This delivers intensely valuable information compared to traditional modeling, which assumes that the "fixed" field produced in the air gap by the magnet and the motor plates is unchanging. DMA not only shows that this "fixed" field changes in reaction to the magnetic field created by current flowing through the voice coil, but it helps our engineers arrive at motor solutions that minimize this instability. Analyzing this behavior is critical to understanding the distortion mechanisms of a speaker motor and sheds light on the aspects of motor design that determine truly linear behavior:.
Our ability to fully analyze these aspects of motor behavior allows our transducer engineers to make critical adjustments to motor designs that result in extremely linear, highly stable dynamic loudspeaker motor systems. Summary: JL Audio's patented Elevated Frame Cooling design 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.
Detailed Information: Many speakers employ venting techniques to enhance voice coil cooling. This is typically accomplished by having big holes in the sides of the frame just below the spider attachment shelf. While it provides a modest cooling benefit, this low-velocity air-flow does not blow directly or strongly on the voice coil. Our patented design improves upon this cooling technique in a number of ways. By elevating the frame above the top-plate of the motor via stand-offs integrated into the bottom of the frame a narrow, high-velocity air-path is created between the bottom surface of the frame and the top surface of the top-plate.
This air path leads directly to the voice coil and then turns upward into the spider air cavity. By utilizing the pumping action of the spider through this focused air path, a large volume of cool air hits the coil windings directly. Another important benefit is that the upper surface of the top-plate one of the speaker's hottest parts is directly exposed to cooling air flow, whereas on a conventional design it is isolated from the air flow by the lower flange of the frame.
The elevated frame technology greatly increases thermal power handling, reduces compression effects and does so without any additional parts. Summary: This assembly technique, conceived by JL Audio, ensures proper surround geometry in the assembled speaker for better excursion control and dynamic voice coil alignment.
This feature helps ensure concentricity of the surround, spider and voice coil without torquing the suspension to achieve it. This allows for the inevitable, slight variations in production part dimensions without having them negatively impact the integrity of the suspension and coil-centering at high excursions. By reinforcing the critical junction between the cone, voice coil and spider, the VRC greatly reduces failures due to glue breakdown or material weakness.
It does this by greatly increasing adhesive contact area and providing stress relief to the spider material at excursion extremes.
This reduces thermal compression effects and enhances reliability. Summary: Spiders, voice coils, terminals and lead wires are preassembled, using a patented process, onto a composite carrier for improved precision and reliability.
Detailed Information: A conventional speaker is assembled in layers. In other words, multiple parts are assembled and glued sequentially into the basket, leading to stacking of tolerances and making it difficult to achieve optimal assembly precision. JL Audio's patent-pending insert-molded spider carrier permanently bonds the spider to a mechanically robust carrier that also incorporates the terminal assembly and lead wire strain relief features for enhanced reliability and optimal alignment of parts.
This subassembly is assembled outside the speaker basket, for optimum alignment and glue-joint integrity. The benefit is a more precisely built, more mechanically sound loudspeaker. Summary: This removable ring can be painted to match the installation theme and directly receives JL Audio grille mesh inserts sold separately. Detailed Information: This ABS trim ring is molded in black, but that doesn't mean it has to stay that way. By custom painting it, you can match your installation theme and create a personalized look.
Specifically-designed grille mesh inserts are available separately and fit into the inner diameter of the trim ring. Helpful Tip: Installing the grille mesh inserts is much easier before mounting the woofer into the enclosure. Summary: Carefully engineered lead-wire design and attachments ensure controlled, quiet lead-wire behavior under the most extreme excursion demands. Detailed Information: Managing the lead-wires on a long-excursion woofer is one of the trickier aspects of its mechanical design.
To address this, many long-excursion woofers today rely on a simple solution that weaves the lead-wires into the spider rear suspension of the driver. The biggest problem with this approach is that spider limiting behavior plays a hugely important role a woofer's performance. Lead-wires that are attached or woven into the spider material can alter the spider's "stretching" behavior.
The tinsel wire naturally has less 'give' than the fabric material of the spider leading to asymmetrical spider behavior and non-uniform stress distribution around the spider circumference. The wire attachment points can also cause localized pulling and tearing forces at the spider's excursion limits.
As such, longevity becomes a major concern and makes the woven-in design less than ideal for very long-excursion designs. While a traditional 'flying lead' design does not compromise spider linearity or radial stability, it creates its own challenges on a long-excursion woofer.
Managing the 'whipping' behavior of the wire and making sure it does not contact the cone or spider is one challenge. Another is ensuring that the leads do not short one another or the frame of the woofer.
To overcome these issues, JL Audio's engineered flying lead-wires work in conjunction with carefully engineered entry and exit support structures molded into the terminals and the voice coil collar. Some models also feature jacketed lead-wires to further reduce the likelihood of shorting and fatigue.
The result is flawless high-excursion lead-wire behavior, with outstanding reliability and none of the compromises inherent to a woven-in lead wire system. Building woofers this way requires much more labor and parts complexity than the simpler woven-in approach, but the payoff is in reduced distortion, reduced mechanical noise and improved reliability. Summary: JL Audio's Miramar, Florida loudspeaker production facility is one of the most advanced in the world.
This, combined with our commitment to state-of-the-art assembly technology, allows our skilled workforce to efficiently build JL Audio products to extremely high quality standards, right here in the U. Since most of our premium loudspeakers incorporate proprietary, patented technologies requiring specific assembly techniques, we find it is vital that the people who designed them have close access to the people manufacturing them.
Give these a try, people -- I think you are going to like them. Stay informed about new products and promotions. This driver is an excellent performer even in bigger size cabinets so it can be used in top class floor-standing systems. This DIY kit for in-wall speakers allow you to easily build high-end in-wall or in-ceiling speaker, simply mount this speaker in your own baffle.
Crossover and fasteners included. These in-wall speaker parts allow you to easily build high-end in-wall or in-ceiling speaker, simply mount this speaker in your own baffle.
Abaca Audio 4 Inch high-end shielded woofer offers natural and detailed sound performance with very low distortion. Abaca Audio 4 Inch 4 ohm high-end shielded woofer offers natural and detailed sound performance with very low distortion.
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