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Features

Overview: The JL Audio H.O. (High Output) subwoofer enclosure system is designed around JL Audio's flagship W7 subwoofer, delivering very high SPL while retaining excellent sound quality. The H.O. enclosure is properly sized and tuned to the optimum ported alignment for the mounted 12" JL Audio W7 woofer and wired for a 3-ohm load.

H.O. Wedge Enclosure: The H.O. Wedge Enclosure features solid V-groove MDF construction with internal bracing to ensure structural integrity. The subwoofer enclosure features an angled back design to help save space in the cargo area of your vehicle. The High Output Wedge Enclosure use a patented, chamber-coupled port design. The slot-port wraps around the inner part of the enclosure and terminates just above the woofer. This type of design provides the necessary surface area and port length to maximize the performance of the JL Audio 12" W7. The enclosure's recessed mounting baffle also provides protection for the woofer. The JL Audio H.O. enclosure features a pair of gold-plated 5-way binding posts on the left side of the box. The enclosure is wired to provide a 3-ohm load at its speaker terminals.

12" W7 Woofer: The JL Audio H.O. subwoofer enclosure system features a mounted, front-firing 3-ohm 12" JL Audio W7-series woofer:

• 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.