- 3 - way, 3 speaker
- Open baffle design
- 90 dB sensitivity
- Two finishes available
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Primary Drive Loudspeaker Coloration occurs when an audio signal is altered by
the device producing the signal. In practice, no loudspeaker is free of
coloration, but closed-box designs are particularly susceptible. Coloration is
caused by resonance and reflected sound within the cabinet.
It is usually tackled by making the box as rigid as possible, with a consequent
increase in weight and mass. Internal reflections are controlled by filling the
enclosure with an absorbent material like wool or fiberglass. These methods do
not eliminate coloration they merely place it below the musical signal, where it
is not particularly noticeable. Volumetric damping also reduces efficiency and
curtails the speaker's dynamic performance.. In phase-inversion systems, the box
is, in effect, tuned by the use of a tube or port. However, only a narrow band
of low frequencies is covered, and in effect, the low-frequency output from the
rear of the driver is added to that from the front.Transmission-line and horn
loading are also used, both of which require large enclosures. Horn loading is
used where high efficiency is required, but for acceptable low-frequency
results, the horn flare needs to be several feet across. Electrostatic
loudspeakers, which use a different principle of operation to moving-coil
devices, are often low in coloration, but they usually have low power handling,
poor efficiency, and have difficulty producing low frequencies.
An ideal loudspeaker would be of acceptable domestic size, and would have the
low coloration of electrostatic designs with the power handling and dynamic
qualities of the best moving-coil designs. Such a loudspeaker now exists! The
Primary Drive Loudspeaker is a plane wave propagator with a dipole polar
response. No damping material of any kind is employed. The Primary Drive uses
three moving-coil drivers, two of Primary Drive design plus a conventional dome
tweeter.
The drivers are mechanically isolated from each other, in three separate
modules. Power handling is 200 watts AES. Efficiency is 90dB (1w/1m). Because
the Primary Drive Loudspeaker has no panel or enclosure loading, it lacks box or
panel coloration. No reflected sound (other than that produced by the room) is
produced. The inherent smoothness of the system allows for the use of simple,
high-quality, high-power-handling series inductors and capacitors in the
crossover. Only three highly-rated crossover components are used.
The Primary Drive Loudspeaker is capable of producing high-definition, dynamic
bass at high sound-pressure levels. It is capable of reproducing the subtle
quality of the bass produced by many acoustic instruments. Many loudspeakers
generate extended bass, but do not allow the listener to determine the exact
nature of the instrument producing the bass. In the midrange�the most vital part
of the frequency spectrum the Primary Drive Loudspeaker utilizes a 5-inch,
studio-quality driver that covers the frequency range between 160Hz to 8kHz.This
wide range was chosen to ensure a seamless midrange presentation. The midrange
of the Primary Drive Loudspeaker is fast, uncolored, and tonally accurate.
Treble frequencies are handled by a high-quality dome tweeter loaded into a
diecast horn that extends the response to 25kHz. The Primary Drive Loudspeaker
retrieves a high level of information and produces excellent imagery. The
soundstage is projected to the rear of the speakers, with exceptional lateral
imagery and a solid, deep soundstage. The phase coherence of the system Ensures
that the image is very stable, within a wide listening area.
The Primary Drive Loudspeaker is available in two sizes. The smaller of the two
is suitable for small- to medium-sized rooms, the larger for medium- to
large-sized rooms. The midrange drivers and tweeters are identical in both
speakers, and the woofers are identical except for size (8-inch in the smaller
speaker and 10-inch in the larger) The Primary Drive Loudspeaker offers a unique
listening experience, with an unmatched combination of low coloration, high
power handling, high sensitivity, and exceptional imagery, detail, and dynamics.
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