Based outside Turku, Finnish loudspeaker manufacturer Aura Audio Oy is using the
magic of Powersoft’s M-Force’s electromagnetic conversion principle to power its
XD30 subwoofer; this was pressed into action at the recent high profile Colors
dance festival at Kaapelitehdas, the former cable factory in Helsinki, with
devastating effect.
Aura Audio’s managing director, Mika Isotalo, explains that they worked closely with
rental company AMJ Turku Audio Oy, who equipped both the main and second
stages with Aura’s premier sound reinforcement systems.
M-Force first captured their imagination at its launch during Prolight+Sound 2013 in
Frankfurt. “We started working with it immediately, so that by Frankfurt this year
we were able to present our own M-Force product, the XD30 subwoofer,’ stated
Mika. At the same time the X-series amplifiers had been introduced.
Essentially, the M-Force is an innovative transducer based on a patented moving
magnet linear motor structure, offering unrivalled performance in terms of power
handling, electromagnetic conversion, reliability and maximum SPL when compared
to a conventional moving coil and cone arrangement.
Driven by the M-Drive amp module, the M-Force motor is the result of years of FEM
magnetic and mechanical simulations, while Powersoft’s Differential Pressure
Control (DPC) creates further performance enhancing active control.
“As a loudspeaker manufacturer focusing on acoustics and new loading techniques
we already had a new patented enclosure design which we had been using with
different cone drivers for several years. When we saw M-Force we immediately
thought it would be good for more compressed loading because of that huge motor
strength.
“A single XD30 is able to produce more than 150dB peak SPL in floor and we used
four of those in two by two end-fire configuration so we were hitting average of
140dB´s at 10m´s. Low frequency cut of is around 30Hz, but it does go lower than
that if necessary.’
So far the system has been heard by dance music aficionados at such events as
DBTL Festival in Turku, Helsinki Pride and Raumarock Festival in Rauma and others.
“The reaction from pretty much everyone has been one of positive surprise,’ says
Mika. “They have all been impressed by the size to SPL, the fast transient response
and effortless infra bass.’
