JL Audio W7 - Manual (Page 3)

1 - OverRoll™ Surr
ound
(U.S. Patent #5,687,247
and #5,949,898)
By utilizing space
wasted in conventional
speakers, this
ground-breaking
innovation controls
the W7’s massive
excursion without
sacrificing precious
cone area.
2 - W-cone™ (U
.S. Patent #6,496,590)
The W-Cone™ is a
unit-body cone assembly
that delivers
astonishing cone
stiffness with minimal
mass. The shape
also provides incr
edible torsional rig
idity, which is critical
to maintaining voice
coil alignment at
the suspension
limits.
3 - floating-cone™
Attach Method
(U.S. Patent #6,501,844)
Our newly conceiv
ed assembly technique
ensures proper
surround geometr
y in the assembled
speaker for better
excursion control
and dynamic voice
coil alignment.
A small detail that
means a lot when
you’re pumping the
cone to the excursion
extremes the W7
is capable of.
4 - Plateau-Reinf
orced Spider Attachmen
t
(U.S. Patent #6,118,884)
A derivative of JL
Audio’s famous VR
C technology, this
bulletproof suspension
attachment reliev
es stress from
the spider material
at high-excursions
for enhanced
reliability.
5 - Radially cross-D
rilled Pole Piece
(U.S. Patent #6,243,479)
This innovative venting
system greatly enhances
thermal dissipation
and power handling
by directing air
flow onto the voice
coil former, working
in conjunction
with technology
#6.
6 - Massive forced-
Air-cooled
Aluminum Alloy
frame (U.S. Paten
t #D472,891,
#6,219,431 and #6,229,902)
The elevated frame
design of the W7
delivers cool air
through slots direc
tly above the top
-plate to the voice
coil
of the speaker. This
not only enhances
power handling,
but also sound qualit
y by minimizing dynamic
parameter
shifts and power
compression.
7 - Highly Linear
, DMA-Optimized
Motor System
DMA is JL Audio’s
proprietary Dynamic
Motor Analysis
system and is aimed
at improving dynamic
motor
behavior. As a result
of DMA optimization,
W7 motors
remain linear in mot
or force over an ex
treme range
of excursion and
also maintain a highly
stable fixed
magnetic field in
the gap over a wide
power range.
This leads to vastly
reduced distortion
and faithfully
reproduced transients
... or put simply: tight,
clean,
articulate bass.
8 - Huge Diamet
er, Progressive-Roll
Spider
Arrived at after int
ense computer analysis
and
optimization, the
W7 spiders provide
precise control
and motor/voice
coil alignment without
prematurely
limiting excursion.
9 - co-Extruded
Double Lead-Wir
es
The extruded casing
and carefully eng
ineered
attachments ensur
e controlled lead-
wire behavior under
the most extreme
excursion demands
. Two conductors
are used per connec
tion for ample cur
rent carrying
capability.
10 - Ultra-long V
oice coil
To allow extreme
linear excursion, phenomenal
power
handling and contr
ol, control, control
.
W7 Technologies
In addition to the
patented technolog
ies listed above, multiple
U.S. and International
patents are curren
tly pending.
WARNING:
Prolonged exposur
e to high sound pr
essure levels can
lead to permanent
hearing loss. W7 sub
woofers are
capable of reproducing
sound at extremely
high sound pressur
e levels. Please ex
ercise restraint in
the operation of y
our
system in order to
preserve your hear
ing and your long-t
erm enjoyment of
this product’s sound
quality capabilities
.
3