Wisdom Audio Sage Series L75 - Manual (Page 5)

5
Description
Your Sage L75 loudspeakers take advantage of several critical
technologies to deliver a level of performance that has never
been available in a loudspeaker that intruded so modestly on
your living space. In fact, this level of performance has rarely
been attained, regardless of the space and budget at one’s dis-
posal.
Since most of these technologies cannot readily be found else-
where, we will take the time to describe them in more detail
than would be necessary for more conventional designs.
Planar magnetic panels Our planar magnetic drivers use an advanced, thin film mem-
brane to move the air. This film can respond instantly to the
smallest detail in the signal. It has vastly less inertia than tradi-
tional “cone & dome” drivers, so the signal is never blurred in
any way.
The motive force is provided by a “voice coil” that is printed on
the film, which is suspended in a strong
magnetic field provided by neodymium
magnets behind and in front of the film. The
ratio of available force to the moving mass
is huge, which means that the diaphragm
does exactly what it is told; nothing more,
nothing less.
Free from compression One of the most remarkable things about the sound of well-designed planar
magnetic speakers is their lack of thermal or dynamic compression. There are
several reasons for this:
• The lightweight diaphragm responds quickly to even the smallest
signals, yet is robust enough to handle enormous ones.
• The fact that heat does not build up in the voice coil (as it does
in conventional dynamic drivers) means that the load seen by the
amplifier does not change at high power levels.
When you become accustomed to the sound of your new Sage L75 speakers,
conventional speakers sound a bit bland and lifeless.
More reliable The “voice coil” in the planar magnetic driver is spread out over a large, flat area
that is exposed to the open air. As such, when a huge transient comes along,
any heat that is generated is immediately dissipated. This compares quite favor-
ably to other designs in which the voice coil is buried inside a massive piece of
metal, where the heat has effectively no place to go.
The excellent heat dissipation of these drivers makes them remarkably reliable.
Planar magnetic speakers can handle a great deal of power without undue stress
or audible strain. In fact, for a given size, they can handle many times the power
of a traditional dynamic driver.