Features
Enclosure Compatibility
Features
W-Cone: The JL Audio W7AE subwoofers utilize a patented W-Cone
design; the unit-body cone assembly maximizes cone stiffness with minimal mass. The
shape also provides torsional rigidity, critical to maintaining voice coil alignment
at the suspension limits. 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 the upper skin is the part of the cone visible
from the top.
OverRoll Surround: OverRoll Surround technology allows JL Audio
to make use of the entire footprint of the speaker, placing the surround further to
the outside than in a conventional woofer. This means the oversized surround can
support greater x-max without sacrificing cone area. An added benefit is that the
mounting holes are sealed by the surround, resulting in an improved box seal.
Ultra-Long Voice Coil: The W7AE subwoofers feature an ultra-long
voice coil to enhance linear excursion, power handling and control. The large surface
area of the coil offers excellent heat dissipation, while the winding height provides
the necessary motivational force to achieve the excursion of the W7AE design.
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
analysis method aimed at improving dynamic motor behavior. As a result of DMA
optimization, W7AE motors remain linear in motor force over a long range of
excursion, and also maintain a stable fixed magnetic field in the gap over
a wide power range. This leads to reduced distortion, faithfully reproduced
transients, and tight, clean, articulate bass.
Forced Air Cooled: The elevated frame design of the W7AE
delivers cool air through slots directly above the top-plate to the voice coil.
This not only enhances power handling, but also sound quality by minimizing
dynamic parameter shifts and power compression.
Radial Cross-Drilled Pole Piece: This venting system enhances
heat dissipation and power handling by directing air flow onto the voice coil
former, working in conjunction with the Forced Air Cooling technology.
Progressive-Roll Spider: The large, progressive-roll spider
provides precise control and motor/voice coil alignment without limiting excursion
prematurely.
Plateau-Reinforced Spider Attachment: A derivative of JL
Audio's VRC technology, this suspension attachment relieves stress from the
spider material at high excursions for enhanced reliability.
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.
Enclosure Compatibility
Sealed Box: The recommended sealed box volume is 1.375
cubic feet; a diagram is provided in the owner's manual for a sealed box with
external dimensions of 15.5" W x 15.5" H x 15.0" D, assuming
3/4" thick box material (If you are using 5/8" thick materials, you
should subtract 1/4" from each dimension).
Ported Box: The recommended ported box volume is 1.75 cubic
feet; a diagram is provided in the owner's manual for a slot ported box with
external dimensions of 22.5" W x 15.5" H x 15.5" D, assuming
3/4" thick box material (If you are using 5/8" thick materials, you
should subtract 1/4" from each dimension). A slot port is recommended with
the following dimensions:
- Slot Width: 1.75"
- Slot Height: 14.0"
- Slot Length: 24.0" (a right angled port with
a 7.625" extension)
