Enclosure
Features
Driver Features
Enclosure Features
Enclosure: The
ProWedge sealed enclosure is
optimized for the 10" W7 subwoofer and built from 1" MDF.
It's finished in high-grade black carpet with a
gloss-black laminate front baffle trim featuring engraved "JL Audio" and "W7"
logos. Three solid, brushed aluminum rods provide stylish woofer protection.
Terminal: The enclosure
features a pair of gold plated 5-way binding posts on the left side. They will
accept pin connectors, spade connectors, single banana plugs, dual banana plugs,
and bare up to 10 gauge.
Enclosure Dimensions:
- Width: 17.875"
- Height: 14.75"
- Depth (including grille): 18.54"
- Depth (top of enclosure): 11.375"
- Depth (bottom of enclosure): 16.75"
Driver Features
W-Cone: The JL Audio W7 subwoofer utilizes
a W-Cone design, a unit-body cone assembly, that delivers astonishing cone
stiffness with minimal mass. The shape also provides incredible torsional
rigidity, which is critical to maintaining voice coil alignment at the
suspension limits. In order to gain maximum stiffness, two lightweight
mineral-filled polypropylene skins are bonded together at the perimeter and the
center of the assembly. The lower skin's cross-section is shaped like a "W", and
provides incredible rigidity when bonded to the dished upper skin.
OverRoll Surround: OverRoll Surround
technology allows JL Audio to make full use of the entire footprint of the
speaker, placing the surround further to the outside than in a conventional
woofer. This means that W7 subwoofer can use a large roll for all its benefits
without sacrificing cone area. By maximizing the effective piston/total
footprint ratio, the W7 subwoofer can deliver more output for a given excursion
and outside frame diameter. This means that the prodigious excursion advantage
of the W7 can be put to full use enhancing output, rather than making up for
lost piston area. This technology also provides a geometry advantage on the
outside edge of the surround roll, allowing for more linear operation. A further
benefit is that the mounting holes are inherently sealed by the surround,
resulting in an improved box seal.
Ultra-Long Voice Coil: The W7 subwoofer
features an ultra-long voice coil to allow extreme linear excursion, phenomenal
power handling and control. The massive surface area of these coils is excellent
for heat dissipation, while the huge winding height provides the necessary
motivational force to achieve the huge excursion of the W7 designs. Considering
their size, the W7 voice coils are extremely light in weight. The W7 uses
aluminum-alloy wire (instead of conventional copper) and a specific winding
method to achieve JL Audio's desired electrical properties. The light weight of
the coils helps keep the overall moving mass down at manageable levels, which is
extremely important for efficiency and sound quality reasons.
Floating Cone Attachment Method (FCAM): JL
Audio's patented FCAM technology is an innovative method of bonding the
surround/cone assembly to the voice coil/spider assembly. This assembly
technique ensures proper surround geometry in the assembled speaker for better
excursion control and dynamic voice coil alignment.
Dynamic Motor Analysis (DMA): DMA is JL
Audio's proprietary method aimed at improving dynamic motor behavior. As a
result of DMA optimization, W7 motors remain linear in motor force over a very
long range of excursion, and also maintain a highly stable fixed magnetic field
in the gap over a wide power range. The result is vastly reduced distortion,
faithfully reproduced transients, and tight, clean, articulate bass.
Massive Forced Air Cooled: The elevated
frame design of the W7 delivers cool air through slots directly above the
top-plate to the voice coil of the speaker. This not only enhances power
handling, but also sound quality by minimizing dynamic parameter shifts and
power compression.
Radial Cross-Drilled Pole Piece: This
innovative venting system greatly enhances thermal dissipation and power
handling by directing air flow onto the voice coil former and works in
conjunction with the Elevated Frame cooling technology to effectively remove
heat from the voice coil. This improves power handling and reduces power
compression effects, leading to more linear performance.
Progressive-Roll Spider: The large,
progressive-roll spider provides precise control and motor/voice coil alignment
without limiting excursion prematurely.
Plateau-Reinforced Spider Attachment: The
lower reinforcement collar, attached to the voice coil former of the W7,
incorporates a plateau design dedicated to relieving material stress and
providing a solid attachment surface for the inner edge of the spider. The
plateau of the reinforcement collar provides excellent contact area for adhesive
therefore creating an incredibly strong bond at a critical point within the
driver.
Co-Extruded Double Lead Wires: The
extruded casing and carefully engineered attachments ensure controlled lead-wire
behavior under the most extreme excursion demands. Two conductors are used per
connection for ample current carrying capability.
