads.

Our ‘bass engines’ the FFA-6000, FFA- 8000 and FFA-10000 feature dual independent SMPS. These amplifiers are especially suited to the most demanding bass applications. We believe the dual mono approach is the best way to achieve ultimate bass performance.

FFA Class D Pulse width modulation (PWM) amplifiers convert mains power highly efficiently and are the ideal partner for our power supply. The amplifier stage produces far less wasted heat than a conventional power amplifier so does not require massive heat sinking and a large bulky supporting chassis. Our SMPS uses a high frequency foil wound transformer which still allows high current demands but is vastly smaller than a traditional low frequency transformer. We design our amplifiers with the knowledge and experience that they will be used in high thermal conditions and the most demanding environments. FFA amplifiers are compact power packs with rugged mechanical construction to protect the electronics to ensure long service. Our amplifier output stage uses the state of the art MOSFET power devices which reliably and efficiently ensure high current on demand. Our careful consideration to circuit design ensures high quality sound amplification.


Funktion One are English inventors and manufacturers of professional loudspeaker systems.

Achieving the best possible audio quality is the principle motivating factor at Funktion One. We are intent on sonic accuracy and our technological approach avoids the use of both system EQ (with its inherent phase and headroom problems) and compression driver mid-range (with its inherent harshness and distortion). Our loudspeaker systems also have excellent directional control allowing sound to be focused where it’s needed and minimising out-of-venue environmental impact.


Superior system processing from England. Excellent audio quality coupled with powerful software solutions.

In 2014, A world-class team of experienced industry professionals joined forces – long time audio software and design engineer, Dan Cartman; industry legend and co-founder of XTA Electronics, Andrew Grayland, and live-sound engineer and systems expert, Phil Key, to form NST AUDIO Ltd.

With expertise and knowledge developed over decades of experience in pro-audio at the highest level, NST AUDIO has world-class audio electronic designers, software developers, live-sound engineers, expert management and superior product support on-board.

The flagship D48S offers flexible 4×8 routing with  compressors, 6 bands of parametric EQ, a 28 band graphic EQ, 3 bands of dynamic EQ and up to 1.3 seconds of delay available on every input. Every output channel has high and low pass filters, 10 bands of parametric EQ and up to 1.3 seconds of delay.

D-Net Ethernet control software allows convenient control of all parameters via iPad, Mac and PC.


Founder of Quested Monitors Roger Quested started out as an assistant engineer at Olympic Studios in the 1960’s. After years recording with seminal artists like The Rolling Stones, Led Zeppelin, Pink Floyd, Cat Stevens, John Denver and The Kinks, to name but a few, Quested decided to build true reference monitors for the studio he was working in at the time.

Quested Monitoring Systems was hence founded in 1985. With more than 30 years of manufacturing under his belt, Quested maintains the same ethos to building monitoring systems to this day: clear, natural sounding reference monitors of simple design, using sound volumetric and stereo-imaging principles and only top quality components. The idea being to reproduce such a natural soundstage as to allow the monitors to ‘disappear’.

Stalwart users of Quested monitors include Hans Zimmer, who formed a relationship with Roger in 1986 during the building of his Lillie Yard studio. Studios like Sarm (Trevor Horn) and Abbey Road Studios have also had a long association with Quested monitors, being continually praised by many top engineers as their “go to” monitors for mixing. Thanks to their continued high standard of build quality, natural frequency response and a tendency to outperform even larger monitors in their clarity and wide dynamic range.