Velodyne DF-12sc - Manual (Page 5)

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The Velodyne Story . . .
Founded in 1983 by David Hall,
Velodyne Acoustics is the result of an
effort to bring the discipline of me-
chanical engineering and the doctrine
of common sense to the field of high
performance audio- the Silicon Valley
approach to sound.
Through innovative thinking and
inventive design, the company pio-
neered the first true servo-controlled
subwoofers. The result was both the
reference standard for bass repro-
duction and the foundation for distor-
tion-free listening.
Rejecting the trend toward high-end
indulgence or fancy marketing gim-
micks with no relevance to improving
sound, Velodyne devoted its techni-
cal resources to bringing the benefits
of ultra-low distortion technology
within the reach of all dedicated
music lovers. In fact, many state of
the art recording studios & homes
now feature Velodyne subwoofers as
their "reference standard" by which
all others should be judged.
With the introduction of Velodyne's
Distortion Free Series for the automo-
bile, listeners finally have access to
all the details and dynamics that
make up the modern listening experi-
ence. Anything imperfect originates
elsewhere. By design, Velodyne
speakers are incapable of error.
to the amplifier. Forcing the speaker's acoustical output into a true
representation of the music.
The term "servo" is misused by some manufacturers who use a
different motor on their speakers to try and make woofers sound like
larger more powerful units. Unfortunately this usually results in a
large amount of distortion as well. At Velodyne, we take an already
large & powerful speaker, then use motional feedback to create a
true "servo" controlled speaker. This reduces distorion and achieves
a level of sound quality never before heard of.
Product Features & Controls
● Rigid cast aluminum basket
● Rubber surround for long excursion and durability
● Rigid spun aluminum alloy cone
● 2-1/2" high temperature voice coil
● Forced air cooling of voice coil
● Gold binding posts accept large guage wire
● Patented High-Gain-Servo control
● Selectable subsonic filter (10 or 30 hz)
● Selectable low pass crossover frequency (60 to 120 hz)
● Optional bypass for low pass crossover
● Remote mounted digital volume control (user adjustable)
● Phase selection (0, 90, 180, 270)
● Enclosure type selection; sealed, infinite baffle, etc.
● Low frequency equalization circuit; to allow use with most
amps on the market
● Delayed turn on/off; prevents pops & thumps
● Gain compression circuit; to prevent woofer from over
excursion
● Input overload protection
● Thermal power sensing; protects woofer's voice coil from
burnout