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JL Audio 15W0V3-4 15 Inch Subwoofer

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JL Audio 15W0V3-4

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JL Audio 15W0V3-4 15 Inch Subwoofer

Sometimes, bigger is better… For these situations, the JL Audio 15W0V3-4 15 inch subwoofer offers excellent excursion capability, linearity and an overall performance envelope that puts it right at the top of its price class. It features a very sturdy 2.5 in. diameter voice coil and our patented Elevated Frame Cooling design for enhanced power handling and reliability. The JL Audio 15W0V3-4 15 inch sub is best used with amplifier power in the 150W – 500W range and is optimized to operate in a moderately sized 1.375 cu. ft. (38.9 l) sealed enclosure, or a 1.75 cu. ft. (49.6 l) ported enclosure.

15w0v3-4 is DMA Optimized

Since 1997, JL Audio has been at the  forefront of Finite Element Analysis-based modeling of loudspeaker motors and suspensions. This research is aimed at decoding what we refer to as the “Loudspeaker Genome”… a project aimed at understanding the true behavior of loudspeakers under power and in motion. A major component of this integrated system is DMA (Dynamic Motor Analysis). Since the late 1990′s and early 2000′s, DMA has played an important role in the design of all JL Audio woofers sold today, including the JL Audio 15W0V3-4. DMA is a Finite Element Analysis (FEA)-based system, meaning that it takes a large, complex problem, and breaks it down into small solution elements for analysis. The DMA then assembles the data to form an accurate, “big-picture” solution. DMA’s breakthrough is that it actually considers the effects of power through the coil as well as coil/cone position within the framework of a time-domain analysis. This gives us a highly accurate model of a speaker’s actual behavior under real power. This is something that the traditional Thiele-Small models or other low power measurements cannot do. Because DMA does not rely on a steady-state  model, it is able to consider shifts in the circuit elements being analyzed. These modeling routines are intense, requiring hours to run for a whole speaker.

Elevated Frame

Many speakers employ some sort of 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. Their 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 of the JL Audio 15W0V3-4 greatly increases thermal power handling. This reduces compression effects and does so without any additional parts.

Additional Information

Ohm 4 ohm
Power Handling RMS 500w, Peak 1000w
Dimensions Mounting Depth (E) 7.15 in / 182 mm

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