
C
erious
echnologies
T
C
erious One
Monitors
T
echnology Serving Music...

The Story
Carbon fiber, Kevlar, ballistic ceramic, stainless steel, aerospace aluminum,
high density fiber board, phenolic sheet, reactive ballistic fluid, select
hardwoods and eight different adhesives may seem a little bit outrageous
when contemplating the design and construction of a loudspeaker cabinet.
Until you hear the loudspeaker...
Modern loudspeaker design suffers from many ill-conceived notions of the
actual function a cabinet serves. In simplistic terms, the cabinet must
dissipate the rear wave energy created by the back of individual driver
cones and not allow it to interfere with the front wave - which we do desire
to hear. It is common knowledge that the cabinet must, therefore, be
totally rigid and inert so it may not impart any character of its own upon the
final sonic event. In other words, we must have an enclosure that is capable of dissipating a tremendous
amount of energy, while engineered to be unaffected by any acoustic input. This is like defining an
airplane as something that must fly, yet must never be allowed to become airborne.
If we take the concept of our rigid enclosure to its most effective end, then clearly the only element
about our enclosure that will be an active absorber of sound will be how much foam or batting we can
stuff inside. We understand the effectiveness of these elements through the design and execution of
anechoic chambers, rooms that are designed to absorb reflected sound (as in our enclosure). The
world s largest anechoic chamber is the size of a large gymnasium, with foam wedges that are 15 feet
in depth. It effectively absorbs soundwaves down to 70 Hz. We must now ask if those that design these
chambers are simply incompetent, as they require vast buildings filled with 15 foot deep wedges to
merely achieve results to 70 Hz, or if today s loudspeakers designers are ingenious enough to build an
enclosure the size of a shoe box stuffed with small amounts of foam and effectively dissipate energy in a
linear manner to 20 Hz?
Stainless steel tubes dissipate
midrange energy.
Einstein postulates that energy cannot be created or destroyed (which leads us to ponder if he ever
drank coffee or had children...). Where does the unabsorbed energy go? Sadly, it comes back out
through the cone. Most cone materials are ineffective sound barriers. They are designed to
sound,
not block
it. How do we go about designing an enclosure with the proper design elements?
create
First we must pursue a practical application of the intended purpose. Much like a heat sink is designed
to draw heat away from an amplifier and dissipate it, our enclosure must be an
energy sink
, drawing
away the rear energy and dissipating it before it can reflect back to our drivers. Our enclosure must do
this while not adding its own sonic characteristics. No naturally occurring material possesses these
attributes. Our only answer is to create unique materials specifically designed to have properties that will
most effectively address these needs. It is here that the resources of Cerious Technologies come into
play.
To understand what must be designed we must know what actually occurs inside the enclosure.
NASA has long modeled solar and light energy as
energy plasma
, as it contains both particle and
wave characteristics. Sophisticated plasma modeling revealed how energy is transferred throughout our
enclosure, and how to best address its containment and dissipation.