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Enclosed Subwoofer System with Single 12WØv3-4 Subwoofer Driver, Dark Gray Carpet (300 W, 4 ?) - Ported Enclosure
This powerful slot-ported BassWedge™ subwoofer system delivers awesome output at an unsurpassed value.
The slot-port runs along the bottom of the enclosure and fires on the same plane as the woofer to produce excellent extension and response smoothness. The port mouth is flared to minimize air-flow noises.
The ultra-versatile BassWedge™ shape has extended sides so that it can be placed with the woofer firing out or straight down, off the floor of the vehicle. The shape works equally well in forward or rear-firing installations. This gives you plenty of options for tweaking the loading of the enclosure into your vehicle.
This subwoofer system is shipped wired, loaded and ready to connect via a push-button terminal.
Finish: Dark gray, high-grade automotive carpet with "JL AUDIO" embroidery on the top edge and "Slot-Ported BassWedge™" embroidered on the port mouth.
Construction: MDF
Recommended amplifier power: 75
- 300W
Nominal Impedance: 4 ?
Features
Dynamic Motor Analysis - DMA Optimized Motor
Summary:
JL Audio's proprietary Dynamic Motor Analysis system is a powerful
suite of FEA-based modeling systems, first developed by JL Audio in
1997 and refined over the years to scientifically address the issue of
speaker motor linearity. This leads to vastly reduced distortion and
faithfully reproduced transients... or put simply: tight, clean,
articulate bass.
Detailed
Information:
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). Starting with the
15W3v3 and the W7 Subwoofers in 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 our component woofers.
DMA is a Finite Element Analysis (FEA)-based system, meaning that it takes a large, complex problem, breaks it down into small solution elements for analysis and 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, 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.
DMA is able to analyze the real effects of fluctuating power and excursion upon the magnetic circuit of the motor, specifically the dynamic variations of the "fixed" magnetic field. 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:
- Linear motor force over the speaker's operational excursion range
- Consistent motor force with both positive and negative current through the coil
- Consistent motor force at
varying applied power levels
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.
The payoff is reduced distortion, improved transient performance and stellar sound quality.
Specification
| Continuous Power Handling (RMS) | 300 W |
| System Nominal Impedance | 4 Ω |
| Enclosure Type | Slot-ported |
| Finish | Gray carpet |
| Grille Included | No |
| External Width (W) | 16.31 in / 414 mm |
| External Height (H) | 15.18 in / 386 mm |
| External Depth (D1) | 20.3 in / 516 mm |
| External Top Surface Depth (D2) | 15.75 in / 400 mm |
| Net Weight | 33.1 lb / 15 kg |
Buy with Confidence from a JL AUDIO Authorised Dealer and All Purchases come with a VAT Receipt.
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