has developed a range of high quality, cylindrical loudspeakers
that are omni-directional in operation and exhibit very low
sound colouration even at high acoustic levels. The virtues
inherent in their design result in a considerable increase in
the perception and enjoyment of live and recorded music.
Several models are
available, each suited to a different purpose or environment
- Hi-fi in the pool house or outside on the patio, musical instrument
reproduction, discotheques, public address or even acoustical
Ranging from compact
units designed for use in small rooms such as saunas, to monsters
using 24" diameter drivers rated at 2,000 watts aimed at
the modern music venue. All models exhibit amazing electro-acoustic
efficiencies of up to 101dB/W and even the domestic versions
are capable of "disco level" should anyone require
The common feature
of all the designs is the operational principle (the subject
of a patent application) combined with some of the finest drivers
These are the
first loudspeakers in the world which are omni-directional and
By very careful design,
the stuctural-mode resonances of the cabinet and the air-mode
resonances inside the cabinet are both suppressed, preventing
the the colouration of the reproduced sound that is inevitable
with all conventional "box" loudspeakers - even those
using advanced aero-space type materials in their construction
aimed at preventing cabinet resonance.
The enclosure provides
optimum loading for th edrivers and enables exceptionaly fast
attack and decay therby enhancing all types of reproduced music.
It is this feature that accounts for the uncanny "disapearance"
of the loudspeakers from the acoustic sound field during operation
the total lack of listener fatigue.
The design simulates
a point source over a wide frequency range covering a full 360
degree about the vertical axis and +/-120 degrees about the
horizontal plane through the simulated source. This eliminates
the "armchair effect" that conventional loudspeakers
exhibit, where only one listener is able to experience good
stereo at the mid-point between the loudspeakers. A stereo sound
field exists over a very wide area and some truly amazing stereo
imaging in free space results from the use of four units running
in "crossed stereo" mode.
loudspeakers generally rely an tuned ports to augment the acoustic
output of the bass driverby providing an oscillating "slug"
of air. This is very carefully arranged to have a neutral oscillation
frequency just below that of the driver, thus, as the output
energy from the bass driver is falling, the output energy from
the port is rising. Some recent so called "sub-bass"
designs use several "chambers" and adjustable tube
ports to provide additional resonant sections in an attempt
to extend the response down even further in frequency and flatten
out the acoustic energy. The point about these techniques is
that, whilst they unboubghtably increase bass energy output,
they do so at the expense of detail. In no way can any of these
units be discribed as Hi-Fi wiith regard to reproduction of
A simple analogy
that can be used to illustrate this effect, is that of air oscilating
in a bottle. As most people know, by blowing across the open
end of a bottle a resonant note is generated, this tends to
take a short while to actualy "build up" and it continues
sounding for quite some time even after the energy input, (i.e.
the blowing) has ceased.
In a working loudspeaker
this reasults in lost detail, since the initial transients present
in a bass "event", such as a drum beat, are largely
lost whilst the resonance is growing aand then furthe obscured
because the system carries on chucking out bass energy long
after the electrical input to the driver has ceased for the
event in question.
SIMILAR TO TURBO LAG******************
We have gone on about
the above at some length in order to emphises our belief that
both domestic and proffesional loudspeaker design has gone down
a blind alley of late, reasulting in designs that, whilst being
compact, are "woolly" sounding at the bottom end and
tiresome to listen to for any length of time.