Dynamic Motor Analysis (DMA): DMA is JL Audio's proprietary
method aimed at improving dynamic motor behavior. As a result of DMA optimization,
15W0v3-4 motors display linear force over a long excursion range, and also maintain
a stable fixed magnetic field in the gap over a wide power range. The result is
reduced distortion, faithfully reproduced transients, and tight, clean, articulate
Elevated Frame Cooling: The elevated frame design of the
12W0v3-4 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.
Rear Gasket: The woofer has a rear gasket to provide an optimal
seal when installing into the enclosure.
Long Excursion: The 15W0v3-4 subwoofer has 12.7mm of linear
excursion, giving you louder bass with less distortion.
Recommended Sealed Box Volume: JL Audio recommends a 1.875
ft³ sealed box. A diagram is provided in the owner's manual for a sealed box with
external dimensions of 16" W x 15.75" H x 18" D, assuming 3/4"
thick material. (If you are using 5/8" thick materials, you should subtract
1/4" from each dimension.)
Recommended Ported Box Volume: JL Audio recommends a 2.75
ft³ ported box. A diagram is provided in the owner's manual for a sealed box
with external dimensions of 20" W x 18" H x 18.5" D, assuming
3/4" thick material. (If you are using 5/8" thick materials, you
should subtract 1/4" from each dimension.) A round port with a diameter
of 4" and a length of 16.85" is recommended, resulting in a tuning
frequency of 25 Hz and a -3 dB point of 30 Hz.
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